import {TranslateFakeLoader,TranslateLoader,TranslateModule,TranslateService } from '@ngx-translate/core';

​

TestBed.configureTestingModule({

      imports: [

        ...

        TranslateModule.forRoot({

          loader: {

            provide: TranslateLoader,

            useClass: TranslateFakeLoader

          }

        })

      ],

      ...

      providers: [

        TranslateService

      ]

​