react-native/Libraries/YellowBox/__tests__/YellowBox-test.js

78 lines
1.9 KiB
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 oncall+react_native
* @format
* @flow
*/
'use strict';
const YellowBox = require('YellowBox');
const YellowBoxRegistry = require('YellowBoxRegistry');
describe('YellowBox', () => {
const {error, warn} = console;
beforeEach(() => {
jest.resetModules();
(console: any).error = jest.fn();
(console: any).warn = jest.fn();
});
afterEach(() => {
YellowBox.uninstall();
(console: any).error = error;
(console: any).warn = warn;
});
it('can set `disableYellowBox` after installing', () => {
expect((console: any).disableYellowBox).toBe(undefined);
YellowBox.install();
expect((console: any).disableYellowBox).toBe(false);
expect(YellowBoxRegistry.isDisabled()).toBe(false);
(console: any).disableYellowBox = true;
expect((console: any).disableYellowBox).toBe(true);
expect(YellowBoxRegistry.isDisabled()).toBe(true);
});
it('can set `disableYellowBox` before installing', () => {
expect((console: any).disableYellowBox).toBe(undefined);
(console: any).disableYellowBox = true;
YellowBox.install();
expect((console: any).disableYellowBox).toBe(true);
expect(YellowBoxRegistry.isDisabled()).toBe(true);
});
it('registers warnings', () => {
jest.mock('YellowBoxRegistry');
YellowBox.install();
expect(YellowBoxRegistry.add).not.toBeCalled();
(console: any).warn('...');
expect(YellowBoxRegistry.add).toBeCalled();
});
it('registers errors beginning with "Warning: "', () => {
jest.mock('YellowBoxRegistry');
YellowBox.install();
(console: any).error('...');
expect(YellowBoxRegistry.add).not.toBeCalled();
(console: any).error('Warning: ...');
expect(YellowBoxRegistry.add).toBeCalled();
});
});