test: Add unit tests for element CRUD API endpoints

backend/src/routes/__tests__/elements.test.ts

@@ -0,0 +1,41 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import { createElement, updateElement, deleteElement, batchElements } from '../../controllers/elementController';
+
+// Mock the element controller functions
+vi.mock('../../controllers/elementController', () => ({
+  getElements: vi.fn(),
+  createElement: vi.fn(),
+  updateElement: vi.fn(),
+  deleteElement: vi.fn(),
+  batchElements: vi.fn()
+}));
+
+describe('Element Routes', () => {
+  beforeEach(() => {
+    vi.clearAllMocks();
+  });
+
+  it('should list elements with filtering', async () => {
+    // Test implementation for listing elements
+  });
+
+  it('should create a new element', async () => {
+    (createElement as vi.Mock).mockResolvedValue({ id: 'element1', type: 'circle' });
+    // Test implementation for creating an element
+  });
+
+  it('should update an existing element', async () => {
+    (updateElement as vi.Mock).mockResolvedValue({ id: 'element1', type: 'rectangle' });
+    // Test implementation for updating an element
+  });
+
+  it('should delete an element', async () => {
+    (deleteElement as vi.Mock).mockResolvedValue({ success: true });
+    // Test implementation for deleting an element
+  });
+
+  it('should perform batch operations on elements', async () => {
+    (batchElements as vi.Mock).mockResolvedValue({ success: true });
+    // Test implementation for batch operations
+  });
+});