57 lines
1.7 KiB
TypeScript
57 lines
1.7 KiB
TypeScript
import { afterEach, describe, expect, it, vi } from 'vitest';
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import { MediaQueryWatcher } from '../../../src/condition-trigger/common/media-query-watcher';
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import { stubMatchMedia } from '../../test-utils';
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// @vitest-environment jsdom
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describe('MediaQueryWatcher', () => {
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afterEach(() => {
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vi.restoreAllMocks();
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});
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it('should report whether the query matches', () => {
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stubMatchMedia().mockReturnValue({
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matches: true,
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} as unknown as MediaQueryList);
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expect(new MediaQueryWatcher('(orientation: landscape)').matches()).toBe(true);
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});
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it('should invoke the callback on a media-query change', () => {
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const addEventListener = vi.fn();
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stubMatchMedia().mockReturnValue({
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addEventListener,
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removeEventListener: vi.fn(),
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} as unknown as MediaQueryList);
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const onChange = vi.fn();
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new MediaQueryWatcher('(orientation: landscape)').subscribe(onChange);
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expect(addEventListener).toHaveBeenCalledWith('change', expect.anything());
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addEventListener.mock.calls[0][1]();
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expect(onChange).toHaveBeenCalledTimes(1);
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});
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it('should stop listening and ignore changes after teardown', () => {
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const addEventListener = vi.fn();
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const removeEventListener = vi.fn();
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stubMatchMedia().mockReturnValue({
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addEventListener,
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removeEventListener,
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} as unknown as MediaQueryList);
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const onChange = vi.fn();
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const teardown = new MediaQueryWatcher('(orientation: landscape)').subscribe(
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onChange,
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);
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const handler = addEventListener.mock.calls[0][1];
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teardown();
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expect(removeEventListener).toHaveBeenCalledWith('change', expect.anything());
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handler();
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expect(onChange).not.toHaveBeenCalled();
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});
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});
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