test: add comprehensive test suite for Ombi integration

- Add tests for Ombi configuration parsing (OMBI_INSTANCES JSON array, legacy fallback)
- Add tests for OmbiClient API methods (movie/TV requests, search by TMDB/IMDB/TVDB)
- Add tests for OmbiRetriever caching, queue, and search functionality
- Add tests for arrRetrieverRegistry initialization and retrieval methods
- Add tests for DownloadMatcher.addOmbiMatching integration
- Add tests for DownloadAssembler Ombi link generation utilities
- Export addOmbiMatching from DownloadMatcher module

tests/unit/services/DownloadAssembler.test.js

@@ -752,4 +752,78 @@ describe('DownloadAssembler', () => {
       ]);
     });
   });
+
+  describe('getOmbiLink', () => {
+    it('returns correct URL for valid requestId, type, and baseUrl', () => {
+      const result = DownloadAssembler.getOmbiLink(123, 'movie', 'http://localhost:5000');
+      expect(result).toBe('http://localhost:5000/#/request/movie/123');
+    });
+
+    it('returns correct URL for TV type', () => {
+      const result = DownloadAssembler.getOmbiLink(456, 'tv', 'http://localhost:5000');
+      expect(result).toBe('http://localhost:5000/#/request/tv/456');
+    });
+
+    it('returns null when requestId is missing', () => {
+      const result = DownloadAssembler.getOmbiLink(null, 'movie', 'http://localhost:5000');
+      expect(result).toBeNull();
+    });
+
+    it('returns null when type is missing', () => {
+      const result = DownloadAssembler.getOmbiLink(123, null, 'http://localhost:5000');
+      expect(result).toBeNull();
+    });
+
+    it('returns null when baseUrl is missing', () => {
+      const result = DownloadAssembler.getOmbiLink(123, 'movie', null);
+      expect(result).toBeNull();
+    });
+
+    it('returns null when all parameters are missing', () => {
+      const result = DownloadAssembler.getOmbiLink(null, null, null);
+      expect(result).toBeNull();
+    });
+
+    it('handles string requestId', () => {
+      const result = DownloadAssembler.getOmbiLink('abc-123', 'movie', 'http://localhost:5000');
+      expect(result).toBe('http://localhost:5000/#/request/movie/abc-123');
+    });
+  });
+
+  describe('getOmbiSearchLink', () => {
+    it('returns correct URL for series type', () => {
+      const result = DownloadAssembler.getOmbiSearchLink(789, 'series', 'http://localhost:5000');
+      expect(result).toBe('http://localhost:5000/#/tv/search/789');
+    });
+
+    it('returns correct URL for movie type', () => {
+      const result = DownloadAssembler.getOmbiSearchLink(101, 'movie', 'http://localhost:5000');
+      expect(result).toBe('http://localhost:5000/#/movie/search/101');
+    });
+
+    it('returns null when searchId is missing', () => {
+      const result = DownloadAssembler.getOmbiSearchLink(null, 'series', 'http://localhost:5000');
+      expect(result).toBeNull();
+    });
+
+    it('returns null when type is missing', () => {
+      const result = DownloadAssembler.getOmbiSearchLink(789, null, 'http://localhost:5000');
+      expect(result).toBeNull();
+    });
+
+    it('returns null when baseUrl is missing', () => {
+      const result = DownloadAssembler.getOmbiSearchLink(789, 'series', null);
+      expect(result).toBeNull();
+    });
+
+    it('returns null for invalid type', () => {
+      const result = DownloadAssembler.getOmbiSearchLink(789, 'invalid', 'http://localhost:5000');
+      expect(result).toBeNull();
+    });
+
+    it('handles string searchId', () => {
+      const result = DownloadAssembler.getOmbiSearchLink('search-123', 'movie', 'http://localhost:5000');
+      expect(result).toBe('http://localhost:5000/#/movie/search/search-123');
+    });
+  });
 });