Autocomplete.test.js

import * as React from 'react';
import PropTypes from 'prop-types';
import { expect } from 'chai';
import {
  act,
  createRenderer,
  fireEvent,
  screen,
  strictModeDoubleLoggingSuppressed,
  reactMajor,
} from '@mui/internal-test-utils';
import { spy } from 'sinon';
import userEvent from '@testing-library/user-event';
import Box from '@mui/system/Box';
import { ThemeProvider, createTheme } from '@mui/material/styles';
import TextField from '@mui/material/TextField';
import Chip, { chipClasses } from '@mui/material/Chip';
import Autocomplete, {
  autocompleteClasses as classes,
  createFilterOptions,
} from '@mui/material/Autocomplete';
import { paperClasses } from '@mui/material/Paper';
import { iconButtonClasses } from '@mui/material/IconButton';
import InputAdornment from '@mui/material/InputAdornment';
import Tooltip from '@mui/material/Tooltip';
import describeConformance from '../../test/describeConformance';

function checkHighlightIs(listbox, expected) {
  const focused = listbox.querySelector(`.${classes.focused}`);

  if (expected) {
    if (focused) {
      expect(focused).to.have.text(expected);
    } else {
      // No options selected
      expect(null).to.equal(expected);
    }
  } else {
    expect(focused).to.equal(null);
  }
}

describe('<Autocomplete />', () => {
  const { render } = createRenderer();

  describeConformance(
    <Autocomplete
      options={['one', 'two']}
      defaultValue="one"
      open
      renderInput={(params) => <TextField {...params} />}
    />,
    () => ({
      classes,
      inheritComponent: 'div',
      render,
      muiName: 'MuiAutocomplete',
      testVariantProps: { variant: 'foo' },
      testDeepOverrides: { slotName: 'endAdornment', slotClassName: classes.endAdornment },
      testStateOverrides: { prop: 'fullWidth', value: true, styleKey: 'fullWidth' },
      refInstanceof: window.HTMLDivElement,
      testComponentPropWith: 'div',
      slots: {
        listbox: { expectedClassName: classes.listbox },
        paper: { expectedClassName: classes.paper },
        popper: { expectedClassName: classes.popper, testWithElement: null },
      },
      skip: ['componentProp', 'componentsProp'],
    }),
  );

  describeConformance(
    <Autocomplete
      options={['one', 'two']}
      defaultValue="one"
      open
      renderInput={(params) => <TextField {...params} />}
    />,
    () => ({
      classes,
      render,
      muiName: 'MuiAutocomplete',
      slots: {
        clearIndicator: { expectedClassName: classes.clearIndicator },
        popupIndicator: { expectedClassName: classes.popupIndicator },
      },
      only: ['slotPropsProp'],
    }),
  );

  describeConformance(
    <Autocomplete
      options={['one', 'two']}
      defaultValue={['one']}
      multiple
      open
      renderInput={(params) => <TextField {...params} />}
    />,
    () => ({
      classes,
      render,
      muiName: 'MuiAutocomplete',
      slots: {
        chip: {},
      },
      only: ['slotPropsProp'],
    }),
  );

  it('should be customizable in the theme', () => {
    const theme = createTheme({
      components: {
        MuiAutocomplete: {
          styleOverrides: {
            paper: {
              mixBlendMode: 'darken',
            },
          },
        },
      },
    });

    render(
      <ThemeProvider theme={theme}>
        <Autocomplete options={[]} open renderInput={(params) => <TextField {...params} />} />
      </ThemeProvider>,
    );
    expect(document.querySelector(`.${classes.paper}`)).to.toHaveComputedStyle({
      mixBlendMode: 'darken',
    });
  });

  it('should not throw error when accessing ownerState in styleOverrides', () => {
    const theme = createTheme({
      components: {
        MuiAutocomplete: {
          styleOverrides: {
            root: ({ ownerState }) => {
              return {
                outlineColor: ownerState.size === 'small' ? 'magenta' : 'crimson',
              };
            },
          },
        },
      },
    });

    expect(() => {
      render(
        <ThemeProvider theme={theme}>
          <Autocomplete
            open
            options={['one', 'two', 'three']}
            renderInput={(params) => <TextField {...params} />}
          />
        </ThemeProvider>,
      );
    }).not.to.throw();
  });

  describe('combobox', () => {
    it('should clear the input when blur', () => {
      const { getByRole } = render(
        <Autocomplete options={[]} renderInput={(params) => <TextField {...params} />} />,
      );
      const input = getByRole('combobox');

      act(() => {
        input.focus();
        fireEvent.change(document.activeElement, { target: { value: 'a' } });
      });

      expect(input.value).to.equal('a');

      act(() => {
        document.activeElement.blur();
      });
      expect(input.value).to.equal('');
    });

    it('should apply the icon classes', () => {
      const { container } = render(
        <Autocomplete
          value="one"
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      expect(container.querySelector(`.${classes.root}`)).to.have.class(classes.hasClearIcon);
      expect(container.querySelector(`.${classes.root}`)).to.have.class(classes.hasPopupIcon);
    });
  });

  describe('prop: loading', () => {
    it('should show a loading message when open', () => {
      render(
        <Autocomplete
          options={[]}
          freeSolo
          loading
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      fireEvent.keyDown(screen.getByRole('combobox'), { key: 'ArrowDown' });
      expect(document.querySelector(`.${classes.paper}`).textContent).to.equal('Loading…');
    });

    it('should show supplied options to the "options" prop even when loading', () => {
      render(
        <Autocomplete
          options={['one', 'two']}
          loading
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      fireEvent.keyDown(screen.getByRole('combobox'), { key: 'ArrowDown' });
      expect(document.querySelector(`.${classes.paper}`).textContent).not.to.equal('Loading…');

      const listbox = screen.getByRole('listbox');
      const htmlOptions = listbox.querySelectorAll('li');
      expect(htmlOptions[0].innerHTML).to.equal('one');
    });
  });

  describe('prop: autoHighlight', () => {
    it('should set the focus on the first item', () => {
      const options = ['one', 'two'];
      const { getByRole } = render(
        <Autocomplete
          freeSolo
          autoHighlight
          open
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      checkHighlightIs(getByRole('listbox'), 'one');
      fireEvent.change(document.activeElement, { target: { value: 'oo' } });
      fireEvent.change(document.activeElement, { target: { value: 'o' } });
      checkHighlightIs(getByRole('listbox'), 'one');
    });

    it('should keep the highlight on the first item', () => {
      const options = ['one', 'two'];
      const { getByRole } = render(
        <Autocomplete
          value="one"
          autoHighlight
          open
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      checkHighlightIs(getByRole('listbox'), 'one');
      fireEvent.change(document.activeElement, { target: { value: 'two' } });
      checkHighlightIs(getByRole('listbox'), 'two');
    });

    it('should set the focus on the first item when possible', () => {
      const options = ['one', 'two'];
      const { getByRole, setProps } = render(
        <Autocomplete
          open
          options={[]}
          autoHighlight
          loading
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');
      expect(textbox).not.to.have.attribute('aria-activedescendant');

      setProps({ options, loading: false });
      expect(textbox).to.have.attribute(
        'aria-activedescendant',
        screen.getAllByRole('option')[0].getAttribute('id'),
      );
    });

    it('should set the highlight on selected item when dropdown is expanded', () => {
      const { getByRole, setProps } = render(
        <Autocomplete
          value="one"
          open
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      checkHighlightIs(getByRole('listbox'), 'one');
      setProps({ value: 'two' });
      checkHighlightIs(getByRole('listbox'), 'two');
    });

    // https://github.com/mui/material-ui/issues/34998
    it('should scroll the listbox to the top when keyboard highlight wraps around after the last item is highlighted', function test() {
      if (/jsdom/.test(window.navigator.userAgent)) {
        this.skip();
      }

      const { getByRole } = render(
        <Autocomplete
          open
          options={['one', 'two', 'three', 'four', 'five']}
          renderInput={(params) => <TextField {...params} />}
          ListboxProps={{ style: { padding: 0, maxHeight: '100px' } }}
          PopperComponent={(props) => {
            const { disablePortal, anchorEl, open, ...other } = props;
            return <Box {...other} />;
          }}
        />,
      );
      const textbox = getByRole('combobox');
      act(() => {
        textbox.focus();
      });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });

      checkHighlightIs(getByRole('listbox'), 'one');
      expect(getByRole('listbox')).to.have.property('scrollTop', 0);
    });

    it('should keep the current highlight if possible', () => {
      const { getByRole } = render(
        <Autocomplete
          multiple
          defaultValue={['one']}
          open
          options={['one', 'two', 'three']}
          disableCloseOnSelect
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      checkHighlightIs(getByRole('listbox'), 'one');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'two');
      fireEvent.keyDown(textbox, { key: 'Enter' });
      checkHighlightIs(getByRole('listbox'), 'two');
    });

    it('should work with filterSelectedOptions too', () => {
      const options = ['Foo', 'Bar', 'Baz'];
      const { getByRole } = render(
        <Autocomplete
          multiple
          filterSelectedOptions
          autoHighlight
          value={options.slice(0, 1)}
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'Bar');
      fireEvent.change(textbox, { target: { value: 'a' } });
      checkHighlightIs(getByRole('listbox'), 'Bar');
      fireEvent.change(textbox, { target: { value: 'aa' } });
      fireEvent.change(textbox, { target: { value: 'a' } });
      checkHighlightIs(getByRole('listbox'), 'Bar');
    });
  });

  describe('highlight synchronisation', () => {
    it('should not update the highlight when multiple open and value change', () => {
      const { setProps, getByRole } = render(
        <Autocomplete
          value={['two']}
          multiple
          open
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      checkHighlightIs(getByRole('listbox'), 'two');
      setProps({
        value: [],
      });
      checkHighlightIs(getByRole('listbox'), 'two');
    });
  });

  describe('prop: limitTags', () => {
    it('show all items on focus', () => {
      const { container, getAllByRole, getByRole } = render(
        <Autocomplete
          multiple
          limitTags={2}
          options={['one', 'two', 'three']}
          defaultValue={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} variant="standard" />}
        />,
      );

      expect(container.textContent).to.equal('onetwo+1');
      // include hidden clear button because JSDOM thinks it's visible
      expect(getAllByRole('button', { hidden: true })).to.have.lengthOf(4);

      act(() => {
        getByRole('combobox').focus();
      });
      expect(container.textContent).to.equal('onetwothree');
      // Depending on the subset of components used in this test run the computed `visibility` changes in JSDOM.
      if (!/jsdom/.test(window.navigator.userAgent)) {
        expect(getAllByRole('button', { hidden: false })).to.have.lengthOf(5);
      }
    });

    it('show 0 item on close when set 0 to limitTags', () => {
      const { container, getAllByRole, getByRole } = render(
        <Autocomplete
          multiple
          limitTags={0}
          options={['one', 'two', 'three']}
          defaultValue={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} variant="standard" />}
        />,
      );

      expect(container.textContent).to.equal('+3');
      // include hidden clear button because JSDOM thinks it's visible
      expect(getAllByRole('button', { hidden: true })).to.have.lengthOf(2);

      act(() => {
        getByRole('combobox').focus();
      });
      expect(container.textContent).to.equal('onetwothree');
      // Depending on the subset of components used in this test run the computed `visibility` changes in JSDOM.
      if (!/jsdom/.test(window.navigator.userAgent)) {
        expect(getAllByRole('button', { hidden: false })).to.have.lengthOf(5);
      }
    });
  });

  describe('prop: filterSelectedOptions', () => {
    it('when the last item is selected, highlights the new last item', () => {
      const { getByRole } = render(
        <Autocomplete
          filterSelectedOptions
          openOnFocus
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowUp' });
      checkHighlightIs(getByRole('listbox'), 'three');
      fireEvent.keyDown(textbox, { key: 'Enter' }); // selects the last option (three)

      act(() => {
        textbox.blur();
        textbox.focus(); // opens the listbox again
      });
      checkHighlightIs(getByRole('listbox'), null);
    });
  });

  describe('prop: autoSelect', () => {
    it('should not clear on blur when value does not match any option', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      render(
        <Autocomplete
          freeSolo
          autoSelect
          options={options}
          onChange={handleChange}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.change(textbox, { target: { value: 'o' } });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.change(textbox, { target: { value: 'oo' } });
      act(() => {
        textbox.blur();
      });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal('oo');
    });

    it('should add new value when autoSelect & multiple on blur', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      render(
        <Autocomplete
          autoSelect
          multiple
          value={[options[0]]}
          openOnFocus
          options={options}
          onChange={handleChange}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      act(() => {
        fireEvent.change(textbox, { target: { value: 't' } });
        fireEvent.keyDown(textbox, { key: 'ArrowDown' });
        textbox.blur();
      });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal(options);
    });

    it('should add new value when autoSelect & multiple & freeSolo on blur', () => {
      const handleChange = spy();
      render(
        <Autocomplete
          autoSelect
          freeSolo
          multiple
          onChange={handleChange}
          options={[]}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      fireEvent.change(document.activeElement, { target: { value: 'a' } });
      act(() => {
        document.activeElement.blur();
      });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal(['a']);
    });
  });

  describe('prop: multiple', () => {
    it('should not crash', () => {
      const { getByRole } = render(
        <Autocomplete
          openOnFocus
          options={[]}
          renderInput={(params) => <TextField {...params} />}
          multiple
        />,
      );
      const input = getByRole('combobox');

      act(() => {
        input.focus();
        document.activeElement.blur();
        input.focus();
      });
    });

    it('should remove the last option', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      const { getAllByTestId } = render(
        <Autocomplete
          options={[]}
          defaultValue={options}
          onChange={handleChange}
          renderInput={(params) => <TextField {...params} />}
          multiple
        />,
      );
      fireEvent.click(getAllByTestId('CancelIcon')[1]);
      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal([options[0]]);
    });

    it('navigates between different tags', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      render(
        <Autocomplete
          defaultValue={options}
          options={options}
          onChange={handleChange}
          renderInput={(params) => <TextField {...params} autoFocus />}
          multiple
        />,
      );
      const textbox = screen.getByRole('combobox');
      const [firstSelectedValue, secondSelectedValue] = screen.getAllByRole('button');

      fireEvent.keyDown(textbox, { key: 'ArrowLeft' });
      expect(secondSelectedValue).toHaveFocus();

      fireEvent.keyDown(secondSelectedValue, { key: 'ArrowLeft' });
      expect(firstSelectedValue).toHaveFocus();

      fireEvent.keyDown(firstSelectedValue, { key: 'Backspace' });
      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal([options[1]]);
      expect(textbox).toHaveFocus();
    });

    it('deletes a focused tag when pressing the delete key', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      render(
        <Autocomplete
          defaultValue={options}
          options={options}
          onChange={handleChange}
          renderInput={(params) => <TextField {...params} autoFocus />}
          multiple
        />,
      );
      const textbox = screen.getByRole('combobox');
      const [firstSelectedValue, secondSelectedValue] = screen.getAllByRole('button');

      // check that no tags get deleted when the tag is not a focused tag
      fireEvent.keyDown(textbox, { key: 'Delete' });

      expect(handleChange.callCount).to.equal(0);
      expect(textbox).toHaveFocus();

      // expect on focused tag to delete when pressing delete key
      fireEvent.keyDown(textbox, { key: 'ArrowLeft' });

      expect(secondSelectedValue).toHaveFocus();

      fireEvent.keyDown(secondSelectedValue, { key: 'ArrowLeft' });

      expect(firstSelectedValue).toHaveFocus();

      fireEvent.keyDown(firstSelectedValue, { key: 'Delete' });

      expect(handleChange.callCount).to.equal(1);
      expect(textbox).toHaveFocus();
    });

    it('should keep listbox open on pressing left or right keys when inputValue is not empty', () => {
      const handleClose = spy();
      const options = ['one', 'two', 'three'];
      const { getByRole } = render(
        <Autocomplete
          options={options}
          onClose={handleClose}
          renderInput={(params) => <TextField {...params} autoFocus />}
          multiple
          inputValue="tw"
        />,
      );

      const textbox = getByRole('combobox');

      fireEvent.mouseDown(textbox);
      fireEvent.keyDown(textbox, { key: 'ArrowLeft' });

      expect(handleClose.callCount).to.equal(0);
      expect(textbox).to.have.attribute('aria-expanded', 'true');
    });

    it('should close listbox on pressing left or right keys when inputValue is empty', () => {
      const handleClose = spy();
      const options = ['one', 'two', 'three'];
      const { getByRole } = render(
        <Autocomplete
          options={options}
          onClose={handleClose}
          renderInput={(params) => <TextField {...params} autoFocus />}
          multiple
          inputValue=""
        />,
      );

      const textbox = getByRole('combobox');

      fireEvent.mouseDown(textbox);
      fireEvent.keyDown(textbox, { key: 'ArrowLeft' });

      expect(handleClose.callCount).to.equal(1);
      expect(textbox).to.have.attribute('aria-expanded', 'false');
    });

    it('should not crash if a tag is missing', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      render(
        <Autocomplete
          defaultValue={options}
          options={options}
          value={options}
          renderTags={(value, getTagProps) =>
            value
              .filter((x, index) => index === 1)
              .map((option, index) => {
                const { key, ...tagProps } = getTagProps({ index });
                return <Chip key={key} label={option.title} {...tagProps} />;
              })
          }
          onChange={handleChange}
          renderInput={(params) => <TextField {...params} autoFocus />}
          multiple
        />,
      );
      const textbox = screen.getByRole('combobox');
      const [firstSelectedValue] = screen.getAllByRole('button');

      fireEvent.keyDown(textbox, { key: 'ArrowLeft' });
      // skip value "two"
      expect(firstSelectedValue).toHaveFocus();

      fireEvent.keyDown(firstSelectedValue, { key: 'ArrowRight' });
      expect(textbox).toHaveFocus();
    });

    it('should not call onChange function for duplicate values', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      render(
        <Autocomplete
          freeSolo
          defaultValue={options}
          options={options}
          onChange={handleChange}
          renderInput={(params) => <TextField {...params} autoFocus />}
          multiple
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.change(textbox, { target: { value: 'two' } });
      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(handleChange.callCount).to.equal(0);

      fireEvent.change(textbox, { target: { value: 'three' } });
      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(handleChange.callCount).to.equal(1);
    });

    it('has no textbox value', () => {
      render(
        <Autocomplete
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
          multiple
          value={['one', 'two']}
        />,
      );

      expect(screen.getByRole('combobox')).to.have.property('value', '');
    });

    it('should fail validation if a required field has no value', function test() {
      if (/jsdom/.test(window.navigator.userAgent)) {
        // Enable once https://github.com/jsdom/jsdom/issues/2898 is resolved
        this.skip();
      }

      const handleSubmit = spy((event) => event.preventDefault());
      render(
        <form onSubmit={handleSubmit}>
          <Autocomplete
            multiple
            options={['one', 'two']}
            renderInput={(params) => <TextField {...params} required />}
            value={[]}
          />
          <button type="submit">Submit</button>
        </form>,
      );

      screen.getByRole('button', { name: 'Submit' }).click();

      expect(handleSubmit.callCount).to.equal(0);
    });

    it('should fail validation if a required field has a value', function test() {
      // Unclear how native Constraint validation can be enabled for `multiple`
      if (/jsdom/.test(window.navigator.userAgent)) {
        // Enable once https://github.com/jsdom/jsdom/issues/2898 is resolved
        // The test is passing in JSDOM but form validation is buggy in JSDOM so we rather skip than have false confidence
        this.skip();
      }

      const handleSubmit = spy((event) => event.preventDefault());
      render(
        <form onSubmit={handleSubmit}>
          <Autocomplete
            multiple
            options={['one', 'two']}
            renderInput={(params) => <TextField {...params} required />}
            value={['one']}
          />
          <button type="submit">Submit</button>
        </form>,
      );

      screen.getByRole('button', { name: 'Submit' }).click();

      expect(handleSubmit.callCount).to.equal(0);
    });
  });

  it('should trigger a form expectedly', () => {
    const handleSubmit = spy();
    function Test(props) {
      const { key, ...others } = props;
      return (
        <div
          onKeyDown={(event) => {
            if (!event.defaultPrevented && event.key === 'Enter') {
              handleSubmit();
            }
          }}
        >
          <Autocomplete
            options={['one', 'two']}
            renderInput={(props2) => <TextField {...props2} autoFocus />}
            key={key}
            {...others}
          />
        </div>
      );
    }
    const { setProps } = render(<Test />);
    let textbox = screen.getByRole('combobox');

    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleSubmit.callCount).to.equal(1);

    fireEvent.change(textbox, { target: { value: 'o' } });
    fireEvent.keyDown(textbox, { key: 'ArrowDown' });
    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleSubmit.callCount).to.equal(1);

    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleSubmit.callCount).to.equal(2);

    setProps({ key: 'test-2', multiple: true, freeSolo: true });
    textbox = screen.getByRole('combobox');

    fireEvent.change(textbox, { target: { value: 'o' } });
    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleSubmit.callCount).to.equal(2);

    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleSubmit.callCount).to.equal(3);

    setProps({ key: 'test-3', freeSolo: true });
    textbox = screen.getByRole('combobox');

    fireEvent.change(textbox, { target: { value: 'o' } });
    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleSubmit.callCount).to.equal(4);
  });

  it('should not open the autocomplete popup when deleting chips', async () => {
    const { queryByRole, queryByText, user } = render(
      <Autocomplete
        multiple
        options={['one', 'two', 'three']}
        defaultValue={['one']}
        renderInput={(params) => <TextField {...params} autoFocus />}
      />,
    );

    expect(queryByRole('listbox')).to.equal(null);

    const chip = queryByText('one').parentElement;
    expect(chip).not.to.equal(null);

    // Delete the chip
    await user.click(chip.getElementsByClassName(chipClasses.deleteIcon)[0]);

    expect(queryByText('one')).to.equal(null);
    expect(queryByRole('listbox')).to.equal(null);
  });

  it('should toggle the autocomplete popup when clicking the popup indicator', async () => {
    const { queryByRole, getByRole, user } = render(
      <Autocomplete
        multiple
        options={['One', 'Two', 'Three']}
        renderInput={(params) => <TextField {...params} autoFocus />}
      />,
    );

    expect(queryByRole('listbox')).to.equal(null);

    const popupIndicator = getByRole('button', { name: 'Open' });
    await user.click(popupIndicator);

    expect(queryByRole('listbox')).not.to.equal(null);

    await user.click(popupIndicator);

    expect(queryByRole('listbox')).to.equal(null);
  });

  describe('prop: getOptionDisabled', () => {
    it('should prevent the disabled option to trigger actions but allow focus with disabledItemsFocusable', () => {
      const handleSubmit = spy();
      const handleChange = spy();
      const { getAllByRole } = render(
        <div
          onKeyDown={(event) => {
            if (!event.defaultPrevented && event.key === 'Enter') {
              handleSubmit();
            }
          }}
        >
          <Autocomplete
            disabledItemsFocusable
            getOptionDisabled={(option) => option === 'two'}
            onChange={handleChange}
            openOnFocus
            options={['one', 'two', 'three']}
            renderInput={(props2) => <TextField {...props2} autoFocus />}
          />
        </div>,
      );

      let options;
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      options = getAllByRole('option');
      expect(textbox).to.have.attribute('aria-activedescendant', options[1].getAttribute('id'));

      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(handleSubmit.callCount).to.equal(0);
      expect(handleChange.callCount).to.equal(0);

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      options = getAllByRole('option');
      expect(textbox).to.have.attribute('aria-activedescendant', options[0].getAttribute('id'));

      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(handleSubmit.callCount).to.equal(0);
      expect(handleChange.callCount).to.equal(1);
    });

    it('should skip disabled options when navigating via keyboard', () => {
      const { getByRole } = render(
        <Autocomplete
          getOptionDisabled={(option) => option === 'two'}
          openOnFocus
          options={['one', 'two', 'three']}
          renderInput={(props) => <TextField {...props} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'one');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'three');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'one');
    });

    it('should skip disabled options at the end of the list when navigating via keyboard', () => {
      const { getByRole } = render(
        <Autocomplete
          getOptionDisabled={(option) => option === 'three' || option === 'four'}
          openOnFocus
          options={['one', 'two', 'three', 'four']}
          renderInput={(props) => <TextField {...props} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'one');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'two');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'one');
    });

    it('should skip the first and last disabled options in the list when navigating via keyboard', () => {
      const { getByRole } = render(
        <Autocomplete
          getOptionDisabled={(option) => option === 'one' || option === 'five'}
          openOnFocus
          options={['one', 'two', 'three', 'four', 'five']}
          renderInput={(props) => <TextField {...props} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'two');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'four');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), 'two');
      fireEvent.keyDown(textbox, { key: 'ArrowUp' });
      checkHighlightIs(getByRole('listbox'), 'four');
    });

    it('should not focus any option when all the options are disabled', () => {
      const { getByRole } = render(
        <Autocomplete
          getOptionDisabled={() => true}
          openOnFocus
          options={['one', 'two', 'three']}
          renderInput={(props) => <TextField {...props} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      checkHighlightIs(getByRole('listbox'), null);
      fireEvent.keyDown(textbox, { key: 'ArrowUp' });
      checkHighlightIs(getByRole('listbox'), null);
    });
  });

  describe('WAI-ARIA conforming markup', () => {
    specify('when closed', () => {
      const { getAllByRole, getByRole, queryByRole } = render(
        <Autocomplete options={[]} renderInput={(params) => <TextField {...params} />} />,
      );

      const textbox = getByRole('combobox');
      expect(textbox).to.have.attribute('aria-expanded', 'false');
      // reflected aria-haspopup is `listbox`
      // this assertion can fail if the value is `listbox`
      expect(textbox).not.to.have.attribute('aria-haspopup');

      // reflected aria-multiline has to be false i.e. not present or false
      expect(textbox).not.to.have.attribute('aria-multiline');
      expect(textbox).to.have.attribute('aria-autocomplete', 'list');
      expect(textbox, 'no option is focused when opened').not.to.have.attribute(
        'aria-activedescendant',
      );

      // listbox is not only inaccessible but not in the DOM
      const listbox = queryByRole('listbox', { hidden: true });
      expect(listbox).to.equal(null);

      const buttons = getAllByRole('button', { hidden: true });

      expect(buttons[0]).toHaveAccessibleName('Open');
      expect(buttons[0]).to.have.attribute('title', 'Open');
      expect(buttons).to.have.length(1);
      expect(buttons[0], 'button is not in tab order').to.have.property('tabIndex', -1);
    });

    specify('when open', () => {
      const { getAllByRole, getByRole } = render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      const textbox = getByRole('combobox');
      expect(textbox).to.have.attribute('aria-expanded', 'true');

      const listbox = getByRole('listbox');
      expect(listbox.tagName.toLowerCase()).to.equal('ul');
      expect(textbox).to.have.attribute('aria-controls', listbox.getAttribute('id'));
      expect(textbox, 'no option is focused when opened').not.to.have.attribute(
        'aria-activedescendant',
      );

      const options = getAllByRole('option');
      expect(options).to.have.length(2);
      options.forEach((option) => {
        expect(listbox).to.contain(option);
      });

      const buttons = getAllByRole('button', { hidden: true });
      expect(buttons[0]).toHaveAccessibleName('Close');
      expect(buttons[0]).to.have.attribute('title', 'Close');
      expect(buttons).to.have.length(1);
      expect(buttons[0], 'button is not in tab order').to.have.property('tabIndex', -1);
    });

    it('should add and remove aria-activedescendant', () => {
      const { getAllByRole, getByRole, setProps } = render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');
      expect(textbox, 'no option is focused when opened').not.to.have.attribute(
        'aria-activedescendant',
      );
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });

      const options = getAllByRole('option');
      expect(textbox).to.have.attribute('aria-activedescendant', options[0].getAttribute('id'));
      setProps({ open: false });
      expect(textbox, 'no option is focused when opened').not.to.have.attribute(
        'aria-activedescendant',
      );
    });
  });

  describe('when popup closed', () => {
    it('opens when the textbox is focused when `openOnFocus`', () => {
      const handleOpen = spy();
      render(
        <Autocomplete
          options={[]}
          onOpen={handleOpen}
          openOnFocus
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      expect(handleOpen.callCount).to.equal(1);
    });

    it('does not open on clear', () => {
      const handleOpen = spy();
      const handleChange = spy();
      const { container } = render(
        <Autocomplete
          onOpen={handleOpen}
          onChange={handleChange}
          open={false}
          options={['one', 'two']}
          value="one"
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      const clear = container.querySelector('button');
      fireEvent.click(clear);

      expect(handleOpen.callCount).to.equal(0);
      expect(handleChange.callCount).to.equal(1);
    });

    ['ArrowDown', 'ArrowUp'].forEach((key) => {
      it(`opens on ${key} when focus is on the textbox and \`openOnFocus\` without moving focus`, () => {
        const handleOpen = spy();
        render(
          <Autocomplete
            onOpen={handleOpen}
            open={false}
            openOnFocus
            options={[]}
            renderInput={(params) => <TextField {...params} autoFocus />}
          />,
        );
        const textbox = screen.getByRole('combobox');

        fireEvent.keyDown(textbox, { key });

        // first from focus
        expect(handleOpen.callCount).to.equal(2);
        expect(textbox).not.to.have.attribute('aria-activedescendant');
      });
    });

    it('should open popup when clicked on the root element', () => {
      const handleOpen = spy();
      const ref = React.createRef();
      render(
        <Autocomplete
          onOpen={handleOpen}
          options={['one']}
          renderInput={(params) => (
            <TextField {...params} InputProps={{ ...params.InputProps, ref }} />
          )}
        />,
      );

      fireEvent.mouseDown(ref.current);
      expect(handleOpen.callCount).to.equal(1);
    });

    it('does not clear the textbox on Escape', () => {
      const handleChange = spy();
      render(
        <Autocomplete
          onChange={handleChange}
          open={false}
          options={['one', 'two']}
          value="one"
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      fireEvent.keyDown(screen.getByRole('combobox'), { key: 'Escape' });

      expect(handleChange.callCount).to.equal(0);
    });
  });

  describe('prop: clearOnEscape', () => {
    it('should clear on escape', () => {
      const handleChange = spy();
      render(
        <Autocomplete
          onChange={handleChange}
          clearOnEscape
          multiple
          value={['one']}
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      fireEvent.keyDown(screen.getByRole('combobox'), { key: 'Escape' });
      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal([]);
    });
  });

  describe('prop: clearOnBlur', () => {
    it('should clear on blur', () => {
      render(
        <Autocomplete
          clearOnBlur
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      fireEvent.change(textbox, { target: { value: 'test' } });
      expect(document.activeElement.value).to.equal('test');
      act(() => {
        textbox.blur();
      });
      expect(textbox.value).to.equal('');
    });

    it('should not clear on blur', () => {
      render(
        <Autocomplete
          clearOnBlur={false}
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      fireEvent.change(textbox, { target: { value: 'test' } });
      expect(document.activeElement.value).to.equal('test');
      act(() => {
        textbox.blur();
      });
      expect(textbox.value).to.equal('test');
    });

    it('should not clear on blur with `multiple` enabled', () => {
      render(
        <Autocomplete
          multiple
          clearOnBlur={false}
          options={['one', 'two']}
          defaultValue={['one']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      fireEvent.change(textbox, { target: { value: 'test' } });
      expect(document.activeElement.value).to.equal('test');
      act(() => {
        textbox.blur();
      });
      expect(textbox.value).to.equal('test');
    });
  });

  describe('when popup open', () => {
    it('closes the popup if Escape is pressed ', () => {
      const handleClose = spy();
      render(
        <Autocomplete
          onClose={handleClose}
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      fireEvent.keyDown(screen.getByRole('combobox'), { key: 'Escape' });
      expect(handleClose.callCount).to.equal(1);
    });

    it('does not close the popup when option selected if Control is pressed', () => {
      const handleClose = spy();
      const { getAllByRole } = render(
        <Autocomplete
          onClose={handleClose}
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      const options = getAllByRole('option');
      fireEvent.click(options[0], { ctrlKey: true });
      expect(handleClose.callCount).to.equal(0);
    });

    it('does not close the popup when option selected if Meta is pressed', () => {
      const handleClose = spy();
      const { getAllByRole } = render(
        <Autocomplete
          onClose={handleClose}
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      const options = getAllByRole('option');
      fireEvent.click(options[0], { metaKey: true });
      expect(handleClose.callCount).to.equal(0);
    });

    it('moves focus to the first option on ArrowDown', () => {
      const { getAllByRole, getByRole } = render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      fireEvent.keyDown(screen.getByRole('combobox'), { key: 'ArrowDown' });
      expect(getByRole('combobox')).to.have.attribute(
        'aria-activedescendant',
        getAllByRole('option')[0].getAttribute('id'),
      );
    });

    it('moves focus to the last option on ArrowUp', () => {
      const { getAllByRole, getByRole } = render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      fireEvent.keyDown(screen.getByRole('combobox'), { key: 'ArrowUp' });
      const options = getAllByRole('option');
      expect(getByRole('combobox')).to.have.attribute(
        'aria-activedescendant',
        options[options.length - 1].getAttribute('id'),
      );
    });

    it('should ignore keydown event until the IME is confirmed', function test() {
      // TODO: Often times out in Firefox 78.
      // Is this slow because of testing-library or because of the implementation?
      this.timeout(4000);

      const { getByRole } = render(
        <Autocomplete
          open
          options={['가1', '가2']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');
      const listbox = getByRole('listbox');
      // Actual Behavior when "가" (Korean) is entered and press the arrow down key once on macOS/Chrome
      fireEvent.change(textbox, { target: { value: '가' } });
      fireEvent.keyDown(textbox, { key: 'ArrowDown', keyCode: 229 });
      fireEvent.keyDown(textbox, { key: 'ArrowDown', keyCode: 40 });

      checkHighlightIs(listbox, '가1');
    });
  });

  describe('prop: openOnFocus', () => {
    it('enables open on input focus', () => {
      const { getByRole } = render(
        <Autocomplete
          options={['one', 'two', 'three']}
          openOnFocus
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = getByRole('combobox');

      expect(textbox).to.have.attribute('aria-expanded', 'true');
      expect(textbox).toHaveFocus();

      fireEvent.mouseDown(textbox);
      fireEvent.click(textbox);
      expect(textbox).to.have.attribute('aria-expanded', 'false');

      act(() => {
        document.activeElement.blur();
      });

      expect(textbox).to.have.attribute('aria-expanded', 'false');
      expect(textbox).not.toHaveFocus();

      fireEvent.mouseDown(textbox);
      fireEvent.click(textbox);
      expect(textbox).to.have.attribute('aria-expanded', 'true');
      expect(textbox).toHaveFocus();

      fireEvent.mouseDown(textbox);
      fireEvent.click(textbox);
      expect(textbox).to.have.attribute('aria-expanded', 'false');
    });
  });

  describe('listbox wrapping behavior', () => {
    it('wraps around when navigating the list by default', () => {
      const { getAllByRole } = render(
        <Autocomplete
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowUp' });

      const options = getAllByRole('option');
      expect(textbox).toHaveFocus();
      expect(textbox).to.have.attribute(
        'aria-activedescendant',
        options[options.length - 1].getAttribute('id'),
      );
    });

    it('selects the first item if on the last item and pressing up by default', () => {
      render(
        <Autocomplete
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowUp' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });

      const options = screen.getAllByRole('option');
      expect(textbox).toHaveFocus();
      expect(textbox).to.have.attribute('aria-activedescendant', options[0].getAttribute('id'));
    });

    describe('prop: includeInputInList', () => {
      it('considers the textbox the predecessor of the first option when pressing Up', () => {
        render(
          <Autocomplete
            includeInputInList
            open
            options={['one', 'two', 'three']}
            renderInput={(params) => <TextField {...params} autoFocus />}
          />,
        );
        const textbox = screen.getByRole('combobox');

        fireEvent.keyDown(textbox, { key: 'ArrowDown' });
        fireEvent.keyDown(textbox, { key: 'ArrowUp' });

        expect(textbox).toHaveFocus();
        expect(textbox).not.to.have.attribute('aria-activedescendant');
      });

      it('considers the textbox the successor of the last option when pressing Down', () => {
        render(
          <Autocomplete
            includeInputInList
            open
            options={['one', 'two', 'three']}
            renderInput={(params) => <TextField {...params} autoFocus />}
          />,
        );
        const textbox = screen.getByRole('combobox');

        fireEvent.keyDown(textbox, { key: 'ArrowUp' });
        fireEvent.keyDown(textbox, { key: 'ArrowDown' });

        expect(textbox).toHaveFocus();
        expect(textbox).not.to.have.attribute('aria-activedescendant');
      });
    });

    describe('prop: disableListWrap', () => {
      it('keeps focus on the first item if focus is on the first item and pressing Up', () => {
        render(
          <Autocomplete
            disableListWrap
            open
            options={['one', 'two', 'three']}
            renderInput={(params) => <TextField {...params} autoFocus />}
          />,
        );
        const textbox = screen.getByRole('combobox');

        fireEvent.keyDown(textbox, { key: 'ArrowDown' });
        fireEvent.keyDown(textbox, { key: 'ArrowUp' });

        expect(textbox).toHaveFocus();
        expect(textbox).to.have.attribute(
          'aria-activedescendant',
          screen.getAllByRole('option')[0].getAttribute('id'),
        );
      });

      it('focuses the last item when pressing Up when no option is active', () => {
        render(
          <Autocomplete
            disableListWrap
            open
            options={['one', 'two', 'three']}
            renderInput={(params) => <TextField {...params} autoFocus />}
          />,
        );
        const textbox = screen.getByRole('combobox');

        fireEvent.keyDown(textbox, { key: 'ArrowUp' });

        const options = screen.getAllByRole('option');
        expect(textbox).toHaveFocus();
        expect(textbox).to.have.attribute(
          'aria-activedescendant',
          options[options.length - 1].getAttribute('id'),
        );
      });

      it('keeps focus on the last item if focus is on the last item and pressing Down', () => {
        render(
          <Autocomplete
            disableListWrap
            open
            options={['one', 'two', 'three']}
            renderInput={(params) => <TextField {...params} autoFocus />}
          />,
        );
        const textbox = screen.getByRole('combobox');

        fireEvent.keyDown(textbox, { key: 'ArrowDown' });
        fireEvent.keyDown(textbox, { key: 'ArrowDown' });
        fireEvent.keyDown(textbox, { key: 'ArrowDown' });

        const options = screen.getAllByRole('option');
        expect(textbox).toHaveFocus();
        expect(textbox).to.have.attribute(
          'aria-activedescendant',
          options[options.length - 1].getAttribute('id'),
        );
      });
    });
  });

  describe('prop: disabled', () => {
    it('should disable the input', () => {
      const { getByRole } = render(
        <Autocomplete
          disabled
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const input = getByRole('combobox');
      expect(input).to.have.property('disabled', true);
    });

    it('should disable the popup button', () => {
      const { queryByTitle } = render(
        <Autocomplete
          disabled
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      expect(queryByTitle('Open').disabled).to.equal(true);
    });

    it('clicks should not toggle the listbox open state when disabled', () => {
      const { getByTestId, queryByRole } = render(
        <Autocomplete
          disabled
          options={['one', 'two', 'three']}
          renderInput={(params) => (
            <TextField
              {...params}
              InputProps={{
                ...params.InputProps,
                'data-testid': 'test-input-root',
              }}
            />
          )}
        />,
      );
      const textbox = queryByRole('combobox');
      const listbox = queryByRole('listbox', { hidden: true });

      expect(textbox).to.have.attribute('aria-expanded', 'false');
      expect(listbox).to.equal(null);

      const inputBase = getByTestId('test-input-root');
      fireEvent.click(inputBase);

      expect(textbox).to.have.attribute('aria-expanded', 'false');
      expect(listbox).to.equal(null);
    });

    it('mouseup should not toggle the listbox open state when disabled', async () => {
      const { container, queryByRole } = render(
        <Autocomplete
          disabled
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      const textbox = queryByRole('combobox');
      const listbox = queryByRole('listbox', { hidden: true });

      expect(textbox).to.have.attribute('aria-expanded', 'false');
      expect(listbox).to.equal(null);

      // userEvent will fail at releasing MouseLeft if we target the
      // <button> since it has "pointer-events: none"
      const popupIndicator = container.querySelector(`.${classes.endAdornment}`);

      const user = userEvent.setup();

      await user.pointer([
        // this sequence does not work with fireEvent
        // 1. point the cursor somewhere in the textbox and hold down MouseLeft
        { keys: '[MouseLeft>]', target: textbox },
        // 2. move the cursor over the popupIndicator
        { pointerName: 'mouse', target: popupIndicator },
        // 3. release MouseLeft
        { keys: '[/MouseLeft]' },
      ]);

      expect(textbox).to.have.attribute('aria-expanded', 'false');
      expect(listbox).to.equal(null);
    });

    it('should not render the clear button', () => {
      const { queryByTitle } = render(
        <Autocomplete
          disabled
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      expect(queryByTitle('Clear')).to.equal(null);
    });

    it('should not apply the hasClearIcon class', () => {
      const { container } = render(
        <Autocomplete
          disabled
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      expect(container.querySelector(`.${classes.root}`)).not.to.have.class(classes.hasClearIcon);
      expect(container.querySelector(`.${classes.root}`)).to.have.class(classes.hasPopupIcon);
    });

    it('should close the popup when disabled is true', () => {
      const { setProps } = render(
        <Autocomplete
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      act(() => {
        textbox.focus();
      });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      expect(screen.queryByRole('listbox')).not.to.equal(null);
      setProps({ disabled: true });
      expect(screen.queryByRole('listbox')).to.equal(null);
    });

    it('should not crash when autoSelect & freeSolo are set, text is focused & disabled gets truthy', () => {
      const { setProps } = render(
        <Autocomplete
          autoSelect
          freeSolo
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
          value="one"
        />,
      );
      const textbox = screen.getByRole('combobox');
      act(() => {
        textbox.focus();
      });
      setProps({ disabled: true });
      expect(textbox).toBeVisible();
    });
  });

  describe('prop: disableClearable', () => {
    it('should not render the clear button', () => {
      const { queryByTitle, container } = render(
        <Autocomplete
          disableClearable
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      expect(queryByTitle('Clear')).to.equal(null);
      expect(container.querySelector(`.${classes.root}`)).to.have.class(classes.hasPopupIcon);
      expect(container.querySelector(`.${classes.root}`)).not.to.have.class(classes.hasClearIcon);
    });
  });

  describe('warnings', () => {
    beforeEach(() => {
      PropTypes.resetWarningCache();
    });

    it('warn if getOptionLabel do not return a string', () => {
      const handleChange = spy();
      render(
        <Autocomplete
          freeSolo
          onChange={handleChange}
          options={[{ name: 'one' }, {}]}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      expect(() => {
        fireEvent.change(textbox, { target: { value: 'a' } });
        fireEvent.keyDown(textbox, { key: 'Enter' });
      }).toErrorDev([
        'MUI: The `getOptionLabel` method of Autocomplete returned undefined instead of a string',
        !strictModeDoubleLoggingSuppressed &&
          'MUI: The `getOptionLabel` method of Autocomplete returned undefined instead of a string',
        !strictModeDoubleLoggingSuppressed &&
          'MUI: The `getOptionLabel` method of Autocomplete returned undefined instead of a string',
        'MUI: The `getOptionLabel` method of Autocomplete returned undefined instead of a string',
        'MUI: The `getOptionLabel` method of Autocomplete returned undefined instead of a string',
        'MUI: The `getOptionLabel` method of Autocomplete returned undefined instead of a string',
      ]);
      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.equal('a');
    });

    it('warn if isOptionEqualToValue match multiple values for a given option', () => {
      const value = [
        { id: '10', text: 'One' },
        { id: '20', text: 'Two' },
      ];
      const options = [
        { id: '10', text: 'One' },
        { id: '20', text: 'Two' },
        { id: '30', text: 'Three' },
      ];

      render(
        <Autocomplete
          multiple
          options={options}
          value={value}
          getOptionLabel={(option) => option.text}
          isOptionEqualToValue={(option) => value.find((v) => v.id === option.id)}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      expect(() => {
        fireEvent.keyDown(textbox, { key: 'ArrowDown' });
        fireEvent.keyDown(textbox, { key: 'Enter' });
      }).toErrorDev(
        'The component expects a single value to match a given option but found 2 matches.',
      );
    });

    it('warn if groups options are not sorted', () => {
      const data = [
        { group: 1, value: 'A' },
        { group: 2, value: 'D' },
        { group: 2, value: 'E' },
        { group: 1, value: 'B' },
        { group: 3, value: 'G' },
        { group: 2, value: 'F' },
        { group: 1, value: 'C' },
      ];
      expect(() => {
        render(
          <Autocomplete
            openOnFocus
            options={data}
            getOptionLabel={(option) => option.value}
            renderInput={(params) => <TextField {...params} autoFocus />}
            groupBy={(option) => option.group}
          />,
        );
      }).toWarnDev([
        'returns duplicated headers',
        !strictModeDoubleLoggingSuppressed && 'returns duplicated headers',
      ]);
      const options = screen.getAllByRole('option').map((el) => el.textContent);
      expect(options).to.have.length(7);
      expect(options).to.deep.equal(['A', 'D', 'E', 'B', 'G', 'F', 'C']);
    });

    it('warn if the type of the value is wrong', () => {
      expect(() => {
        PropTypes.checkPropTypes(
          Autocomplete.propTypes,
          { multiple: true, value: null, options: [], renderInput: () => null },
          'prop',
          'Autocomplete',
        );
      }).toErrorDev(
        'The Autocomplete expects the `value` prop to be an array when `multiple={true}` or undefined.',
      );
    });

    it('warn if the type of the defaultValue is wrong', () => {
      expect(() => {
        PropTypes.checkPropTypes(
          Autocomplete.propTypes,
          { multiple: true, defaultValue: 'wrong-string', options: [], renderInput: () => null },
          'prop',
          'Autocomplete',
        );
      }).toErrorDev(
        'The Autocomplete expects the `defaultValue` prop to be an array when `multiple={true}` or undefined.',
      );
    });
  });

  describe('prop: options', () => {
    it('should keep focus on selected option and not reset to top option when options updated', () => {
      const { setProps } = render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      const listbox = screen.getByRole('listbox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // goes to 'one'
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // goes to 'two'

      checkHighlightIs(listbox, 'two');

      // three option is added and autocomplete re-renders, restore the highlight
      setProps({ options: ['one', 'two', 'three'] });
      checkHighlightIs(listbox, 'two');
    });

    it('should keep focus when multiple options are selected and not reset to top option when options updated', () => {
      const { setProps } = render(
        <Autocomplete
          open
          multiple
          defaultValue={['one', 'two']}
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      const listbox = screen.getByRole('listbox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });

      checkHighlightIs(listbox, 'three');

      // fourth option is added and autocomplete re-renders, restore the highlight
      setProps({ options: ['one', 'two', 'three', 'four'] });
      checkHighlightIs(listbox, 'three');
    });

    it('should keep focus when multiple options are selected by not resetting to the top option when options are updated and when options are provided as objects', () => {
      const { setProps } = render(
        <Autocomplete
          open
          multiple
          defaultValue={[{ label: 'one' }]}
          isOptionEqualToValue={(option, value) => option.label === value.label}
          options={[{ label: 'one' }, { label: 'two' }, { label: 'three' }]}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      const listbox = screen.getByRole('listbox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });

      checkHighlightIs(listbox, 'three');

      // fourth option is added and autocomplete re-renders, restore the highlight
      setProps({
        options: [{ label: 'one' }, { label: 'two' }, { label: 'three' }, { label: 'four' }],
      });
      checkHighlightIs(listbox, 'three');
    });

    it('should keep focus on selected option when options updates and when options are provided as objects', () => {
      const { setProps } = render(
        <Autocomplete
          open
          options={[{ label: 'one' }, { label: 'two' }]}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      const listbox = screen.getByRole('listbox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // goes to 'one'
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // goes to 'two'

      checkHighlightIs(listbox, 'two');

      // zero and three options are added and autocomplete re-renders, restore the highlight
      setProps({
        options: [{ label: 'zero' }, { label: 'one' }, { label: 'two' }, { label: 'three' }],
      });
      checkHighlightIs(listbox, 'two');

      // check that the highlighted option is still in sync with the internal highlighted index
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // goes to 'three'
      checkHighlightIs(listbox, 'three');
    });

    it('should reset the highlight when the input changed', () => {
      const filterOptions = createFilterOptions({});
      render(
        <Autocomplete
          open
          autoFocus
          autoHighlight
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
          filterOptions={filterOptions}
        />,
      );
      const textbox = screen.getByRole('combobox');
      const listbox = screen.getByRole('listbox');

      fireEvent.change(textbox, { target: { value: 't' } });
      checkHighlightIs(listbox, 'two');

      fireEvent.change(textbox, { target: { value: '' } });
      checkHighlightIs(listbox, 'one');

      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(textbox).has.value('one');
    });

    it("should reset the highlight when previously highlighted option doesn't exists in new options", () => {
      const { setProps } = render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      const listbox = screen.getByRole('listbox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // goes to 'one'
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // goes to 'two'

      checkHighlightIs(listbox, 'two');

      // Options are updated and autocomplete re-renders; reset the highlight since two doesn't exist in the new options.
      setProps({ options: ['one', 'three', 'four'] });
      checkHighlightIs(listbox, null);
    });

    it('should not select undefined', () => {
      const handleChange = spy();
      const { getByRole } = render(
        <Autocomplete
          onChange={handleChange}
          openOnFocus
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const input = getByRole('combobox');
      fireEvent.click(input);

      const listbox = getByRole('listbox');
      const firstOption = listbox.querySelector('li');
      fireEvent.click(firstOption);

      expect(handleChange.args[0][1]).to.equal('one');
    });

    it('should work if options are the default data structure', () => {
      const options = [
        {
          label: 'one',
        },
      ];
      const handleChange = spy();
      const { getByRole } = render(
        <Autocomplete
          onChange={handleChange}
          openOnFocus
          options={options}
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      const input = getByRole('combobox');
      fireEvent.click(input);

      const listbox = getByRole('listbox');
      const htmlOptions = listbox.querySelectorAll('li');

      expect(htmlOptions[0].innerHTML).to.equal('one');
    });

    it("should display a 'no options' message if no options are available", () => {
      const { getByRole } = render(
        <Autocomplete open options={[]} renderInput={(params) => <TextField {...params} />} />,
      );

      const textbox = getByRole('combobox');
      expect(textbox).to.have.attribute('aria-expanded', 'false');
      expect(textbox).not.to.have.attribute('aria-controls');
      expect(document.querySelector(`.${classes.paper}`)).to.have.text('No options');
    });
  });

  describe('enter', () => {
    it('select a single value when enter is pressed', () => {
      const handleChange = spy();
      render(
        <Autocomplete
          onChange={handleChange}
          openOnFocus
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.equal('one');
      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(handleChange.callCount).to.equal(1);
    });

    it('select multiple value when enter is pressed', () => {
      const handleChange = spy();
      const options = [{ name: 'one' }, { name: 'two ' }];
      render(
        <Autocomplete
          multiple
          onChange={handleChange}
          openOnFocus
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal([options[0]]);
      fireEvent.keyDown(textbox, { key: 'Enter' });
      expect(handleChange.callCount).to.equal(1);
    });
  });

  describe('prop: autoComplete', () => {
    it('add a completion string', () => {
      render(
        <Autocomplete
          autoComplete
          openOnFocus
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.change(document.activeElement, { target: { value: 'O' } });

      expect(document.activeElement.value).to.equal('O');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });

      expect(document.activeElement.value).to.equal('one');
      expect(document.activeElement.selectionStart).to.equal(1);
      expect(document.activeElement.selectionEnd).to.equal(3);

      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(document.activeElement.value).to.equal('one');
      expect(document.activeElement.selectionStart).to.equal(3);
      expect(document.activeElement.selectionEnd).to.equal(3);
    });
  });

  describe('click input', () => {
    it('when `openOnFocus` toggles if empty', () => {
      const { getByRole } = render(
        <Autocomplete
          openOnFocus
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const textbox = getByRole('combobox');
      expect(textbox).to.have.attribute('aria-expanded', 'false');
      fireEvent.mouseDown(textbox);
      expect(textbox).to.have.attribute('aria-expanded', 'true');
      fireEvent.mouseDown(textbox);
      expect(textbox).to.have.attribute('aria-expanded', 'false');
    });

    it('selects all the first time', () => {
      const { getByRole } = render(
        <Autocomplete
          value="one"
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const textbox = getByRole('combobox');
      fireEvent.click(textbox);
      expect(textbox.selectionStart).to.equal(0);
      expect(textbox.selectionEnd).to.equal(3);
    });

    it('should focus the input when clicking on the open action', () => {
      const { getByRole, queryByTitle } = render(
        <Autocomplete
          value="one"
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      const textbox = getByRole('combobox');
      fireEvent.click(textbox);
      expect(textbox).toHaveFocus();

      act(() => {
        textbox.blur();
      });
      fireEvent.click(queryByTitle('Open'));

      expect(textbox).toHaveFocus();
    });

    it('should maintain list box open clicking on input when it is not empty', () => {
      const { getByRole, getAllByRole } = render(
        <Autocomplete options={['one']} renderInput={(params) => <TextField {...params} />} />,
      );

      const textbox = getByRole('combobox');

      expect(textbox).to.have.attribute('aria-expanded', 'false');
      fireEvent.mouseDown(textbox); // Open listbox
      expect(textbox).to.have.attribute('aria-expanded', 'true');
      const options = getAllByRole('option');
      fireEvent.click(options[0]);
      expect(textbox).to.have.attribute('aria-expanded', 'false');
      fireEvent.mouseDown(textbox); // Open listbox
      expect(textbox).to.have.attribute('aria-expanded', 'true');
      fireEvent.mouseDown(textbox); // Remain open listbox
      expect(textbox).to.have.attribute('aria-expanded', 'true');
    });

    it('should not toggle list box', () => {
      const { getByRole } = render(
        <Autocomplete
          value="one"
          options={['one']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const textbox = getByRole('combobox');

      expect(textbox).to.have.attribute('aria-expanded', 'false');
      fireEvent.mouseDown(textbox);
      expect(textbox).to.have.attribute('aria-expanded', 'true');
      fireEvent.mouseDown(textbox);
      expect(textbox).to.have.attribute('aria-expanded', 'true');
    });

    it('should not focus when tooltip clicked', () => {
      const { getByRole, getByText } = render(
        <Autocomplete
          options={['one', 'two', 'three']}
          renderInput={(params) => {
            return (
              <TextField
                {...params}
                InputProps={{
                  ...params.InputProps,
                  startAdornment: (
                    <InputAdornment position="end">
                      <Tooltip title="tooltip" open>
                        <div>ICON</div>
                      </Tooltip>
                    </InputAdornment>
                  ),
                }}
              />
            );
          }}
        />,
      );

      const textbox = getByRole('combobox');
      const tooltip = getByText('tooltip');

      act(() => {
        fireEvent.click(tooltip);
      });

      expect(textbox).not.toHaveFocus();
    });
  });

  describe('controlled', () => {
    it('controls the input value', () => {
      const handleChange = spy();
      function MyComponent() {
        const [, setInputValue] = React.useState('');
        const handleInputChange = (event, value) => {
          handleChange(value);
          setInputValue(value);
        };
        return (
          <Autocomplete
            options={[]}
            inputValue=""
            onInputChange={handleInputChange}
            renderInput={(params) => <TextField {...params} autoFocus />}
          />
        );
      }

      render(<MyComponent />);

      expect(handleChange.callCount).to.equal(0);
      fireEvent.change(document.activeElement, { target: { value: 'a' } });
      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][0]).to.equal('a');
      expect(document.activeElement.value).to.equal('');
    });

    it('should fire the input change event before the change event', () => {
      const handleChange = spy();
      const handleInputChange = spy();
      render(
        <Autocomplete
          onChange={handleChange}
          onInputChange={handleInputChange}
          open
          options={['foo']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(handleInputChange.calledBefore(handleChange)).to.equal(true);
    });
  });

  describe('prop: filterOptions', () => {
    it('should ignore object keys by default', () => {
      const { queryAllByRole } = render(
        <Autocomplete
          open
          options={[
            {
              value: 'one',
              label: 'One',
            },
            {
              value: 'two',
              label: 'Two',
            },
          ]}
          getOptionLabel={(option) => option.label}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      let options;
      options = queryAllByRole('option');
      expect(options.length).to.equal(2);

      fireEvent.change(document.activeElement, { target: { value: 'value' } });
      options = queryAllByRole('option');
      expect(options.length).to.equal(0);

      fireEvent.change(document.activeElement, { target: { value: 'one' } });
      options = queryAllByRole('option');
      expect(options.length).to.equal(1);
    });

    it('limits the amount of rendered options when `limit` is set in `createFilterOptions`', () => {
      const filterOptions = createFilterOptions({ limit: 2 });
      const { queryAllByRole } = render(
        <Autocomplete
          open
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
          filterOptions={filterOptions}
        />,
      );
      expect(queryAllByRole('option').length).to.equal(2);
    });

    it('does not limit the amount of rendered options when `limit` is not set in `createFilterOptions`', () => {
      const filterOptions = createFilterOptions({});
      const { queryAllByRole } = render(
        <Autocomplete
          open
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
          filterOptions={filterOptions}
        />,
      );
      expect(queryAllByRole('option').length).to.equal(3);
    });
  });

  describe('prop: freeSolo', () => {
    it('pressing twice enter should not call onChange listener twice', () => {
      const handleChange = spy();
      const options = [{ name: 'foo' }];
      render(
        <Autocomplete
          freeSolo
          onChange={handleChange}
          open
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal(options[0]);

      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(handleChange.callCount).to.equal(1);
    });

    it('should not delete exiting tag when try to add it twice', () => {
      const handleChange = spy();
      const options = ['one', 'two'];
      const { container } = render(
        <Autocomplete
          defaultValue={options}
          options={options}
          onChange={handleChange}
          freeSolo
          renderInput={(params) => <TextField {...params} autoFocus />}
          multiple
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.change(textbox, { target: { value: 'three' } });
      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(container.querySelectorAll('[class*="MuiChip-root"]')).to.have.length(3);

      fireEvent.change(textbox, { target: { value: 'three' } });
      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(container.querySelectorAll('[class*="MuiChip-root"]')).to.have.length(3);
    });

    it('should not fire change event until the IME is confirmed', () => {
      const handleChange = spy();
      render(
        <Autocomplete
          freeSolo
          onChange={handleChange}
          options={[]}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      // Actual behavior when "あ" (Japanese) is entered on macOS/Safari with IME
      fireEvent.change(textbox, { target: { value: 'あ' } });
      fireEvent.keyDown(textbox, { key: 'Enter', keyCode: 229 });

      expect(handleChange.callCount).to.equal(0);

      fireEvent.keyDown(textbox, { key: 'Enter', keyCode: 13 });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.equal('あ');
    });

    it('should render endAdornment only when clear icon or popup icon is available', () => {
      const { container } = render(
        <Autocomplete freeSolo options={[]} renderInput={(params) => <TextField {...params} />} />,
      );

      expect(container.querySelector(`.${classes.endAdornment}`)).to.equal(null);
    });
  });

  describe('prop: onChange', () => {
    it('provides a reason and details on option creation', () => {
      const handleChange = spy();
      const options = ['one', 'two', 'three'];
      render(
        <Autocomplete
          freeSolo
          onChange={handleChange}
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.change(textbox, { target: { value: options[2] } });
      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.equal(options[2]);
      expect(handleChange.args[0][2]).to.equal('createOption');
      expect(handleChange.args[0][3]).to.deep.equal({ option: options[2] });
    });

    it('provides a reason and details on option selection', () => {
      const handleChange = spy();
      const options = ['one', 'two', 'three'];
      render(
        <Autocomplete
          onChange={handleChange}
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'Enter' });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.equal(options[0]);
      expect(handleChange.args[0][2]).to.equal('selectOption');
      expect(handleChange.args[0][3]).to.deep.equal({ option: options[0] });
    });

    it('provides a reason and details on option removing', () => {
      const handleChange = spy();
      const options = ['one', 'two', 'three'];
      render(
        <Autocomplete
          multiple
          onChange={handleChange}
          value={options}
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'Backspace' });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal(options.slice(0, 2));
      expect(handleChange.args[0][2]).to.equal('removeOption');
      expect(handleChange.args[0][3]).to.deep.equal({ option: options[2] });
    });

    it('provides a reason and details on blur', () => {
      const handleChange = spy();
      const options = ['one', 'two', 'three'];
      render(
        <Autocomplete
          autoSelect
          onChange={handleChange}
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      act(() => {
        textbox.blur();
      });

      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.equal(options[0]);
      expect(handleChange.args[0][2]).to.equal('blur');
      expect(handleChange.args[0][3]).to.deep.equal({ option: options[0] });
    });

    it('provides a reason and details on clear', () => {
      const handleChange = spy();
      const options = ['one', 'two', 'three'];
      const { container } = render(
        <Autocomplete
          multiple
          value={options}
          onChange={handleChange}
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      const button = container.querySelector('button');
      fireEvent.click(button);
      expect(handleChange.callCount).to.equal(1);
      expect(handleChange.args[0][1]).to.deep.equal([]);
      expect(handleChange.args[0][2]).to.equal('clear');
      expect(handleChange.args[0][3]).to.equal(undefined);
    });
  });

  describe('prop: onInputChange', () => {
    it('provides a reason on input change', async () => {
      const handleInputChange = spy();
      const options = [{ name: 'foo' }];
      const { user } = render(
        <Autocomplete
          onInputChange={handleInputChange}
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      await user.type(document.activeElement, 'a');

      expect(handleInputChange.callCount).to.equal(1);
      expect(handleInputChange.args[0][1]).to.equal('a');
      expect(handleInputChange.args[0][2]).to.equal('input');
    });

    it('provides a reason on select reset', async () => {
      const handleInputChange = spy();
      const options = [{ name: 'foo' }, { name: 'bar' }];
      function MyComponent() {
        const [value, setValue] = React.useState(options[0]);
        return (
          <React.Fragment>
            <Autocomplete
              onInputChange={handleInputChange}
              openOnFocus
              options={options}
              getOptionLabel={(option) => option.name}
              renderInput={(params) => <TextField {...params} autoFocus />}
              value={value}
            />
            <button onClick={() => setValue(options[1])} type="button">
              Reset
            </button>
          </React.Fragment>
        );
      }
      const { user } = render(<MyComponent />);

      await user.click(screen.getByText('Reset'));

      expect(handleInputChange.lastCall.args[1]).to.equal(options[1].name);
      expect(handleInputChange.lastCall.args[2]).to.equal('reset');
    });

    it('provides a reason on clear', async () => {
      const handleInputChange = spy();
      const options = [{ name: 'foo' }];
      const { user } = render(
        <Autocomplete
          onInputChange={handleInputChange}
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
          defaultValue={options[0]}
        />,
      );

      await user.click(screen.getByLabelText('Clear'));

      expect(handleInputChange.lastCall.args[1]).to.equal('');
      expect(handleInputChange.lastCall.args[2]).to.equal('clear');
    });

    it('provides a reason on blur', async () => {
      const handleInputChange = spy();
      const options = [{ name: 'foo' }];
      const { user } = render(
        <Autocomplete
          onInputChange={handleInputChange}
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
          clearOnBlur
        />,
      );

      await user.type(screen.getByRole('combobox'), options[0].name);
      await user.tab();

      expect(handleInputChange.lastCall.args[1]).to.equal('');
      expect(handleInputChange.lastCall.args[2]).to.equal('blur');
    });

    it('provides a reason on select option', async () => {
      const handleInputChange = spy();
      const options = [{ name: 'foo' }];
      const { user } = render(
        <Autocomplete
          onInputChange={handleInputChange}
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      await user.click(screen.getByLabelText('Open'));
      await user.click(screen.getByRole('option', { name: options[0].name }));

      expect(handleInputChange.lastCall.args[1]).to.equal(options[0].name);
      expect(handleInputChange.lastCall.args[2]).to.equal('selectOption');
    });

    it('provides a reason on remove option', async () => {
      const handleInputChange = spy();
      const options = [{ name: 'foo' }];
      const { user } = render(
        <Autocomplete
          onInputChange={handleInputChange}
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
          defaultValue={options}
          multiple
        />,
      );

      await user.type(screen.getByRole('combobox'), `${options[0].name}{Enter}`);

      expect(handleInputChange.lastCall.args[1]).to.equal('');
      expect(handleInputChange.lastCall.args[2]).to.equal('removeOption');
    });
  });

  describe('prop: blurOnSelect', () => {
    it('[blurOnSelect=true] should blur the input when clicking or touching options', () => {
      const options = [{ name: 'foo' }];
      const { getByRole, queryByTitle } = render(
        <Autocomplete
          openOnFocus
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
          blurOnSelect
        />,
      );
      const textbox = getByRole('combobox');
      let firstOption = getByRole('option');
      expect(textbox).toHaveFocus();
      fireEvent.click(firstOption);
      expect(textbox).not.toHaveFocus();

      fireEvent.click(queryByTitle('Open'));
      expect(textbox).toHaveFocus();
      firstOption = getByRole('option');
      fireEvent.touchStart(firstOption);
      fireEvent.click(firstOption);
      expect(textbox).not.toHaveFocus();
    });

    it('[blurOnSelect="touch"] should only blur the input when an option is touched', () => {
      const options = [{ name: 'foo' }];
      const { getByRole, queryByTitle } = render(
        <Autocomplete
          openOnFocus
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
          blurOnSelect="touch"
        />,
      );
      const textbox = getByRole('combobox');
      let firstOption = getByRole('option');
      fireEvent.click(firstOption);
      expect(textbox).toHaveFocus();

      fireEvent.click(queryByTitle('Open'));
      firstOption = getByRole('option');
      fireEvent.touchStart(firstOption);
      fireEvent.click(firstOption);
      expect(textbox).not.toHaveFocus();
    });

    it('[blurOnSelect="mouse"] should only blur the input when an option is clicked', () => {
      const options = [{ name: 'foo' }];
      const { getByRole, queryByTitle } = render(
        <Autocomplete
          openOnFocus
          options={options}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
          blurOnSelect="mouse"
        />,
      );
      const textbox = getByRole('combobox');
      let firstOption = getByRole('option');
      fireEvent.touchStart(firstOption);
      fireEvent.click(firstOption);
      expect(textbox).toHaveFocus();

      fireEvent.click(queryByTitle('Open'));
      firstOption = getByRole('option');
      fireEvent.click(firstOption);
      expect(textbox).not.toHaveFocus();
    });
  });

  describe('prop: getOptionLabel', () => {
    it('is considered for falsy values when filtering the list of options', () => {
      const { getAllByRole } = render(
        <Autocomplete
          open
          options={[0, 10, 20]}
          getOptionLabel={(option) => (option === 0 ? 'Any' : option.toString())}
          renderInput={(params) => <TextField {...params} />}
          value={0}
        />,
      );

      const options = getAllByRole('option');
      expect(options).to.have.length(3);
    });

    it('is not considered for nullish values when filtering the list of options', () => {
      const { getAllByRole } = render(
        <Autocomplete
          open
          options={[null, 10, 20]}
          getOptionLabel={(option) => (option === null ? 'Any' : option.toString())}
          renderInput={(params) => <TextField {...params} />}
          value={null}
        />,
      );

      const options = getAllByRole('option');
      expect(options).to.have.length(3);
    });

    it('should update the input value when getOptionLabel changes', () => {
      const { setProps } = render(
        <Autocomplete
          value="one"
          open
          options={['one', 'two', 'three']}
          getOptionLabel={(option) => option}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      expect(textbox).to.have.property('value', 'one');
      setProps({
        getOptionLabel: (option) => option.toUpperCase(),
      });
      expect(textbox).to.have.property('value', 'ONE');
    });

    it('should not update the input value when users is focusing', () => {
      const { setProps } = render(
        <Autocomplete
          value="one"
          open
          options={['one', 'two', 'three']}
          getOptionLabel={(option) => option}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      expect(textbox).to.have.property('value', 'one');
      fireEvent.change(textbox, { target: { value: 'a' } });
      setProps({
        getOptionLabel: (option) => option.toUpperCase(),
      });
      expect(textbox).to.have.property('value', 'a');
    });

    it('should not throw error when nested options are provided', () => {
      const { getByRole } = render(
        <Autocomplete
          openOnFocus
          autoHighlight
          options={[
            { property: { name: 'one' } },
            { property: { name: 'two' } },
            { property: { name: 'three' } },
          ]}
          getOptionLabel={(option) => option.property.name}
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      expect(() => {
        fireEvent.focus(getByRole('combobox'));
      }).not.to.throw();
    });
  });

  it('should specify option key for duplicate options', () => {
    const { getAllByRole } = render(
      <Autocomplete
        open
        options={[
          { name: 'one', id: '1' },
          { name: 'two', id: '2' },
          { name: 'three', id: '3' },
          { name: 'three', id: '4' },
        ]}
        getOptionLabel={(option) => option.name}
        getOptionKey={(option) => option.id}
        renderInput={(params) => <TextField {...params} autoFocus />}
      />,
    );

    fireEvent.change(document.activeElement, { target: { value: 'th' } });
    const options = getAllByRole('option');
    expect(options.length).to.equal(2);
  });

  describe('prop: fullWidth', () => {
    it('should have the fullWidth class', () => {
      const { container } = render(
        <Autocomplete
          fullWidth
          options={[0, 10, 20]}
          renderInput={(params) => <TextField {...params} />}
          value={null}
        />,
      );

      expect(container.querySelector(`.${classes.root}`)).to.have.class(classes.fullWidth);
    });
  });

  it('should not override internal listbox ref when external listbox ref is provided', () => {
    const handleHighlightChange = spy();
    const options = ['one', 'two', 'three'];
    const ref = React.createRef(null);
    render(
      <Autocomplete
        defaultValue={options[0]}
        onHighlightChange={handleHighlightChange}
        options={options}
        ListboxProps={{ ref }}
        open
        renderInput={(params) => <TextField {...params} autoFocus />}
      />,
    );
    expect(handleHighlightChange.callCount).to.equal(
      // FIXME: highlighted index implementation should be implemented using React not the DOM.
      reactMajor > 18 ? 2 : 1,
    );
    expect(handleHighlightChange.args[0]).to.deep.equal([undefined, options[0], 'auto']);
    if (reactMajor > 18) {
      expect(handleHighlightChange.args[1]).to.deep.equal([undefined, options[0], 'auto']);
    }
  });

  describe('prop: onHighlightChange', () => {
    it('should trigger event when default value is passed', () => {
      const handleHighlightChange = spy();
      const options = ['one', 'two', 'three'];
      render(
        <Autocomplete
          defaultValue={options[0]}
          onHighlightChange={handleHighlightChange}
          options={options}
          open
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      expect(handleHighlightChange.callCount).to.equal(
        // FIXME: highlighted index implementation should be implemented using React not the DOM.
        reactMajor > 18 ? 2 : 1,
      );
      expect(handleHighlightChange.args[0]).to.deep.equal([undefined, options[0], 'auto']);
      if (reactMajor > 18) {
        expect(handleHighlightChange.args[1]).to.deep.equal([undefined, options[0], 'auto']);
      }
    });

    it('should support keyboard event', () => {
      const handleHighlightChange = spy();
      const options = ['one', 'two', 'three'];
      render(
        <Autocomplete
          onHighlightChange={handleHighlightChange}
          options={options}
          open
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });

      expect(handleHighlightChange.callCount).to.equal(
        // FIXME: highlighted index implementation should be implemented using React not the DOM.
        reactMajor >= 18 ? 4 : 3,
      );
      if (reactMajor >= 18) {
        expect(handleHighlightChange.args[2][0]).to.equal(undefined);
        expect(handleHighlightChange.args[2][1]).to.equal(null);
        expect(handleHighlightChange.args[2][2]).to.equal('auto');
      }
      expect(handleHighlightChange.lastCall.args[0]).not.to.equal(undefined);
      expect(handleHighlightChange.lastCall.args[1]).to.equal(options[0]);
      expect(handleHighlightChange.lastCall.args[2]).to.equal('keyboard');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      expect(handleHighlightChange.callCount).to.equal(
        // FIXME: highlighted index implementation should be implemented using React not the DOM.
        reactMajor >= 18 ? 5 : 4,
      );
      expect(handleHighlightChange.lastCall.args[0]).not.to.equal(undefined);
      expect(handleHighlightChange.lastCall.args[1]).to.equal(options[1]);
      expect(handleHighlightChange.lastCall.args[2]).to.equal('keyboard');
    });

    it('should support mouse event', () => {
      const handleHighlightChange = spy();
      const options = ['one', 'two', 'three'];
      const { getAllByRole } = render(
        <Autocomplete
          onHighlightChange={handleHighlightChange}
          options={options}
          open
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const firstOption = getAllByRole('option')[0];
      fireEvent.mouseMove(firstOption);
      expect(handleHighlightChange.callCount).to.equal(
        // FIXME: highlighted index implementation should be implemented using React not the DOM.
        reactMajor >= 18 ? 4 : 3,
      );
      if (reactMajor >= 18) {
        expect(handleHighlightChange.args[2][0]).to.equal(undefined);
        expect(handleHighlightChange.args[2][1]).to.equal(null);
        expect(handleHighlightChange.args[2][2]).to.equal('auto');
      }
      expect(handleHighlightChange.lastCall.args[0]).not.to.equal(undefined);
      expect(handleHighlightChange.lastCall.args[1]).to.equal(options[0]);
      expect(handleHighlightChange.lastCall.args[2]).to.equal('mouse');
    });

    it('should pass to onHighlightChange the correct value after filtering', () => {
      const handleHighlightChange = spy();
      const options = ['one', 'three', 'onetwo'];
      render(
        <Autocomplete
          onHighlightChange={handleHighlightChange}
          options={options}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );
      const textbox = screen.getByRole('combobox');

      fireEvent.change(document.activeElement, { target: { value: 'one' } });
      expect(screen.getAllByRole('option').length).to.equal(2);

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      expect(handleHighlightChange.args[handleHighlightChange.args.length - 1][1]).to.equal(
        options[2],
      );
    });

    it('should reset the highlight when the options change', () => {
      const handleHighlightChange = [];
      const { getByRole, setProps } = render(
        <Autocomplete
          onHighlightChange={(event, option) => {
            handleHighlightChange.push(option);
          }}
          openOnFocus
          autoHighlight
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      checkHighlightIs(getByRole('listbox'), 'one');
      setProps({ options: ['four', 'five'] });
      checkHighlightIs(getByRole('listbox'), 'four');

      const expectedCallHistory =
        reactMajor >= 19 ? [null, 'one', 'one', 'four'] : [null, 'one', 'four'];

      expect(handleHighlightChange).to.deep.equal(expectedCallHistory);
    });
  });

  it('should filter options when new input value matches option', () => {
    const handleChange = spy();
    const { getAllByRole, getByRole } = render(
      <Autocomplete
        openOnFocus
        options={['one', 'two']}
        onChange={handleChange}
        renderInput={(params) => <TextField autoFocus {...params} />}
      />,
    );
    const textbox = getByRole('combobox');

    fireEvent.change(textbox, { target: { value: 'one' } });
    fireEvent.keyDown(textbox, { key: 'ArrowDown' });
    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleChange.callCount).to.equal(1);
    expect(handleChange.args[0][1]).to.deep.equal('one');
    expect(textbox).to.have.attribute('aria-expanded', 'false');

    fireEvent.keyDown(textbox, { key: 'ArrowDown' });
    expect(textbox).to.have.attribute('aria-expanded', 'true');

    expect(getAllByRole('option')).to.have.length(2);

    fireEvent.change(textbox, { target: { value: 'on' } });
    fireEvent.change(textbox, { target: { value: 'one' } });

    expect(getAllByRole('option')).to.have.length(1);
  });

  it('should prevent the default event handlers', () => {
    const handleChange = spy();
    const handleSubmit = spy();
    function Test() {
      return (
        <div
          onKeyDown={(event) => {
            if (!event.defaultPrevented && event.key === 'Enter') {
              handleSubmit();
            }
          }}
        >
          <Autocomplete
            options={['one', 'two']}
            onChange={handleChange}
            onKeyDown={(event) => {
              if (event.key === 'Enter') {
                event.defaultMuiPrevented = true;
              }
            }}
            renderInput={(params) => <TextField autoFocus {...params} />}
          />
        </div>
      );
    }
    render(<Test />);
    const textbox = screen.getByRole('combobox');
    fireEvent.keyDown(textbox, { key: 'ArrowDown' });
    fireEvent.keyDown(textbox, { key: 'ArrowDown' });
    fireEvent.keyDown(textbox, { key: 'Enter' });
    expect(handleChange.callCount).to.equal(0);
    expect(handleSubmit.callCount).to.equal(1);
  });

  describe('prop: componentsProps', () => {
    it('should apply the props on the AutocompleteClearIndicator component', () => {
      render(
        <Autocomplete
          open
          options={['one', 'two']}
          value="one"
          renderInput={(params) => <TextField {...params} />}
          componentsProps={{
            clearIndicator: {
              'data-testid': 'clearIndicator',
              size: 'large',
              className: 'my-class',
            },
          }}
        />,
      );

      const clearIndicator = screen.getByTestId('clearIndicator');
      expect(clearIndicator).to.have.class(iconButtonClasses.sizeLarge);
      expect(clearIndicator).to.have.class('my-class');
    });

    it('should apply the props on the Paper component', () => {
      render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
          componentsProps={{
            paper: { 'data-testid': 'paperRoot', elevation: 2, className: 'my-class' },
          }}
        />,
      );

      const paperRoot = screen.getByTestId('paperRoot');
      expect(paperRoot).to.have.class(paperClasses.elevation2);
      expect(paperRoot).to.have.class('my-class');
    });

    it('should apply the props on the Popper component', () => {
      render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
          componentsProps={{
            popper: { 'data-testid': 'popperRoot', placement: 'bottom-end', className: 'my-class' },
          }}
        />,
      );

      const popperRoot = screen.getByTestId('popperRoot');
      expect(popperRoot).to.have.attribute('data-popper-placement', 'bottom-end');
      expect(popperRoot).to.have.class('my-class');
    });

    it('should apply the props on the AutocompletePopupIndicator component', () => {
      render(
        <Autocomplete
          open
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
          componentsProps={{
            popupIndicator: {
              'data-testid': 'popupIndicator',
              size: 'large',
              className: 'my-class',
            },
          }}
        />,
      );

      const popupIndicator = screen.getByTestId('popupIndicator');
      expect(popupIndicator).to.have.class(iconButtonClasses.sizeLarge);
      expect(popupIndicator).to.have.class('my-class');
    });

    it('should keep AutocompletePopper mounted if keepMounted is true in popper props', () => {
      // Autocomplete is not opened
      render(
        <Autocomplete
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
          componentsProps={{
            popper: { 'data-testid': 'popperRoot', keepMounted: true },
          }}
        />,
      );

      const popperRoot = screen.getByTestId('popperRoot');
      expect(popperRoot.style.display).to.equal('none');
    });
  });

  describe('prop: readOnly', () => {
    it('should make the input readonly', () => {
      render(
        <Autocomplete
          readOnly
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const input = screen.getByRole('combobox');
      expect(input).to.have.attribute('readonly');
    });

    it('should not render the clear button', () => {
      render(
        <Autocomplete
          readOnly
          defaultValue="one"
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      expect(screen.queryByTitle('Clear')).to.equal(null);
    });

    it('should not apply the hasClearIcon class', () => {
      const { container } = render(
        <Autocomplete
          readOnly
          defaultValue="one"
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      expect(container.querySelector(`.${classes.root}`)).not.to.have.class(classes.hasClearIcon);
      expect(container.querySelector(`.${classes.root}`)).to.have.class(classes.hasPopupIcon);
    });

    it('should focus on input when clicked', () => {
      render(
        <Autocomplete
          readOnly
          defaultValue="one"
          options={['one', 'two']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      const textbox = screen.getByRole('combobox');
      fireEvent.click(textbox);
      expect(textbox).toHaveFocus();

      act(() => {
        textbox.blur();
      });
      fireEvent.click(screen.queryByTitle('Open'));

      expect(textbox).toHaveFocus();
    });

    it('should not open the popup', () => {
      render(
        <Autocomplete
          readOnly
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );
      const textbox = screen.getByRole('combobox');
      fireEvent.mouseDown(textbox);
      expect(screen.queryByRole('listbox')).to.equal(null);
    });

    it('should not be able to delete the tag when multiple=true', () => {
      const { container } = render(
        <Autocomplete
          readOnly
          multiple
          defaultValue={['one', 'two']}
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} />}
        />,
      );

      const chip = container.querySelector(`.${chipClasses.root}`);
      expect(chip).not.to.have.class(chipClasses.deletable);

      const textbox = screen.getByRole('combobox');
      act(() => {
        textbox.focus();
      });
      expect(container.querySelectorAll(`.${chipClasses.root}`)).to.have.length(2);
      fireEvent.keyDown(textbox, { key: 'Backspace' });
      expect(container.querySelectorAll(`.${chipClasses.root}`)).to.have.length(2);
    });
  });

  // https://github.com/mui/material-ui/issues/36114
  describe('deleting a tag immediately after adding it while the listbox is still open', () => {
    it('should allow it, given that options are primitive values', () => {
      const { container } = render(
        <Autocomplete
          multiple
          disableCloseOnSelect
          filterSelectedOptions
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // highlight the first option...
      fireEvent.keyDown(textbox, { key: 'Enter' }); // ...and select it

      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // highlight another option

      expect(container.querySelectorAll(`.${chipClasses.root}`)).to.have.length(1);

      fireEvent.keyDown(textbox, { key: 'Backspace' });
      expect(container.querySelectorAll(`.${chipClasses.root}`)).to.have.length(0);
    });

    it('should allow it, given that options are objects', () => {
      const { container } = render(
        <Autocomplete
          multiple
          disableCloseOnSelect
          filterSelectedOptions
          options={[{ label: 'one' }, { label: 'two' }, { label: 'three' }]}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      const textbox = screen.getByRole('combobox');

      fireEvent.keyDown(textbox, { key: 'ArrowDown' });
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // highlight the first option...
      fireEvent.keyDown(textbox, { key: 'Enter' }); // ...and select it

      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // highlight another option

      expect(container.querySelectorAll(`.${chipClasses.root}`)).to.have.length(1);

      fireEvent.keyDown(textbox, { key: 'Backspace' });
      expect(container.querySelectorAll(`.${chipClasses.root}`)).to.have.length(0);
    });
  });

  describe('should apply the expanded class', () => {
    it('when listbox having options is opened', () => {
      const { container } = render(
        <Autocomplete
          options={['one', 'two', 'three']}
          renderInput={(params) => <TextField {...params} autoFocus />}
        />,
      );

      const root = container.querySelector(`.${classes.root}`);

      expect(root).not.to.have.class(classes.expanded);

      const textbox = screen.getByRole('combobox');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // open listbox

      expect(root).to.have.class(classes.expanded);
    });

    it('when listbox having no options is opened', () => {
      const { container } = render(
        <Autocomplete options={[]} renderInput={(params) => <TextField {...params} autoFocus />} />,
      );

      const root = container.querySelector(`.${classes.root}`);

      expect(root).not.to.have.class(classes.expanded);

      const textbox = screen.getByRole('combobox');
      fireEvent.keyDown(textbox, { key: 'ArrowDown' }); // open listbox

      expect(root).to.have.class(classes.expanded);
    });
  });

  describe('prop: renderOption', () => {
    it('should pass getOptionLabel through ownerState in renderOption callback', () => {
      render(
        <Autocomplete
          open
          options={[{ name: 'Max' }]}
          getOptionLabel={(option) => option.name}
          renderInput={(params) => <TextField {...params} autoFocus />}
          renderOption={(props, option, optionState, ownerState) => (
            <li key={option.name} data-testid="optionLi">
              {ownerState.getOptionLabel(option)}
            </li>
          )}
        />,
      );

      const renderedOption = screen.getByTestId('optionLi');
      expect(renderedOption).to.have.text('Max');
    });

    // https://github.com/mui/material-ui/issues/38048
    it('should pass getOptionLabel default value through ownerState when no custom getOptionLabel prop provided', () => {
      render(
        <Autocomplete
          open
          options={[{ label: 'Max' }]}
          renderInput={(params) => <TextField {...params} autoFocus />}
          renderOption={(props, option, optionState, ownerState) => (
            <li key={option.label} data-testid="optionLi">
              {ownerState.getOptionLabel(option)}
            </li>
          )}
        />,
      );

      const renderedOption = screen.getByTestId('optionLi');
      expect(renderedOption).to.have.text('Max');
    });
  });

  // https://github.com/mui/material-ui/issues/36212
  it('should preserve scrollTop position of the listbox when adding new options on mobile', function test() {
    if (/jsdom/.test(window.navigator.userAgent)) {
      this.skip();
    }
    function getOptions(count) {
      return Array(count)
        .fill('item')
        .map((value, i) => value + i);
    }

    const { getByRole, getAllByRole, setProps } = render(
      <Autocomplete
        open
        options={getOptions(5)}
        renderInput={(params) => <TextField {...params} />}
        ListboxProps={{ style: { maxHeight: '100px' } }}
      />,
    );
    const listbox = getByRole('listbox');

    expect(listbox).to.have.property('scrollTop', 0);

    const options = getAllByRole('option');
    act(() => {
      fireEvent.touchStart(options[1]);
      listbox.scrollBy(0, 60);
      setProps({ options: getOptions(10) });
    });

    expect(listbox).to.have.property('scrollTop', 60);
  });
});