99 lines
3.1 KiB
TypeScript
99 lines
3.1 KiB
TypeScript
/**
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* Copyright (c) 2026 The xterm.js authors. All rights reserved.
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* @license MIT
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*/
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import { assert } from 'chai';
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import { TextBlinkStateManager } from 'browser/renderer/shared/TextBlinkStateManager';
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import { MockOptionsService } from 'common/TestUtils.test';
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import type { ICoreBrowserService } from 'browser/services/Services';
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import { Emitter } from 'common/Event';
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class FakeWindow {
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public nextId = 1;
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public intervals = new Map<number, () => void>();
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public setInterval(callback: () => void, _duration: number): number {
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const id = this.nextId++;
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this.intervals.set(id, callback);
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return id;
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}
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public clearInterval(id: number): void {
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this.intervals.delete(id);
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}
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}
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function createManager(duration: number): {
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manager: TextBlinkStateManager;
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window: FakeWindow;
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getRenderCount: () => number;
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} {
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const fakeWindow = new FakeWindow();
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let renderCount = 0;
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const coreBrowserService: ICoreBrowserService = {
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serviceBrand: undefined,
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isFocused: true,
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dpr: 1,
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onDprChange: new Emitter<number>().event,
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onWindowChange: new Emitter<Window & typeof globalThis>().event,
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window: fakeWindow as any,
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mainDocument: {} as any
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};
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const optionsService = new MockOptionsService({ blinkIntervalDuration: duration });
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const manager = new TextBlinkStateManager(() => {
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renderCount++;
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}, coreBrowserService, optionsService);
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return {
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manager,
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window: fakeWindow,
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getRenderCount: () => renderCount
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};
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}
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function getOnlyIntervalCallback(window: FakeWindow): () => void {
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const iterator = window.intervals.values();
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const first = iterator.next();
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assert.ok(!first.done);
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assert.ok(iterator.next().done);
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return first.value;
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}
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describe('TextBlinkStateManager', () => {
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it('starts interval only when needed', () => {
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const { manager, window } = createManager(100);
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assert.equal(window.intervals.size, 0);
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manager.setNeedsBlinkInViewport(true);
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assert.equal(window.intervals.size, 1);
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});
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it('stops interval and restores blink visibility when no longer needed', () => {
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const { manager, window, getRenderCount } = createManager(100);
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manager.setNeedsBlinkInViewport(true);
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const tick = getOnlyIntervalCallback(window);
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tick();
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const rendersAfterTick = getRenderCount();
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assert.equal(manager.isBlinkOn, false);
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manager.setNeedsBlinkInViewport(false);
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assert.equal(window.intervals.size, 0);
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assert.equal(manager.isBlinkOn, true);
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assert.equal(getRenderCount(), rendersAfterTick + 1);
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});
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it('pauses while viewport is hidden and resumes when visible', () => {
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const { manager, window } = createManager(100);
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manager.setNeedsBlinkInViewport(true);
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assert.equal(window.intervals.size, 1);
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manager.setViewportVisible(false);
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assert.equal(window.intervals.size, 0);
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manager.setViewportVisible(true);
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assert.equal(window.intervals.size, 1);
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});
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it('does not start interval when duration is zero', () => {
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const { manager, window } = createManager(0);
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manager.setNeedsBlinkInViewport(true);
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assert.equal(window.intervals.size, 0);
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});
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});
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