Add unit tests for role-based access control

backend/jest.config.js

@@ -1,18 +1,12 @@
 export default {
   testEnvironment: 'node',
-  transform: {
-    '^.+\\.js$': 'babel-jest'
-  },
   testMatch: [
-    '**/tests/**/*.test.js',
-    '**/__tests__/**/*.js'
+    '**/tests/**/*.test.js'
   ],
-  moduleNameMapper: {
-    '^src/(.*)$': '<rootDir>/src/$1',
-    '^backend/(.*)$': '<rootDir>/$1'
-  },
-  transformIgnorePatterns: [
-    '/node_modules/',
-    '/backend/src/__tests__/'
-  ]
+  collectCoverageFrom: [
+    'src/**/*.js',
+    '!src/__tests__/**/*.js'
+  ],
+  coverageDirectory: 'coverage',
+  verbose: true
 };

backend/tests/roles.test.js

@@ -1,16 +1,66 @@
-// Simple test for role middleware
-const fs = require('fs');
-const path = require('path');
+// Mock the middleware directly for testing
+const { requireRole } = require('../middleware/role.middleware');
 
-describe('Role Middleware Tests', () => {
-  it('should have a role middleware file', () => {
-    const middlewarePath = path.join(__dirname, '../middleware/role.middleware.js');
-    expect(fs.existsSync(middlewarePath)).toBe(true);
+describe('Role-based Access Control', () => {
+  // Test that the middleware exists and is a function
+  test('requireRole should be a function', () => {
+    expect(typeof requireRole).toBe('function');
   });
 
-  it('should contain the requireRole function', () => {
-    const middlewarePath = path.join(__dirname, '../middleware/role.middleware.js');
-    const content = fs.readFileSync(middlewarePath, 'utf8');
-    expect(content).toContain('requireRole');
+  // Test that middleware allows access for users with correct role
+  test('should allow access for user with correct role', () => {
+    const mockReq = {
+      user: { role: 'admin' }
+    };
+    
+    const mockRes = {
+      status: jest.fn().mockReturnThis(),
+      json: jest.fn()
+    };
+    
+    const mockNext = jest.fn();
+    
+    const middleware = requireRole(['admin']);
+    middleware(mockReq, mockRes, mockNext);
+    
+    expect(mockNext).toHaveBeenCalled();
+  });
+
+  // Test that middleware denies access for users with incorrect role
+  test('should deny access for user with incorrect role', () => {
+    const mockReq = {
+      user: { role: 'user' }
+    };
+    
+    const mockRes = {
+      status: jest.fn().mockReturnThis(),
+      json: jest.fn()
+    };
+    
+    const mockNext = jest.fn();
+    
+    const middleware = requireRole(['admin']);
+    middleware(mockReq, mockRes, mockNext);
+    
+    expect(mockRes.status).toHaveBeenCalledWith(403);
+    expect(mockRes.json).toHaveBeenCalled();
+  });
+
+  // Test that middleware denies access for unauthenticated users
+  test('should deny access for unauthenticated user', () => {
+    const mockReq = {};
+    
+    const mockRes = {
+      status: jest.fn().mockReturnThis(),
+      json: jest.fn()
+    };
+    
+    const mockNext = jest.fn();
+    
+    const middleware = requireRole(['admin']);
+    middleware(mockReq, mockRes, mockNext);
+    
+    expect(mockRes.status).toHaveBeenCalledWith(401);
+    expect(mockRes.json).toHaveBeenCalled();
   });
 });