/*
 * Copyright (C) 2024 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import {ComponentFixture, TestBed} from '@angular/core/testing';
import {MatButtonModule} from '@angular/material/button';
import {MatIconModule} from '@angular/material/icon';
import {assertDefined} from 'common/assert_utils';
import {CollapsibleSectionTitleComponent} from './collapsible_section_title_component';

describe('CollapsibleSectionTitleComponent', () => {
  let fixture: ComponentFixture<CollapsibleSectionTitleComponent>;
  let component: CollapsibleSectionTitleComponent;
  let htmlElement: HTMLElement;

  beforeEach(async () => {
    await TestBed.configureTestingModule({
      imports: [MatButtonModule, MatIconModule],
      declarations: [CollapsibleSectionTitleComponent],
    }).compileComponents();
    fixture = TestBed.createComponent(CollapsibleSectionTitleComponent);
    component = fixture.componentInstance;
    htmlElement = fixture.nativeElement;
    component.title = 'collapsible section';
    fixture.detectChanges();
  });

  it('can be created', () => {
    expect(component).toBeTruthy();
  });

  it('displays button and title', () => {
    assertDefined(htmlElement.querySelector('button'));
    const title = assertDefined(htmlElement.querySelector('.mat-title'));
    expect(title.textContent).toContain('COLLAPSIBLE SECTION');
  });

  it('emits collapseButtonClicked event', () => {
    const spy = spyOn(component.collapseButtonClicked, 'emit');
    const collapseButton = assertDefined(
      htmlElement.querySelector('button'),
    ) as HTMLElement;
    collapseButton.click();
    fixture.detectChanges();
    expect(spy).toHaveBeenCalledTimes(1);
  });
});