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* adding check for mousemove * adding unit test for SyntheticMouseEvent * changing test to start with 2, removing comments
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packages/react-dom/src/events/__tests__/SyntheticMouseEvent-test.js
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/** | ||
* Copyright (c) 2013-present, Facebook, Inc. | ||
* | ||
* 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 | ||
*/ | ||
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'use strict'; | ||
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let React; | ||
let ReactDOM; | ||
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describe('SyntheticMouseEvent', () => { | ||
let container; | ||
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beforeEach(() => { | ||
React = require('react'); | ||
ReactDOM = require('react-dom'); | ||
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// The container has to be attached for events to fire. | ||
container = document.createElement('div'); | ||
document.body.appendChild(container); | ||
}); | ||
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afterEach(() => { | ||
document.body.removeChild(container); | ||
container = null; | ||
}); | ||
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it('should only use values from movementX/Y when event type is mousemove', () => { | ||
const events = []; | ||
const onMouseMove = event => { | ||
events.push(event.movementX); | ||
}; | ||
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const onMouseDown = event => { | ||
events.push(event.movementX); | ||
}; | ||
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const node = ReactDOM.render( | ||
<div onMouseMove={onMouseMove} onMouseDown={onMouseDown} />, | ||
container, | ||
); | ||
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let event = new MouseEvent('mousemove', { | ||
relatedTarget: null, | ||
bubbles: true, | ||
screenX: 2, | ||
screenY: 2, | ||
}); | ||
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node.dispatchEvent(event); | ||
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event = new MouseEvent('mousemove', { | ||
relatedTarget: null, | ||
bubbles: true, | ||
screenX: 8, | ||
screenY: 8, | ||
}); | ||
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node.dispatchEvent(event); | ||
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// Now trigger a mousedown event to see if movementX has changed back to 0 | ||
event = new MouseEvent('mousedown', { | ||
relatedTarget: null, | ||
bubbles: true, | ||
screenX: 25, | ||
screenY: 65, | ||
}); | ||
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node.dispatchEvent(event); | ||
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expect(events.length).toBe(3); | ||
expect(events[0]).toBe(0); | ||
expect(events[1]).toBe(6); | ||
expect(events[2]).toBe(0); // mousedown event should have movementX at 0 | ||
}); | ||
}); |