93 lines
3.1 KiB
TypeScript
93 lines
3.1 KiB
TypeScript
/**
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* @license
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* Copyright Google LLC All Rights Reserved.
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*
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* Use of this source code is governed by an MIT-style license that can be
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* found in the LICENSE file at https://angular.dev/license
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*/
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import {
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ComponentHarnessConstructor,
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ContentContainerComponentHarness,
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HarnessLoader,
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HarnessPredicate,
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} from '@angular/cdk/testing';
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import {TabHarnessFilters} from './tab-harness-filters';
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/** Harness for interacting with an Angular Material tab in tests. */
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export class MatTabHarness extends ContentContainerComponentHarness<string> {
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/** The selector for the host element of a `MatTab` instance. */
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static hostSelector = '.mat-mdc-tab';
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/**
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* Gets a `HarnessPredicate` that can be used to search for a tab with specific attributes.
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* @param options Options for filtering which tab instances are considered a match.
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* @return a `HarnessPredicate` configured with the given options.
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*/
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static with<T extends MatTabHarness>(
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this: ComponentHarnessConstructor<T>,
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options: TabHarnessFilters = {},
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): HarnessPredicate<T> {
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return new HarnessPredicate(this, options)
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.addOption('label', options.label, (harness, label) =>
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HarnessPredicate.stringMatches(harness.getLabel(), label),
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)
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.addOption(
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'selected',
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options.selected,
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async (harness, selected) => (await harness.isSelected()) == selected,
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);
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}
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/** Gets the label of the tab. */
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async getLabel(): Promise<string> {
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return (await this.host()).text();
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}
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/** Gets the aria-label of the tab. */
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async getAriaLabel(): Promise<string | null> {
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return (await this.host()).getAttribute('aria-label');
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}
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/** Gets the value of the "aria-labelledby" attribute. */
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async getAriaLabelledby(): Promise<string | null> {
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return (await this.host()).getAttribute('aria-labelledby');
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}
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/** Whether the tab is selected. */
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async isSelected(): Promise<boolean> {
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const hostEl = await this.host();
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return (await hostEl.getAttribute('aria-selected')) === 'true';
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}
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/** Whether the tab is disabled. */
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async isDisabled(): Promise<boolean> {
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const hostEl = await this.host();
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return (await hostEl.getAttribute('aria-disabled')) === 'true';
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}
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/** Selects the given tab by clicking on the label. Tab cannot be selected if disabled. */
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async select(): Promise<void> {
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await (await this.host()).click('center');
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}
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/** Gets the text content of the tab. */
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async getTextContent(): Promise<string> {
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const contentId = await this._getContentId();
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const contentEl = await this.documentRootLocatorFactory().locatorFor(`#${contentId}`)();
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return contentEl.text();
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}
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protected override async getRootHarnessLoader(): Promise<HarnessLoader> {
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const contentId = await this._getContentId();
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return this.documentRootLocatorFactory().harnessLoaderFor(`#${contentId}`);
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}
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/** Gets the element id for the content of the current tab. */
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private async _getContentId(): Promise<string> {
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const hostEl = await this.host();
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// Tabs never have an empty "aria-controls" attribute.
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return (await hostEl.getAttribute('aria-controls'))!;
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}
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}
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