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JavaScript
/**
* Copyright (c) Facebook, Inc. and its affiliates.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*
* @emails react-core
*/
;
// Set by `yarn test-fire`.
const {disableInputAttributeSyncing} = require('shared/ReactFeatureFlags');
describe('DOMPropertyOperations', () => {
let React;
let ReactDOM;
beforeEach(() => {
jest.resetModules();
React = require('react');
ReactDOM = require('react-dom');
});
describe('setValueForProperty', () => {
it('should set values as properties by default', () => {
const container = document.createElement('div');
ReactDOM.render(<div title="Tip!" />, container);
expect(container.firstChild.title).toBe('Tip!');
});
it('should set values as attributes if necessary', () => {
const container = document.createElement('div');
ReactDOM.render(<div role="#" />, container);
expect(container.firstChild.getAttribute('role')).toBe('#');
expect(container.firstChild.role).toBeUndefined();
});
it('should set values as namespace attributes if necessary', () => {
const container = document.createElementNS(
'http://www.w3.org/2000/svg',
'svg',
);
ReactDOM.render(<image xlinkHref="about:blank" />, container);
expect(
container.firstChild.getAttributeNS(
'http://www.w3.org/1999/xlink',
'href',
),
).toBe('about:blank');
});
it('should set values as boolean properties', () => {
const container = document.createElement('div');
ReactDOM.render(<div disabled="disabled" />, container);
expect(container.firstChild.getAttribute('disabled')).toBe('');
ReactDOM.render(<div disabled={true} />, container);
expect(container.firstChild.getAttribute('disabled')).toBe('');
ReactDOM.render(<div disabled={false} />, container);
expect(container.firstChild.getAttribute('disabled')).toBe(null);
ReactDOM.render(<div disabled={true} />, container);
ReactDOM.render(<div disabled={null} />, container);
expect(container.firstChild.getAttribute('disabled')).toBe(null);
ReactDOM.render(<div disabled={true} />, container);
ReactDOM.render(<div disabled={undefined} />, container);
expect(container.firstChild.getAttribute('disabled')).toBe(null);
});
it('should convert attribute values to string first', () => {
// Browsers default to this behavior, but some test environments do not.
// This ensures that we have consistent behavior.
const obj = {
toString: function() {
return 'css-class';
},
};
const container = document.createElement('div');
ReactDOM.render(<div className={obj} />, container);
expect(container.firstChild.getAttribute('class')).toBe('css-class');
});
it('should not remove empty attributes for special input properties', () => {
const container = document.createElement('div');
ReactDOM.render(<input value="" onChange={() => {}} />, container);
if (disableInputAttributeSyncing) {
expect(container.firstChild.hasAttribute('value')).toBe(false);
} else {
expect(container.firstChild.getAttribute('value')).toBe('');
}
expect(container.firstChild.value).toBe('');
});
it('should not remove empty attributes for special option properties', () => {
const container = document.createElement('div');
ReactDOM.render(
<select>
<option value="">empty</option>
<option>filled</option>
</select>,
container,
);
// Regression test for https://github.com/facebook/react/issues/6219
expect(container.firstChild.firstChild.value).toBe('');
expect(container.firstChild.lastChild.value).toBe('filled');
});
it('should remove for falsey boolean properties', () => {
const container = document.createElement('div');
ReactDOM.render(<div allowFullScreen={false} />, container);
expect(container.firstChild.hasAttribute('allowFullScreen')).toBe(false);
});
it('should remove when setting custom attr to null', () => {
const container = document.createElement('div');
ReactDOM.render(<div data-foo="bar" />, container);
expect(container.firstChild.hasAttribute('data-foo')).toBe(true);
ReactDOM.render(<div data-foo={null} />, container);
expect(container.firstChild.hasAttribute('data-foo')).toBe(false);
});
it('should set className to empty string instead of null', () => {
const container = document.createElement('div');
ReactDOM.render(<div className="selected" />, container);
expect(container.firstChild.className).toBe('selected');
ReactDOM.render(<div className={null} />, container);
// className should be '', not 'null' or null (which becomes 'null' in
// some browsers)
expect(container.firstChild.className).toBe('');
expect(container.firstChild.getAttribute('class')).toBe(null);
});
it('should remove property properly for boolean properties', () => {
const container = document.createElement('div');
ReactDOM.render(<div hidden={true} />, container);
expect(container.firstChild.hasAttribute('hidden')).toBe(true);
ReactDOM.render(<div hidden={false} />, container);
expect(container.firstChild.hasAttribute('hidden')).toBe(false);
});
it('should always assign the value attribute for non-inputs', function() {
const container = document.createElement('div');
ReactDOM.render(<progress />, container);
spyOnDevAndProd(container.firstChild, 'setAttribute');
ReactDOM.render(<progress value={30} />, container);
ReactDOM.render(<progress value="30" />, container);
expect(container.firstChild.setAttribute).toHaveBeenCalledTimes(2);
});
it('should return the progress to intermediate state on null value', () => {
const container = document.createElement('div');
ReactDOM.render(<progress value={30} />, container);
ReactDOM.render(<progress value={null} />, container);
// Ensure we move progress back to an indeterminate state.
// Regression test for https://github.com/facebook/react/issues/6119
expect(container.firstChild.hasAttribute('value')).toBe(false);
});
});
describe('deleteValueForProperty', () => {
it('should remove attributes for normal properties', () => {
const container = document.createElement('div');
ReactDOM.render(<div title="foo" />, container);
expect(container.firstChild.getAttribute('title')).toBe('foo');
ReactDOM.render(<div />, container);
expect(container.firstChild.getAttribute('title')).toBe(null);
});
it('should not remove attributes for special properties', () => {
const container = document.createElement('div');
ReactDOM.render(
<input type="text" value="foo" onChange={function() {}} />,
container,
);
if (disableInputAttributeSyncing) {
expect(container.firstChild.hasAttribute('value')).toBe(false);
} else {
expect(container.firstChild.getAttribute('value')).toBe('foo');
}
expect(container.firstChild.value).toBe('foo');
expect(() =>
ReactDOM.render(
<input type="text" onChange={function() {}} />,
container,
),
).toWarnDev(
'A component is changing a controlled input of type text to be uncontrolled',
);
if (disableInputAttributeSyncing) {
expect(container.firstChild.hasAttribute('value')).toBe(false);
} else {
expect(container.firstChild.getAttribute('value')).toBe('foo');
}
expect(container.firstChild.value).toBe('foo');
});
it('should not remove attributes for custom component tag', () => {
const container = document.createElement('div');
ReactDOM.render(<my-icon size="5px" />, container);
expect(container.firstChild.getAttribute('size')).toBe('5px');
});
});
});