Angular 2 Unit Test for a promise

I normally use fakeAsync to test a subscribe returning an observable. But on this rare occasion, I need to do the same but for a promise.

This is my attempt:

//Service Stub:

const testService = {
testMethod:
jasmine.createSpy('testMethod').and.callFake(() => new Promise(() => 'test'))
};

it('test example',() => {
// Arrange
const response = 'test';
component.selected = undefined;

// Act
component['myMethod']();

//Assert
expect(component.selected).toEqual(response);
});


This is my actual code:

private myMethod(): void {
return this.testService.testMethod()
.then((response: string) => {
this.selected = response;
})
.catch(error => this.logger.error(error, this));
}


Basically, need to know how to wait for "this.testService.testMethod" to return and set selected.

Currently, it's not waiting for the promise to return.

Note: I've updated my current attempt. But still got undefined in the expect.

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