feat: publish av-tools 0.1.0

tests/unit/ffmpeg-mode.test.ts

@@ -0,0 +1,38 @@
+import { describe, expect, it } from 'vitest';
+import {
+  describeEngineMode,
+  selectEngineMode,
+  supportsMultithread,
+} from '../../src/ffmpeg/engine-mode';
+import type { EngineEnvironment } from '../../src/ffmpeg/ffmpeg.types';
+
+const isolated: EngineEnvironment = {
+  secureContext: true,
+  crossOriginIsolated: true,
+  sharedArrayBuffer: true,
+  hardwareConcurrency: 8,
+};
+
+describe('engine mode selection', () => {
+  it('selects multithread only when every required capability is present', () => {
+    expect(supportsMultithread(isolated)).toBe(true);
+    expect(selectEngineMode(isolated, 'automatic')).toBe('multithread');
+
+    for (const missing of [
+      'secureContext',
+      'crossOriginIsolated',
+      'sharedArrayBuffer',
+    ] as const) {
+      expect(
+        selectEngineMode({ ...isolated, [missing]: false }, 'automatic')
+      ).toBe('single-thread');
+    }
+  });
+
+  it('honours the safe single-thread preference', () => {
+    expect(selectEngineMode(isolated, 'force-single-thread')).toBe(
+      'single-thread'
+    );
+    expect(describeEngineMode('single-thread')).toMatch(/compatibility/);
+  });
+});