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jest.setup.angular.ts
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jest.setup.angular.ts
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import 'jest-preset-angular/setup-jest';
/**
* Must be imported here so the Reflect functionality is availble in the Jest instance.
*
* Typically Angular already imports this functionality. NestJS also will import this functionality on its own.
*/
import 'reflect-metadata';
/**
* Must add TextEncoder/TextDecoder to the globals since it is not available in JSDOM by default.
*
* https://github.com/firebase/firebase-js-sdk/issues/7845
*/
import { TextEncoder, TextDecoder } from 'util';
(global as any).TextEncoder = TextEncoder;
(global as any).TextDecoder = TextDecoder;
// https://stackoverflow.com/questions/39830580/jest-test-fails-typeerror-window-matchmedia-is-not-a-function
var window: any;
beforeAll(() => {
if (window) {
// only use in jsdom environment
Object.defineProperty(window, 'matchMedia', {
writable: true,
value: jest.fn().mockImplementation((query) => ({
matches: false,
media: query,
onchange: null,
addListener: jest.fn(), // Deprecated
removeListener: jest.fn(), // Deprecated
addEventListener: jest.fn(),
removeEventListener: jest.fn(),
dispatchEvent: jest.fn()
}))
});
}
});