I have a text input and i'm listening for the changes.
mycomponent.ts
ngOnInit() {
this.searchInput = new Control();
this.searchInput.valueChanges
.distinctUntilChanged()
.subscribe(newValue => this.search(newValue))
}
search(query) {
// do something to search
}
mycomponent.html
<search-box>
<input type="text" [ngFormControl]="searchInput" >
</search-box>
Running the application everything works fine, but i want to unit-test it.
So here's what i tried
mycomponent.spec.ts
beforeEach(done => {
createComponent().then(fix => {
cmpFixture = fix
mockResponse()
instance = cmpFixture.componentInstance
cmpFixture.detectChanges();
done();
})
})
describe('on searching on the list', () => {
let compiled, input
beforeEach(() => {
cmpFixture.detectChanges();
compiled = cmpFixture.debugElement.nativeElement;
spyOn(instance, 'search').and.callThrough()
input = compiled.querySelector('search-box > input')
input.value = 'fake-search-query'
cmpFixture.detectChanges();
})
it('should call the .search() method', () => {
expect(instance.search).toHaveBeenCalled()
})
})
Test fails as the .search()
method is not called.
I guess i have to set the value
in another way to have the test realize of the change but i really don't know how.
Anyone has ideas?
It might be a little bit late, but it seems that your code is not dispatching input
event after setting input element value:
// ...
input.value = 'fake-search-query';
input.dispatchEvent(new Event('input'));
cmpFixture.detectChanges();
// ...