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I am new to writing test specs using jasmine. I have a condition in ngOnInit() something like, router.url.includes(some string). The default spec test case which checks component to be truthy is getting failed saying TypeError: Cannot find includes of undefined. Is there any way to spy or mock includes?

user11819144
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  • https://stackoverflow.com/a/39793256/7365461 You can mock the router or try using RouterTestingModule. – AliF50 Apr 19 '21 at 16:52

1 Answers1

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You can use RouterTestingModule to mock the angular router.

Just import the angular router as below.

import { RouterTestingModule } from '@angular/router/testing';
import { ActivatedRoute, Router } from '@angular/router';

And add it to the imports array of NgModule


TestBed.configureTestingModule({
    declarations: [
        someComponent
    ],
    imports: [
        RouterTestingModule.withRoutes([]),
    ],
    providers: [someProvider],
}).compileComponents

Then you can inject the Router as follows and use it for testing

it('should Navigate', () => {
    const actiavtedRoute = TestBed.inject(ActivatedRoute);
    const router = TestBed.inject(Router);
})
Mohana Naga Venkat Sayempu
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