Jasmine angular testing async promise

I need test an asyncronus promise in Jasmin and I don't know how to do it becase angular return an error every time.

myService.ts

async getNewContext(): Promise<IContext> {
const test1 = await this.service1.function();
const test2 = await this.service2.function();
const test3 = await this.service3.function();
const test4 = await this.service4.function();

const cc = {
.
.
.
};

this.setContext = cc;

return cc;
}


component.ts

setFeatures() {
this.myService.getNewContext().then((response) => {});
}


component.spect.ts

.
.
.
beforeEach(waitForAsync(() => {
TestBed.configureTestingModule({
declarations: [...],
imports: [...],
providers: [
{
provide: myService,
useValue: {
select: () => [],
getNewContext: () => [],
},
}
],
}).compileComponents();
}));


I am getting an error saying "getNewContext is not a function". Any idea please?

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