53881: added some tests

src/app/shared/input-suggestions/input-suggestions.component.html

@@ -7,7 +7,7 @@
            class="form-control"
            [dsDebounce]="debounceTime" (onDebounce)="findSuggestions.emit($event)"
            [placeholder]="placeholder"
-           [ngModelOptions]="{standalone: true}" autocomplete="off"/>
+           [ngModelOptions]="{standalone: true}" autocomplete="off" id="suggestion_input"/>
     <input type="submit" class="d-none"/>
     <div class="autocomplete dropdown-menu" [ngClass]="{'show': (show | async) && isNotEmpty(suggestions)}">
         <ul class="list-unstyled">

src/app/shared/input-suggestions/input-suggestions.component.spec.ts

+import { ChangeDetectionStrategy, DebugElement, NO_ERRORS_SCHEMA } from '@angular/core';
+
+import { TranslateModule } from '@ngx-translate/core';
+import { InputSuggestionsComponent } from './input-suggestions.component';
+import { By } from '@angular/platform-browser';
+import { async, ComponentFixture, fakeAsync, TestBed, tick } from '@angular/core/testing';
+import { FormsModule } from '@angular/forms';
+import { NoopAnimationsModule } from '@angular/platform-browser/animations';
+import { RouterTestingModule } from '@angular/router/testing';
+
+fdescribe('InputSuggestionsComponent', () => {
+
+  let comp: InputSuggestionsComponent;
+  let fixture: ComponentFixture<InputSuggestionsComponent>;
+  let de: DebugElement;
+  let el: HTMLElement;
+  const suggestions = ['suggestion uno', 'suggestion dos', 'suggestion tres'];
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      imports: [TranslateModule.forRoot(), RouterTestingModule.withRoutes([]), NoopAnimationsModule, FormsModule],
+      declarations: [InputSuggestionsComponent],
+      providers: [],
+      schemas: [NO_ERRORS_SCHEMA]
+    }).overrideComponent(InputSuggestionsComponent, {
+      set: { changeDetection: ChangeDetectionStrategy.Default }
+    }).compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(InputSuggestionsComponent);
+
+    comp = fixture.componentInstance; // LoadingComponent test instance
+    comp.suggestions = suggestions;
+    // query for the message <label> by CSS element selector
+    de = fixture.debugElement;
+    el = de.nativeElement;
+  });
+
+  it('should create', () => {
+    expect(comp).toBeTruthy();
+  });
+
+  describe('when the input field is in focus', () => {
+
+    beforeEach(() => {
+      const inputElement = de.query(By.css('#suggestion_input'));
+      inputElement.nativeElement.focus();
+      fixture.detectChanges();
+
+    });
+
+    it('should not have any element in focus', () => {
+      const activeElement = el.ownerDocument.activeElement;
+      expect(activeElement.nodeName.toLowerCase()).not.toEqual('a');
+    });
+
+    describe('when key up is pressed', () => {
+      beforeEach(fakeAsync(() => {
+        spyOn(comp, 'shiftFocusUp');
+        const form = de.query(By.css('form'));
+        form.triggerEventHandler('keydown.arrowup', {});
+        fixture.detectChanges();
+      }));
+
+      it('should call shiftFocusUp()', () => {
+        expect(comp.shiftFocusUp).toHaveBeenCalled();
+      });
+    });
+
+    describe('when shiftFocusUp() triggered', () => {
+      beforeEach(fakeAsync(() => {
+        comp.shiftFocusUp(new KeyboardEvent('keydown.arrowup'));
+        fixture.detectChanges();
+      }));
+
+      it('should put the focus on the last element ', fakeAsync(() => {
+        const lastLink = de.query(By.css('.list-unstyled > li:last-child a'));
+        const activeElement = el.ownerDocument.activeElement;
+        expect(activeElement).toEqual(lastLink.nativeElement);
+      }));
+    });
+
+    describe('when key down is pressed', () => {
+      beforeEach(fakeAsync(() => {
+        spyOn(comp, 'shiftFocusDown');
+        const form = de.query(By.css('form'));
+        form.triggerEventHandler('keydown.arrowdown', {});
+        fixture.detectChanges();
+      }));
+
+      it('should call shiftFocusDown()', () => {
+        expect(comp.shiftFocusDown).toHaveBeenCalled();
+      });
+    });
+
+    describe('when shiftFocusDown() triggered', () => {
+      beforeEach(fakeAsync(() => {
+        comp.shiftFocusDown(new KeyboardEvent('keydown.arrowdown'));
+        fixture.detectChanges();
+      }));
+
+      it('should put the focus on the first element ', fakeAsync(() => {
+        const lastLink = de.query(By.css('.list-unstyled > li:first-child a'));
+        const activeElement = el.ownerDocument.activeElement;
+        expect(activeElement).toEqual(lastLink.nativeElement);
+      }));
+    });
+  });
+
+
+
+});