diff --git a/tests/tmdbAPIService.test.ts b/tests/tmdbAPIService.test.ts
new file mode 100644
index 0000000..cb65160
--- /dev/null
+++ b/tests/tmdbAPIService.test.ts
@@ -0,0 +1,34 @@
+import { TMDbAPIService } from "../src/api/tmdbAPIService";
+
+const mockFetch = jest.fn()
+
+global.fetch = mockFetch as any;
+
+const settings = {
+    apiKey: "FAKE_KEY",
+    language: 'en-US'
+};
+
+describe("TMDbAPIService", () =>{
+    beforeEach(() => {
+        mockFetch.mockReset();
+    });
+
+    it("should append apiKey and language to requests", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({success: true}),
+        });
+
+        const service = new TMDbAPIService(settings);
+        const result = await service.checkAPIKey();
+
+        expect(result).toBe(true);
+        expect(mockFetch).toHaveBeenCalledWith(
+            expect.stringContaining("api_key=FAKE_KEY")
+        );
+        expect(mockFetch).toHaveBeenCalledWith(
+            expect.stringContaining("language=en-US")
+        );
+    });
+});
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diff --git a/tests/tmdbGenreService.test.ts b/tests/tmdbGenreService.test.ts
new file mode 100644
index 0000000..d1e19c1
--- /dev/null
+++ b/tests/tmdbGenreService.test.ts
@@ -0,0 +1,52 @@
+import { TMDbGanreService } from "../src/api/tmdbGenreService";
+
+const mockFetch = jest.fn()
+
+global.fetch = mockFetch as any;
+
+const settings = {
+    apiKey: "FAKE_KEY",
+    language: 'en-US'
+};
+
+describe("TMDbGanreService", () =>{
+    beforeEach(() => {
+        mockFetch.mockReset();
+    });
+
+    it("should initialize genre map", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({
+                genres: [{id: 1, name: "Action"}, {id: 2, name: "Drama"}],
+            }),
+        });
+
+        const service = new TMDbGanreService(settings);
+        await service.init();
+
+        const mapped = service.mapGenreIds([1, 2, 3]);
+        
+        expect(mapped).toEqual([
+            {id: 1, name: "Action"},
+            {id: 2, name: "Drama"},
+            {id: 3, name: "Unknown"},
+        ]);
+    });
+
+    it("should return empty array when pass empty array", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({
+                genres: [{id: 1, name: "Action"}, {id: 2, name: "Drama"}],
+            }),
+        });
+
+        const service = new TMDbGanreService(settings);
+        await service.init();
+
+        const mapped = service.mapGenreIds([]);
+        
+        expect(mapped).toEqual([]);
+    });
+});
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diff --git a/tests/tmdbMovieService.test.ts b/tests/tmdbMovieService.test.ts
new file mode 100644
index 0000000..5cb7c4c
--- /dev/null
+++ b/tests/tmdbMovieService.test.ts
@@ -0,0 +1,115 @@
+import { TMDbMovieService } from "../src/api/tmdbMovieService";
+
+const mockFetch = jest.fn()
+
+global.fetch = mockFetch as any;
+
+const settings = {
+    apiKey: "FAKE_KEY",
+    language: 'en-US'
+};
+
+describe("TMDbGanreService", () =>{
+    beforeEach(() => {
+        mockFetch.mockReset();
+    });
+
+    it("should search by IMDb id", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({
+                movie_results: [
+                    { id: 123, title: "The Matrix", adult: false, genre_ids: [1] },
+                ],
+            }),
+        });
+
+        const service = new TMDbMovieService(settings);
+        const result = await service.searchMovie("tt0133093");
+
+        expect(result.results[0]?.title).toBe("The Matrix");
+        expect(result.total_results).toBe(1);
+    });
+
+    it("should return empty array by wrong IMDb id", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({
+                "movie_results": [],
+                "person_results": [],
+                "tv_results": [],
+                "tv_episode_results": [],
+                "tv_season_results": []
+            }),
+        });
+
+        const service = new TMDbMovieService(settings);
+        const result = await service.searchMovie("tt0000000");
+
+        expect(result.results).toEqual([]);
+        expect(result.total_results).toBe(0);
+    });
+
+    it("should search by name", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({
+                page: 1,
+                results: [{ id: 456, title: "Inception" }],
+                total_pages: 1,
+                total_results: 1,
+            }),
+        });
+
+        const service = new TMDbMovieService(settings);
+        const result = await service.searchMovie("Inception");
+
+        expect(result.results[0]?.title).toBe("Inception");
+        expect(result.total_results).toBe(1);
+    });
+
+    it("should return empty array by wrong name", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({
+                page: 1,
+                results: [],
+                total_pages: 1,
+                total_results: 0,
+            }),
+        });
+
+        const service = new TMDbMovieService(settings);
+        const result = await service.searchMovie("rhueif");
+
+        expect(result.results).toEqual([]);
+        expect(result.total_results).toBe(0);
+    });
+
+    it("should search by id", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({ id: 789, title: "Interstellar" }),
+        });
+
+        const service = new TMDbMovieService(settings);
+        const movie = await service.getMovieById(789);
+        expect(movie).not.toBeNull();
+        expect(movie!.title).toBe("Interstellar");
+    });
+
+    it("should return null by wrong id", async () => {
+        mockFetch.mockResolvedValueOnce({
+            ok: true,
+            json: async () => ({
+                "success": false,
+                "status_code": 34,
+                "status_message": "The resource you requested could not be found."
+            }),
+        });
+
+        const service = new TMDbMovieService(settings);
+        const movie = await service.getMovieById(78933493049);
+        expect(movie).toBeNull();
+    });
+});
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