Unit test http context in Angular-CodePudding

I have this API call in my service

import { HttpContext } from '@angular/common/http';
export const SET_INVALID_TOKEN = new HttpContextToken(() => false);
...
    postSomething() {
        this.httpClient.post<MyModel>(`${this.API_SERVER_ADDRESS}/...`, {...}, { context: new HttpContext().set(SET_INVALID_TOKEN, true) })
    }

The reason I am using this context is to debug invalid token cases to my interceptors. You can find more information about this on this article. I should mention here that this context is used ONLY for debugging purposes. The point is that it should never be forgotten at a production stage.

Here is my unit test for the api call

fit('should ...', (done: DoneFn) => {
    let httpTestingController = TestBed.get(HttpTestingController);
    let service = TestBed.get(AnalysisAPIService);
    service.postSomething().subscribe(
        analyses => {
            ...
            done()
        },
        done.fail
    )
    const req = httpTestingController.expectOne(service["API_SERVER_ADDRESS"]   "/...");
    console.log(req.request.context.keys())
    req.flush(AnalysisMock.mockAnalysesResponse)// allows to use the dummy data
    
});

PROBLEM

The req.request.context.keys() is an empty object

QUESTION

how can I check for my unit test if there is an HttpContext set?

CodePudding user response：

Instead of relying on the http mock, you can use spies


const spy = jasmine.createSpy().and.returnValue(of(EMPTY));

service['httpClient'].post = spy;

service.postSomething();

expect(spy.calls.argsFor(1)[1].context instanceof HttpContext).toBeTrue();