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const searchInput = fixture.debugElement.query(By.css('.mat-input-element')).nativeElement;
searchInput.value = customString;
searchInput.dispatchEvent(EventGenerator.input());
fixture.detectChanges();
tick(SEARCH_DEBOUNCE);
const customItem = fixture.debugElement.query(By.css('.custom-item'));
expect(uiSuggest.items.length).toBeGreaterThan(0);
expect(!!customItem).toBe(true);
const itemContainer = fixture.debugElement.query(By.css('.item-list-container'));
for (let i = 0; i <= uiSuggest.items.length; i++) {
itemContainer.nativeElement.dispatchEvent(
EventGenerator.keyDown(Key.ArrowUp),
);
}
fixture.detectChanges();
tick(VIRTUAL_SCROLL_DEBOUNCE);
expect(uiSuggest.activeIndex).toBe(-1);
itemContainer.nativeElement.dispatchEvent(
EventGenerator.keyDown(Key.Enter),
);
fixture.detectChanges();
tick(VIRTUAL_SCROLL_DEBOUNCE);
expect(uiSuggest.value[0].text).toBe(customString);
discardPeriodicTasks();