[Button] Save some bytes on the production build

src/FlatButton/FlatButton.js

@@ -6,8 +6,10 @@ import EnhancedButton from '../internal/EnhancedButton';
 import FlatButtonLabel from './FlatButtonLabel';
 
 function validateLabel(props, propName, componentName) {
-  if (!props.children && !props.label && !props.icon) {
-    return new Error(`Required prop label or children or icon was not specified in ${componentName}.`);
+  if (process.env.NODE_ENV !== 'production') {
+    if (!props.children && !props.label && !props.icon) {
+      return new Error(`Required prop label or children or icon was not specified in ${componentName}.`);
+    }
   }
 }
 

src/FlatButton/FlatButton.spec.js

@@ -2,6 +2,7 @@
 import React from 'react';
 import {shallow} from 'enzyme';
 import {assert} from 'chai';
+import {stub} from 'sinon';
 import FlatButton from './FlatButton';
 import getMuiTheme from '../styles/getMuiTheme';
 import ActionAndroid from '../svg-icons/action/android';
@@ -148,4 +149,34 @@ describe('<FlatButton />', () => {
     assert.strictEqual(wrapper.node.props.focusRippleColor, 'yellow', 'should be yellow');
     assert.strictEqual(wrapper.node.props.touchRippleColor, 'yellow', 'should be yellow');
   });
+
+  describe('propTypes', () => {
+    let consoleStub;
+
+    beforeEach(() => {
+      consoleStub = stub(console, 'error');
+    });
+
+    afterEach(() => {
+      console.error.restore(); // eslint-disable-line no-console
+    });
+
+    it('should throw when using wrong properties', () => {
+      shallowWithContext(
+        <FlatButton />
+      );
+      assert.strictEqual(consoleStub.callCount, 1);
+      assert.strictEqual(
+        consoleStub.args[0][0],
+        'Warning: Failed propType: Required prop label or children or icon was not specified in FlatButton.'
+      );
+    });
+
+    it('should not throw when using a valid properties', () => {
+      shallowWithContext(
+        <FlatButton label={0} />
+      );
+      assert.strictEqual(consoleStub.callCount, 0);
+    });
+  });
 });

src/RaisedButton/RaisedButton.js

@@ -6,8 +6,10 @@ import EnhancedButton from '../internal/EnhancedButton';
 import Paper from '../Paper';
 
 function validateLabel(props, propName, componentName) {
-  if (!props.children && !props.label && !props.icon) {
-    return new Error(`Required prop label or children or icon was not specified in ${componentName}.`);
+  if (process.env.NODE_ENV !== 'production') {
+    if (!props.children && !props.label && !props.icon) {
+      return new Error(`Required prop label or children or icon was not specified in ${componentName}.`);
+    }
   }
 }
 

src/RaisedButton/RaisedButton.spec.js

@@ -3,6 +3,7 @@ import React from 'react';
 import ReactDOM from 'react-dom';
 import TestUtils from 'react-addons-test-utils';
 import {mount, shallow} from 'enzyme';
+import {stub} from 'sinon';
 import {assert} from 'chai';
 import RaisedButton from './RaisedButton';
 import ActionAndroid from '../svg-icons/action/android';
@@ -102,4 +103,34 @@ describe('<RaisedButton />', () => {
       muiTheme.raisedButton.fontSize
     );
   });
+
+  describe('propTypes', () => {
+    let consoleStub;
+
+    beforeEach(() => {
+      consoleStub = stub(console, 'error');
+    });
+
+    afterEach(() => {
+      console.error.restore(); // eslint-disable-line no-console
+    });
+
+    it('should throw when using wrong properties', () => {
+      shallowWithContext(
+        <RaisedButton />
+      );
+      assert.strictEqual(consoleStub.callCount, 1);
+      assert.strictEqual(
+        consoleStub.args[0][0],
+        'Warning: Failed propType: Required prop label or children or icon was not specified in RaisedButton.'
+      );
+    });
+
+    it('should not throw when using a valid properties', () => {
+      shallowWithContext(
+        <RaisedButton label={0} />
+      );
+      assert.strictEqual(consoleStub.callCount, 0);
+    });
+  });
 });