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index.ts
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/**
* Internal dependencies
*/
import TokenList from '../';
describe( 'token-list', () => {
describe( 'constructor', () => {
it( 'should instantiate instance with no initial value', () => {
const list = new TokenList();
expect( list.value ).toBe( '' );
expect( list ).toHaveLength( 0 );
} );
it( 'should instantiate instance with empty initial value', () => {
const list = new TokenList( '' );
expect( list.value ).toBe( '' );
expect( list ).toHaveLength( 0 );
} );
it( 'should instantiate instance with initial value', () => {
const list = new TokenList( 'abc ' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
} );
describe( 'array method inheritence', () => {
it( 'entries', () => {
const list = new TokenList( 'abc ' );
expect( [ ...list.entries() ] ).toEqual( [ [ 0, 'abc' ] ] );
} );
it( 'forEach', () => {
expect.assertions( 1 );
const list = new TokenList( 'abc ' );
list.forEach( ( item ) => expect( item ).toBe( 'abc' ) );
} );
it( 'values', () => {
const list = new TokenList( 'abc ' );
expect( [ ...list.values() ] ).toEqual( [ 'abc' ] );
} );
it( 'keys', () => {
const list = new TokenList( 'abc ' );
expect( [ ...list.keys() ] ).toEqual( [ 0 ] );
} );
} );
} );
describe( 'value', () => {
it( 'gets the stringified value', () => {
const list = new TokenList( 'abc ' );
expect( list.value ).toBe( 'abc' );
} );
it( 'sets to stringified value', () => {
const list = new TokenList();
// @ts-expect-error The value should be a string, for testing we pass a "bad" value.
list.value = undefined;
expect( list.value ).toBe( 'undefined' );
} );
it( 'is the stringifier of the instance', () => {
const list = new TokenList( 'abc ' );
expect( String( list ) ).toBe( 'abc' );
} );
} );
describe( 'Symbol.iterator', () => {
it( 'returns a generator', () => {
const list = new TokenList();
expect( list[ Symbol.iterator ]().next ).toEqual(
expect.any( Function )
);
} );
it( 'yields entries', () => {
expect.assertions( 2 );
const classes = [ 'abc', 'def' ];
const list = new TokenList( classes.join( ' ' ) );
let i = 0;
for ( const item of list ) {
expect( item ).toBe( classes[ i++ ] );
}
} );
} );
describe( 'item', () => {
it( 'should return undefined if item at index does not exist', () => {
const list = new TokenList();
expect( list.item( 0 ) ).toBeUndefined();
} );
it( 'should return item at index', () => {
const list = new TokenList( 'abc' );
expect( list.item( 0 ) ).toBe( 'abc' );
} );
} );
describe( 'contains', () => {
it( 'should return false if token does not exist', () => {
const list = new TokenList();
expect( list.contains( 'abc' ) ).toBe( false );
} );
it( 'should return true if token exists', () => {
const list = new TokenList( 'abc' );
expect( list.contains( 'abc' ) ).toBe( true );
} );
} );
describe( 'add', () => {
it( 'does nothing if token already exists', () => {
const list = new TokenList( 'abc' );
const returnValue = list.add( 'abc' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBeUndefined();
} );
it( 'does nothing if token already exists (whitespace variation)', () => {
const list = new TokenList( 'abc ' );
const returnValue = list.add( '' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBeUndefined();
} );
it( 'does not add an empty token', () => {
const list = new TokenList( 'abc' );
const returnValue = list.add( '' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBeUndefined();
} );
it( 'adds token to empty initial value', () => {
const list = new TokenList();
const returnValue = list.add( 'abc' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBeUndefined();
} );
it( 'adds token to non-empty initial value', () => {
const list = new TokenList( 'abc' );
const returnValue = list.add( 'def' );
expect( list.value ).toBe( 'abc def' );
expect( list ).toHaveLength( 2 );
expect( returnValue ).toBeUndefined();
} );
it( 'adds multiple tokens, uniquely', () => {
const list = new TokenList( 'abc' );
const returnValue = list.add( 'abc', 'def', 'ghi' );
expect( list.value ).toBe( 'abc def ghi' );
expect( list ).toHaveLength( 3 );
expect( returnValue ).toBeUndefined();
} );
} );
describe( 'remove', () => {
it( 'does nothing if token does not exist', () => {
const list = new TokenList( 'abc' );
const returnValue = list.remove( 'def' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBeUndefined();
} );
it( 'removes token', () => {
const list = new TokenList( 'abc def' );
const returnValue = list.remove( 'def' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBeUndefined();
} );
it( 'removes multiple tokens', () => {
const list = new TokenList( 'abc def' );
const returnValue = list.remove( 'abc', 'def' );
expect( list.value ).toBe( '' );
expect( list ).toHaveLength( 0 );
expect( returnValue ).toBeUndefined();
} );
} );
describe( 'replace', () => {
it( 'does nothing if token does not exist', () => {
const list = new TokenList( 'abc' );
const returnValue = list.replace( 'def', 'ghi' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBe( false );
} );
it( 'removes token', () => {
const list = new TokenList( 'abc def' );
const returnValue = list.replace( 'def', 'ghi' );
expect( list.value ).toBe( 'abc ghi' );
expect( list ).toHaveLength( 2 );
expect( returnValue ).toBe( true );
} );
} );
describe( 'supports', () => {
it( 'returns true', () => {
const list = new TokenList( 'abc def' );
expect( list.supports( 'does-not-matter' ) ).toBe( true );
} );
} );
describe( 'toggle', () => {
describe( 'without force', () => {
it( 'toggles off', () => {
const list = new TokenList( 'abc' );
const returnValue = list.toggle( 'abc' );
expect( list.value ).toBe( '' );
expect( list ).toHaveLength( 0 );
expect( returnValue ).toBe( false );
} );
it( 'toggles on', () => {
const list = new TokenList();
const returnValue = list.toggle( 'abc' );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBe( true );
} );
} );
describe( 'with force', () => {
it( 'toggles off', () => {
const list = new TokenList( 'abc' );
const returnValue = list.toggle( 'abc', false );
expect( list.value ).toBe( '' );
expect( list ).toHaveLength( 0 );
expect( returnValue ).toBe( false );
} );
it( 'toggles on', () => {
const list = new TokenList( 'abc' );
const returnValue = list.toggle( 'abc', true );
expect( list.value ).toBe( 'abc' );
expect( list ).toHaveLength( 1 );
expect( returnValue ).toBe( true );
} );
} );
} );
} );