The Problem
rxjs map() is not included in istanbul code coverage report, despite the lines being tested. The other questions related to this cover http-testing, which this isn't about. I need to either find a way to test pipes or exclude statements inside pipe() from coverage reports.
Description
I have an Akita entity store and query for vehicles. Based on some settings a vehicle can use either frontendLocation if it exists or CurrentLocation (naming is not up to me).
vehicle.query.ts
export class VehicleQuery extends QueryEntity<VehicleState, Vehicle> {
/** Returns an observable<number[]>, e.g. [50, 50] */
location$ = this.selectActive().pipe(
filterNil,
map((v) => v.frontendLocation || v.CurrentLocation), // This is shown as not covered
distinctUntilChanged(_.isEqual)
);
// ...constructor etc.
}
In my spec file I set an active vehicle with a frontendLocation and test that the query:
- Gets the frontendLocation of the vehicle if it exists
- Gets the CurrentLocation of the vehicle if frontendLocation doesn't exist.
describe('VehicleQuery', () => {
const vehicle = { ...otherAttributes, frontendLocation: [50, 50], CurrentLocation: [49, 49] };
let query: VehicleQuery;
let store: VehicleStore;
beforeEach(() => {
TestBed.configureTestingModule({
providers: [VehicleQuery, VehicleStore],
});
query = TestBed.get(VehicleQuery);
store = TestBed.get(VehicleStore);
store.add(vehicle);
store.setActive(vehicle.Id);
});
describe('location', () => {
it('Returns frontendLocation of current vehicle if it exists', () => {
query.location$.subscribe((s) => {
expect(s).toEqual([50, 50]);
expect(s).not.toEqual([49, 49]);
});
});
it("Returns CurrentLocation of current vehicle if frontendLocation doesn't exist", () => {
store.updateActive({ frontendLocation: null });
query.location$.subscribe((s) => {
expect(s).toEqual([49, 49]);
expect(s).not.toEqual([50, 50]);
});
});
});
This covers both options inside the query's location$ pipe. Both tests pass, but the map() on line 4 of the query still shows up as not covered.
