react/packages/shared/__tests__/ReactDOMFrameScheduling-test.js
Dan Abramov c080537a7b Flatten the shared/ folder (#11297)
* shared/src -> shared

It's not a real package and doesn't even have package.json.
This will also make importing less weird if we drop Haste.

* Get rid of shared/utils

Moved event-specific into shared/event.
Moved rest to the root since distinction has always been pretty arbitrary.

* Fix references to old shared/src paths
2017-10-20 12:59:57 +01:00

51 lines
1.5 KiB
JavaScript

/**
* Copyright (c) 2016-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
*/
'use strict';
describe('ReactDOMFrameScheduling', () => {
it('warns when requestAnimationFrame is not polyfilled in the browser', () => {
const previousRAF = global.requestAnimationFrame;
try {
global.requestAnimationFrame = undefined;
jest.resetModules();
spyOn(console, 'error');
require('react-dom');
expect(console.error.calls.count()).toBe(1);
expect(console.error.calls.argsFor(0)[0]).toContain(
'React depends on requestAnimationFrame.',
);
} finally {
global.requestAnimationFrame = previousRAF;
}
});
// We're just testing importing, not using it.
// It is important because even isomorphic components may import it.
it('can import findDOMNode in Node environment', () => {
const previousRAF = global.requestAnimationFrame;
const previousRIC = global.requestIdleCallback;
const prevWindow = global.window;
try {
global.requestAnimationFrame = undefined;
global.requestIdleCallback = undefined;
// Simulate the Node environment:
delete global.window;
jest.resetModules();
expect(() => {
require('react-dom');
}).not.toThrow();
} finally {
global.requestAnimationFrame = previousRAF;
global.requestIdleCallback = previousRIC;
global.window = prevWindow;
}
});
});