feat: introduce audio merging and trimming tools with support for multiple formats

src/pages/tools/audio/change-speed/change-speed.service.test.ts

@@ -0,0 +1,35 @@
+import { expect, describe, it, vi } from 'vitest';
+
+// Mock FFmpeg since it doesn't support Node.js
+vi.mock('@ffmpeg/ffmpeg', () => ({
+  FFmpeg: vi.fn().mockImplementation(() => ({
+    loaded: false,
+    load: vi.fn().mockResolvedValue(undefined),
+    writeFile: vi.fn().mockResolvedValue(undefined),
+    exec: vi.fn().mockResolvedValue(undefined),
+    readFile: vi.fn().mockResolvedValue(new Uint8Array([1, 2, 3, 4, 5])),
+    deleteFile: vi.fn().mockResolvedValue(undefined)
+  }))
+}));
+
+vi.mock('@ffmpeg/util', () => ({
+  fetchFile: vi.fn().mockResolvedValue(new Uint8Array([1, 2, 3, 4, 5]))
+}));
+
+import { main } from './service';
+import { InitialValuesType } from './types';
+
+describe('changeSpeed (main)', () => {
+  it('should return the input file unchanged (mock implementation)', () => {
+    const mockAudioData = new Uint8Array([0, 1, 2, 3, 4, 5]);
+    const mockFile = new File([mockAudioData], 'test.mp3', {
+      type: 'audio/mp3'
+    });
+    const options: InitialValuesType = {
+      newSpeed: 2,
+      outputFormat: 'mp3'
+    };
+    const result = main(mockFile, options);
+    expect(result).toBe(mockFile);
+  });
+});