test: isolate module mocking and add sequential test script

test/bot.test.js

@@ -1,4 +1,4 @@
-import { describe, it, expect, mock, spyOn, beforeEach } from "bun:test";
+import { describe, it, expect, mock, spyOn, beforeEach, afterAll } from "bun:test";
 import logger from "../src/utils/logger.js";
 
 // Mock environment
@@ -145,4 +145,8 @@ describe("Telegram Bot Handler", () => {
     expect(mockForwardToStorage).not.toHaveBeenCalled();
     expect(replyMock).toHaveBeenCalledWith(expect.stringContaining("exceeds"));
   });
+
+  afterAll(() => {
+    mock.restore();
+  });
 });

test/files.test.js

@@ -1,5 +1,4 @@
-import { describe, it, expect, mock, spyOn, beforeEach } from "bun:test";
-import logger from "../src/utils/logger.js";
+import { describe, it, expect, mock, beforeEach, afterAll } from "bun:test";
 
 // Mock database layer
 const mockSelect = mock(() => ({
@@ -176,4 +175,8 @@ describe("File Route Handlers", () => {
       expect(body.error).toBe("Server error");
     });
   });
+
+  afterAll(() => {
+    mock.restore();
+  });
 });

test/upload.test.js

@@ -1,5 +1,4 @@
-import { describe, it, expect, mock, spyOn, beforeEach, afterEach } from "bun:test";
-import logger from "../src/utils/logger.js";
+import { describe, it, expect, mock, beforeEach, afterAll } from "bun:test";
 
 // Mock db
 const mockInsert = mock(() => ({
@@ -116,4 +115,8 @@ describe("Upload Route Handler", () => {
     expect(body.public_id).toBe("mocked-nanoid-id");
     expect(body.file_name).toBe("test_multi.txt");
   });
+
+  afterAll(() => {
+    mock.restore();
+  });
 });