46 lines
1.4 KiB
TypeScript
46 lines
1.4 KiB
TypeScript
import { describe, expect, it, vi } from 'vitest';
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import { DeferredResourceLifecycle } from '../../src/ffmpeg/engine-lifecycle';
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describe('singleton engine lifecycle', () => {
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it('cancels deferred disposal when StrictMode immediately reacquires', () => {
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const dispose = vi.fn();
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const deferred: Array<() => void> = [];
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const lifecycle = new DeferredResourceLifecycle({ dispose }, (callback) =>
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deferred.push(callback)
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);
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const releaseFirstMount = lifecycle.acquire();
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releaseFirstMount();
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const releaseStrictModeRemount = lifecycle.acquire();
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deferred.shift()?.();
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expect(dispose).not.toHaveBeenCalled();
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expect(lifecycle.leaseCount).toBe(1);
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releaseStrictModeRemount();
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deferred.shift()?.();
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expect(dispose).toHaveBeenCalledOnce();
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expect(lifecycle.leaseCount).toBe(0);
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});
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it('disposes only after the last lease and ignores duplicate releases', () => {
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const dispose = vi.fn();
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const deferred: Array<() => void> = [];
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const lifecycle = new DeferredResourceLifecycle({ dispose }, (callback) =>
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deferred.push(callback)
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);
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const releaseOne = lifecycle.acquire();
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const releaseTwo = lifecycle.acquire();
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releaseOne();
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releaseOne();
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expect(deferred).toHaveLength(0);
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expect(lifecycle.leaseCount).toBe(1);
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releaseTwo();
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expect(deferred).toHaveLength(1);
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deferred[0]?.();
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expect(dispose).toHaveBeenCalledOnce();
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});
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});
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