feat(aria/tabs): add test harnesses (#33079)

* feat(aria/tabs): add test harnesses

* fixup! feat(aria/tabs): add test harnesses

Author: ok7sai

goldens/aria/tabs/testing/index.api.md

@@ -0,0 +1,50 @@
+## API Report File for "@angular/aria_tabs_testing"
+
+> Do not edit this file. It is a report generated by [API Extractor](https://api-extractor.com/).
+
+```ts
+
+import { BaseHarnessFilters } from '@angular/cdk/testing';
+import { ComponentHarness } from '@angular/cdk/testing';
+import { ContentContainerComponentHarness } from '@angular/cdk/testing';
+import { HarnessLoader } from '@angular/cdk/testing';
+import { HarnessPredicate } from '@angular/cdk/testing';
+
+// @public
+export class TabHarness extends ContentContainerComponentHarness {
+    // (undocumented)
+    protected getRootHarnessLoader(): Promise<HarnessLoader>;
+    getTitle(): Promise<string>;
+    // (undocumented)
+    static hostSelector: string;
+    isActive(): Promise<boolean>;
+    isDisabled(): Promise<boolean>;
+    isSelected(): Promise<boolean>;
+    select(): Promise<void>;
+    static with(options?: TabHarnessFilters): HarnessPredicate<TabHarness>;
+}
+
+// @public
+export interface TabHarnessFilters extends BaseHarnessFilters {
+    disabled?: boolean;
+    selected?: boolean;
+    title?: string | RegExp;
+}
+
+// @public
+export class TabsHarness extends ComponentHarness {
+    getSelectedTab(): Promise<TabHarness | null>;
+    getTabs(filters?: TabHarnessFilters): Promise<TabHarness[]>;
+    // (undocumented)
+    static hostSelector: string;
+    selectTab(filters?: TabHarnessFilters): Promise<void>;
+    static with(options?: TabsHarnessFilters): HarnessPredicate<TabsHarness>;
+}
+
+// @public
+export interface TabsHarnessFilters extends BaseHarnessFilters {
+}
+
+// (No @packageDocumentation comment for this package)
+
+```

src/aria/config.bzl

@@ -9,6 +9,7 @@ ARIA_ENTRYPOINTS = [
     "menu",
     "menu/testing",
     "tabs",
+    "tabs/testing",
     "toolbar",
     "toolbar/testing",
     "tree",

src/aria/tabs/testing/BUILD.bazel

@@ -0,0 +1,38 @@
+load("//tools:defaults.bzl", "ng_project", "ng_web_test_suite", "ts_project")
+
+package(default_visibility = ["//visibility:public"])
+
+ts_project(
+    name = "testing",
+    srcs = glob(
+        ["**/*.ts"],
+        exclude = ["**/*.spec.ts"],
+    ),
+    deps = [
+        "//src/cdk/testing",
+    ],
+)
+
+filegroup(
+    name = "source-files",
+    srcs = glob(["**/*.ts"]),
+)
+
+ng_project(
+    name = "unit_tests_lib",
+    testonly = True,
+    srcs = glob(["**/*.spec.ts"]),
+    deps = [
+        ":testing",
+        "//:node_modules/@angular/common",
+        "//:node_modules/@angular/core",
+        "//src/aria/tabs",
+        "//src/cdk/testing",
+        "//src/cdk/testing/testbed",
+    ],
+)
+
+ng_web_test_suite(
+    name = "unit_tests",
+    deps = [":unit_tests_lib"],
+)

src/aria/tabs/testing/index.ts

@@ -0,0 +1,9 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+export * from './public-api';

src/aria/tabs/testing/public-api.ts

@@ -0,0 +1,10 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+export * from './tabs-harness';
+export * from './tabs-harness-filters';

src/aria/tabs/testing/tabs-harness-filters.ts

@@ -0,0 +1,22 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+import {BaseHarnessFilters} from '@angular/cdk/testing';
+
+/** A set of criteria that can be used to filter a list of `TabsHarness` instances. */
+export interface TabsHarnessFilters extends BaseHarnessFilters {}
+
+/** A set of criteria that can be used to filter a list of `TabHarness` instances. */
+export interface TabHarnessFilters extends BaseHarnessFilters {
+  /** Only find instances whose title matches the given value. */
+  title?: string | RegExp;
+  /** Only find instances that are selected. */
+  selected?: boolean;
+  /** Only find instances that are disabled. */
+  disabled?: boolean;
+}

src/aria/tabs/testing/tabs-harness.spec.ts

@@ -0,0 +1,156 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.dev/license
+ */
+
+import {Component} from '@angular/core';
+import {ComponentFixture, TestBed} from '@angular/core/testing';
+import {ComponentHarness, HarnessLoader} from '@angular/cdk/testing';
+import {TestbedHarnessEnvironment} from '@angular/cdk/testing/testbed';
+import {Tabs, TabList, Tab, TabPanel, TabContent} from '../../tabs';
+import {TabsHarness} from './tabs-harness';
+
+class TestContentHarness extends ComponentHarness {
+  static hostSelector = '.test-content';
+  async getText(): Promise<string> {
+    return (await this.host()).text();
+  }
+}
+
+describe('TabsHarness', () => {
+  let fixture: ComponentFixture<TabsHarnessTest>;
+  let loader: HarnessLoader;
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(TabsHarnessTest);
+    fixture.detectChanges();
+    loader = TestbedHarnessEnvironment.loader(fixture);
+  });
+
+  it('should load harness with tabs container', async () => {
+    await expectAsync(loader.getHarness(TabsHarness)).toBeResolved();
+  });
+
+  it('should get tabs', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+
+    const tabItems = await tabs.getTabs();
+
+    expect(tabItems.length).toBe(3);
+  });
+
+  it('should get tab panel content via ContentContainerComponentHarness', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+    const tabItems = await tabs.getTabs();
+
+    const contentHarness = await tabItems[0].getHarness(TestContentHarness);
+
+    expect(await contentHarness.getText()).toBe('Content 1');
+  });
+
+  it('should get selected tab', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+
+    const selectedTab = await tabs.getSelectedTab();
+
+    expect(await selectedTab?.getTitle()).toBe('Tab 1');
+  });
+
+  it('should switch tabs on click', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+    const tabItems = await tabs.getTabs();
+    expect(await tabItems[0].isSelected()).toBe(true);
+    expect(await tabItems[1].isSelected()).toBe(false);
+
+    await tabItems[1].select();
+
+    expect(await tabItems[0].isSelected()).toBe(false);
+    expect(await tabItems[1].isSelected()).toBe(true);
+  });
+
+  it('should select tab matching filters', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+    const tabItems = await tabs.getTabs();
+
+    expect(await tabItems[0].isSelected()).toBe(true);
+    expect(await tabItems[1].isSelected()).toBe(false);
+
+    await tabs.selectTab({title: 'Tab 2'});
+
+    expect(await tabItems[0].isSelected()).toBe(false);
+    expect(await tabItems[1].isSelected()).toBe(true);
+  });
+
+  it('should check disabled state', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+    const tabItems = await tabs.getTabs();
+
+    expect(await tabItems[0].isDisabled()).toBe(false);
+    expect(await tabItems[2].isDisabled()).toBe(true);
+  });
+
+  it('should check active state', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+    const tabItems = await tabs.getTabs();
+
+    expect(await tabItems[0].isActive()).toBe(true);
+    expect(await tabItems[1].isActive()).toBe(false);
+  });
+
+  it('should filter tabs by title', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+
+    const filteredTabs = await tabs.getTabs({title: 'Tab 2'});
+
+    expect(filteredTabs.length).toBe(1);
+    expect(await filteredTabs[0].getTitle()).toBe('Tab 2');
+  });
+
+  it('should filter tabs by selected state', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+
+    const filteredTabs = await tabs.getTabs({selected: true});
+
+    expect(filteredTabs.length).toBe(1);
+    expect(await filteredTabs[0].getTitle()).toBe('Tab 1');
+  });
+
+  it('should filter tabs by disabled state', async () => {
+    const tabs = await loader.getHarness(TabsHarness);
+
+    const filteredTabs = await tabs.getTabs({disabled: true});
+
+    expect(filteredTabs.length).toBe(1);
+    expect(await filteredTabs[0].getTitle()).toBe('Tab 3');
+  });
+});
+
+@Component({
+  template: `
+    <div ngTabs>
+      <ul ngTabList [selectedTab]="'tab1'">
+        <li ngTab value="tab1">Tab 1</li>
+        <li ngTab value="tab2">Tab 2</li>
+        <li ngTab value="tab3" [disabled]="true">Tab 3</li>
+      </ul>
+
+
+      <div ngTabPanel value="tab1">
+        <ng-template ngTabContent>
+          <div class="test-content">Content 1</div>
+        </ng-template>
+      </div>
+      <div ngTabPanel value="tab2">
+        <ng-template ngTabContent>Content 2</ng-template>
+      </div>
+      <div ngTabPanel value="tab3">
+        <ng-template ngTabContent>Content 3</ng-template>
+      </div>
+    </div>
+  `,
+  imports: [Tabs, TabList, Tab, TabPanel, TabContent],
+})
+class TabsHarnessTest {}