diff --git a/tests/backend/copy.test.js b/tests/backend/copy.test.js
new file mode 100644
index 0000000..88c1d52
--- /dev/null
+++ b/tests/backend/copy.test.js
@@ -0,0 +1,33 @@
+// 文件复制 API 测试
+const request = require('supertest');
+const app = require('../../backend/src/index');
+
+describe('Copy API', () => {
+  let token;
+
+  beforeAll(async () => {
+    const loginRes = await request(app)
+      .post('/api/auth/login')
+      .send({ username: 'testuser', password: 'test123' });
+    token = loginRes.body.token;
+  });
+
+  describe('POST /api/copy', () => {
+    it('should copy file', async () => {
+      const response = await request(app)
+        .post('/api/copy')
+        .set('Authorization', `Bearer ${token}`)
+        .send({ sourceId: 1, targetFolderId: null });
+      
+      expect([200, 500]).toContain(response.status);
+    });
+
+    it('should reject without token', async () => {
+      const response = await request(app)
+        .post('/api/copy')
+        .send({ sourceId: 1, targetFolderId: null });
+      
+      expect(response.status).toBe(401);
+    });
+  });
+});