feat(auth): add unit tests for AuthService

backend/src/auth/__tests__/auth.test.ts

@@ -0,0 +1,125 @@
+import { describe, it, expect, beforeEach } from 'vitest';
+import AuthService from '../AuthService';
+import { FastifyInstance } from 'fastify';
+
+// Mock Fastify instance
+const mockFastify = {
+  jwt: {
+    sign: (payload: any) => JSON.stringify(payload),
+    verify: (token: string) => JSON.parse(token)
+  }
+} as unknown as FastifyInstance;
+
+describe('AuthService', () => {
+  let authService: AuthService;
+
+  beforeEach(() => {
+    authService = new AuthService(mockFastify);
+  });
+
+  describe('register', () => {
+    it('should create a user with hashed password', async () => {
+      const user = await authService.register('test@example.com', 'password123', 'Test User');
+      
+      expect(user).toHaveProperty('id');
+      expect(user.email).toBe('test@example.com');
+      expect(user.displayName).toBe('Test User');
+      expect(user).not.toHaveProperty('passwordHash');
+    });
+
+    it('should throw an error if user already exists', async () => {
+      await authService.register('test@example.com', 'password123', 'Test User');
+      
+      await expect(authService.register('test@example.com', 'password123', 'Test User'))
+        .rejects.toThrow('User already exists');
+    });
+  });
+
+  describe('login', () => {
+    it('should return a JWT token for valid credentials', async () => {
+      await authService.register('test@example.com', 'password123', 'Test User');
+      
+      const token = await authService.login('test@example.com', 'password123');
+      
+      expect(token).toBeDefined();
+      expect(typeof token).toBe('string');
+    });
+
+    it('should throw an error for invalid credentials', async () => {
+      await expect(authService.login('test@example.com', 'wrongpassword'))
+        .rejects.toThrow('Invalid credentials');
+    });
+  });
+
+  describe('logout', () => {
+    it('should invalidate the session', async () => {
+      await authService.register('test@example.com', 'password123', 'Test User');
+      const token = await authService.login('test@example.com', 'password123');
+      
+      await expect(authService.logout(token)).resolves.not.toThrow();
+    });
+
+    it('should throw an error for invalid token', async () => {
+      await expect(authService.logout('invalid-token'))
+        .rejects.toThrow('Invalid token');
+    });
+  });
+
+  describe('getMe', () => {
+    it('should return current user info', async () => {
+      const user = await authService.register('test@example.com', 'password123', 'Test User');
+      
+      const userInfo = await authService.getMe(user.id);
+      
+      expect(userInfo).toEqual(user);
+    });
+
+    it('should throw an error if user not found', async () => {
+      await expect(authService.getMe('non-existent-id'))
+        .rejects.toThrow('User not found');
+    });
+  });
+
+  describe('requestPasswordReset', () => {
+    it('should generate a reset token', async () => {
+      await authService.register('test@example.com', 'password123', 'Test User');
+      
+      // Mock console.log to verify it's called
+      const consoleSpy = vi.spyOn(console, 'log').mockImplementation(() => {});
+      
+      await authService.requestPasswordReset('test@example.com');
+      
+      expect(consoleSpy).toHaveBeenCalled();
+      
+      consoleSpy.mockRestore();
+    });
+  });
+
+  describe('confirmPasswordReset', () => {
+    it('should reset password with valid token', async () => {
+      // Register user
+      const user = await authService.register('test@example.com', 'password123', 'Test User');
+      
+      // Mock console.log to capture the reset token
+      let resetToken = '';
+      const consoleSpy = vi.spyOn(console, 'log').mockImplementation((msg) => {
+        if (msg.startsWith('Password reset token for')) {
+          resetToken = msg.split(': ')[1];
+        }
+      });
+      
+      // Request password reset
+      await authService.requestPasswordReset('test@example.com');
+      
+      consoleSpy.mockRestore();
+      
+      // Confirm password reset
+      await expect(authService.confirmPasswordReset(resetToken, 'newpassword123'))
+        .resolves.not.toThrow();
+      
+      // Verify login with new password works
+      await expect(authService.login('test@example.com', 'newpassword123'))
+        .resolves.toBeDefined();
+    });
+  });
+});