Usage

The mock class MockStarkUserService can be imported as follows:

import { MockStarkUserService } from "@nationalbankbelgium/stark-core/testing";

Since the mock class implements the base interface of the service it mocks, you just need to provide the mock in your TestingModule:

TestBed.configureTestingModule({
    imports: [...],
    declarations: [...],
    providers: [
        ...
        { provide: STARK_USER_SERVICE, useValue: new MockStarkUserService() },
        ...
    ]
});

Then you can just inject the Stark service via the TestBed using its corresponding InjectionToken:

// this will inject the instantiated mock class
mockUserService = TetBed.get(STARK_USER_SERVICE);

In fact, every method of the base interface is simply mocked with a Jasmine Spy which can then be used in the unit tests to:

return custom values
override a method with a custom function
asserting that they are actually called
do any other operation than can be performed with an Spy.

For example:

// returning custom value
mockUserService.fetchUserProfile.and.returnValue(of(someUser));

// overriding a method with a custom function
mockUserService.fetchUserProfile.and.callFake(() => {
  // some custom logic to return a specific value
});

// asserting that a method was indeed called
expect(mockUserService.fetchUserProfile).toHaveBeenCalledTimes(1);

import { StarkUserService } from "@nationalbankbelgium/stark-core";
import Spy = jasmine.Spy;
import SpyObj = jasmine.SpyObj;

/**
 * Mock class of the {@link StarkUserService} interface.
 */
export class MockStarkUserService implements SpyObj<StarkUserService> {
	/**
	 * See [StarkUserService fetchUserProfile()]{@link StarkUserService#fetchUserProfile} method
	 */
	public fetchUserProfile: Spy<StarkUserService["fetchUserProfile"]> = jasmine.createSpy("fetchUserProfile");

	/**
	 * See [StarkUserService getAllUsers()]{@link StarkUserService#getAllUsers} method
	 */
	public getAllUsers: Spy<StarkUserService["getAllUsers"]> = jasmine.createSpy("getAllUsers");
}

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