src/test.ts

// This file is required by karma.conf.js and loads recursively all the .spec and framework files

import {getTestBed} from '@angular/core/testing'
import {BrowserDynamicTestingModule} from '@angular/platform-browser-dynamic/testing'
import {platformBrowserDynamicTesting} from '@angular/platform-browser-dynamic/testing'
import 'zone.js/dist/zone-testing'

declare const require: any

// First, initialize the Angular testing environment.
getTestBed().initTestEnvironment(
    BrowserDynamicTestingModule,
    platformBrowserDynamicTesting()
)
// Then we find all the tests.
const context = require.context('./', true, /\.spec\.ts$/)
// And load the modules.
context.keys().map(context)