My component file has the following code
@ViewChild('clusterCard', { static: false }) clusterCard: ElementRef;
highLightTheClusterCard(point: PickupClusterPoint) {
if (point) {
const card: HTMLElement = _get(this.clusterCard, 'nativeElement');
const selectedPoint: PositioningPoint = this.lane.data.selectedPostioningPoint;
/* if card is available, position point of the card and the cluster is same and infowindow over the cluster is open then
highlight the card */
if (card && _isEqual(point.pointData, selectedPoint) && point.openInfoWindow) {
card.scrollIntoView();
card['style'].borderLeft = `5px solid ${this.lane.data.color || 'transparent'}`;
} else {
card['style'].borderLeft = `5px solid transparent`;
}
}
}
ngAfterViewChecked(): void {
...some code
this.pickupClusterPointsService.positioningPoint$
.pipe(skip(1), takeUntil(this.unsubscriber.done))
.subscribe((point: PickupClusterPoint) => {
this.highLightTheClusterCard(point);
});
}
HTML file
<div #clusterCard>
<pickup-cluster-stop-card
..some code
>
</pickup-cluster-stop-card>
</div>
I want to unit test the highLightTheClusterCard method. I am getting
TypeError: Cannot read property 'pipe' of undefined error properties
and TypeError: Cannot set property 'borderLeft' of undefined at
Unit test file
beforeEach(() => {
...some code
fixture = TestBed.createComponent(RouteLaneComponent);
component = fixture.componentInstance;
....some code
fixture.detectChanges();
});
fdescribe('highLightTheClusterCard', () => {
it('should expect cluster card to be defined ', () => {
// component.clusterCard.nativeElement = new HTMLElement();
component.clusterCard = new ElementRef({ nativeElement: jasmine.createSpyObj('nativeElement', ['scrollIntoView', 'style'])});
component.highLightTheClusterCard({ pointData: new PositioningPoint(), openInfoWindow: true} as PickupClusterPoint);
// expect(component.clusterCard).toBeDefined();
// expect(component.clusterCard.nativeElement.scrollIntoView).toHaveBeenCalled();
});
});
I read this How to mock a nativeElement.focus() in Angular 4 spec file
but still, I am unable to make it green.
MockService(PickupClusterPointsService, {
...more code
positioningPoint$: of(undefined),
}),
Solution: I have added positioningPoint$: of(undefined)
in mock service. MockService is inside the Provider. you can see above lines.
describe('highLightTheClusterCard', () => {
it('should expect cluster card to be highlighted when hover over infowindow ', () => {
component.lane.data.selectedPostioningPoint = new PositioningPoint();
component.lane.data.color = '#2196F3';
component.clusterCard = {
nativeElement: jasmine.createSpyObj('nativeElement', ['scrollIntoView', 'style'])
};
component.highLightTheClusterCard({ pointData: new PositioningPoint(), openInfoWindow: true} as PickupClusterPoint);
expect(component.clusterCard).toBeDefined();
expect(component.clusterCard.nativeElement.scrollIntoView).toHaveBeenCalled();
expect(component.clusterCard.nativeElement.style.borderLeft).toBe('5px solid #2196F3');
});
it('should expect cluster card not to be highlighted when hover out from the infowindow', () => {
component.lane.data.selectedPostioningPoint = new PositioningPoint();
component.clusterCard = {
nativeElement: jasmine.createSpyObj('nativeElement', ['scrollIntoView', 'style'])
};
component.highLightTheClusterCard({ pointData: new PositioningPoint(), openInfoWindow: false} as PickupClusterPoint);
expect(component.clusterCard).toBeDefined();
expect(component.clusterCard.nativeElement.style.borderLeft).toBe('5px solid transparent');
});
});
You have several issues it seems.
Your first error
TypeError: Cannot read property 'pipe' of undefined error properties
come from that you haven't instantiated your pickupClusterPointsService service properly.
The second error
TypeError: Cannot set property 'borderLeft' of undefined at
I'm not sure just yet
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