YouTube Transcript DL MCP Server

// Integration test for Python YouTube Transcript API // Tests the real Python API integration without mocking import { describe, it, expect } from '@jest/globals'; import { YouTubeTranscriptService } from '../../src/services/youtube-transcript.service.js'; describe('YouTube Transcript Python API Integration', () => { let service; beforeAll(() => { service = new YouTubeTranscriptService(); }); afterAll(() => { // Clean up cache service.clearCache(); }); it('should extract transcript from real YouTube video', async () => { const result = await service.getTranscript('dQw4w9WgXcQ', 'en', 'json'); expect(result).toBeDefined(); expect(result.videoId).toBe('dQw4w9WgXcQ'); expect(result.language).toBe('en'); expect(result.transcript).toBeInstanceOf(Array); expect(result.transcript.length).toBeGreaterThan(0); expect(result.metadata.source).toBe('youtube-transcript-api'); expect(result.metadata.extractedAt).toBeDefined(); expect(result.metadata.duration).toBeGreaterThan(0); // Check transcript structure const firstItem = result.transcript[0]; expect(firstItem).toHaveProperty('text'); expect(firstItem).toHaveProperty('start'); expect(firstItem).toHaveProperty('duration'); expect(typeof firstItem.text).toBe('string'); expect(typeof firstItem.start).toBe('number'); expect(typeof firstItem.duration).toBe('number'); }, 30000); it('should list available transcripts for video', async () => { const result = await service.listTranscripts('dQw4w9WgXcQ'); expect(result).toBeDefined(); expect(result.success).toBe(true); expect(result.videoId).toBe('dQw4w9WgXcQ'); expect(result.transcripts).toBeInstanceOf(Array); expect(result.transcripts.length).toBeGreaterThan(0); // Check transcript listing structure const firstTranscript = result.transcripts[0]; expect(firstTranscript).toHaveProperty('language'); expect(firstTranscript).toHaveProperty('language_code'); expect(firstTranscript).toHaveProperty('is_generated'); expect(firstTranscript).toHaveProperty('is_translatable'); expect(typeof firstTranscript.language).toBe('string'); expect(typeof firstTranscript.language_code).toBe('string'); expect(typeof firstTranscript.is_generated).toBe('boolean'); expect(typeof firstTranscript.is_translatable).toBe('boolean'); }, 30000); it('should handle invalid video ID gracefully', async () => { const result = await service.getTranscript('invalid-video-id', 'en', 'json'); expect(result).toBeDefined(); expect(result.videoId).toBe('invalid-video-id'); expect(result.title).toBe('Error'); expect(result.transcript).toEqual([]); expect(result.metadata.error).toBeDefined(); expect(typeof result.metadata.error).toBe('string'); }, 30000); it('should format transcript correctly', () => { const sampleTranscript = [ { text: 'Hello world', start: 0, duration: 2 }, { text: 'This is a test', start: 2, duration: 3 } ]; // Test text format const textResult = service.formatTranscript(sampleTranscript, 'text'); expect(textResult).toBe('Hello world This is a test'); // Test JSON format const jsonResult = service.formatTranscript(sampleTranscript, 'json'); const parsed = JSON.parse(jsonResult); expect(parsed).toEqual(sampleTranscript); // Test SRT format const srtResult = service.formatTranscript(sampleTranscript, 'srt'); expect(srtResult).toContain('00:00:00,000 --> 00:00:02,000'); expect(srtResult).toContain('Hello world'); expect(srtResult).toContain('00:00:02,000 --> 00:00:05,000'); expect(srtResult).toContain('This is a test'); }); it('should use cache for repeated requests', async () => { const result1 = await service.getTranscript('dQw4w9WgXcQ', 'en', 'json'); const result2 = await service.getTranscript('dQw4w9WgXcQ', 'en', 'json'); expect(result1).toEqual(result2); // Verify cache is being used by checking that both results have the same timestamp expect(result1.metadata.extractedAt).toBe(result2.metadata.extractedAt); }, 30000); it('should provide cache statistics', () => { const stats = service.getCacheStats(); expect(stats).toBeDefined(); expect(typeof stats).toBe('object'); }); it('should clear cache successfully', () => { expect(() => service.clearCache()).not.toThrow(); }); });