[Task]: TEST-009: Test Login Form Component

[jeromehardaway]

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Priority: P1 - High
Effort: Medium (4-5 hours)
File: src/components/forms/login-form.test.tsx

Description

Build comprehensive test suite for the login form component with NextAuth integration. This security-critical component serves as the primary authentication gateway and requires thorough testing of authentication flows, error handling, and session management to ensure secure access control.

Test Cases

Rendering

• ✅ Renders correctly with all form fields
• ✅ Renders email input with proper attributes
• ✅ Renders password input (masked)
• ✅ Renders submit button with correct text
• ✅ Displays "Forgot Password" and "Sign Up" links if present

Validation

• ✅ Email validation (valid/invalid formats)
• ✅ Password field required validation
• ✅ Empty form submission prevented
• ✅ Client-side validation error messages

NextAuth Integration

• ✅ NextAuth signIn() called with correct credentials
• ✅ NextAuth signIn() called with correct provider ('credentials')
• ✅ NextAuth session established on successful login
• ✅ Callback URL passed correctly to signIn

Authentication Flow

• ✅ Login success redirect to dashboard/home
• ✅ Login success redirect to callback URL if provided
• ✅ User session data available after login

Error Handling

• ✅ Login error handling (invalid credentials)
• ✅ Network error handling
• ✅ Server error responses (500, 503)
• ✅ Error messages displayed to user
• ✅ Form remains functional after error
• ✅ NextAuth error codes handled (CredentialsSignin, etc.)

UI States

• ✅ Loading state during authentication
• ✅ Submit button disabled while loading
• ✅ Form fields disabled during submission
• ✅ Loading spinner or indicator displayed

Acceptance Criteria

• 80% component coverage minimum
• All user interactions tested
• NextAuth properly mocked for all scenarios
• No console errors or warnings during tests
• Authentication flow matches production behavior
• All error states properly handled and displayed
• Redirect behavior validated
• Tests run in <3 seconds
• Security: no credentials logged or exposed in tests

Technical Notes

• Mock next-auth/react signIn function: jest.mock('next-auth/react')
• Mock useRouter from next/router for redirect testing
• Use React Testing Library for component testing
• Use userEvent for realistic user interactions
• Test with @testing-library/jest-dom matchers
• Verify credentials object structure passed to NextAuth
• Mock successful and failed authentication responses

Testing Strategy

1. Rendering tests: Verify form structure and elements
2. Validation tests: Test input validation
3. Integration tests: Test NextAuth signIn integration
4. Success flow: Test complete login and redirect
5. Error scenarios: Test all authentication failures
6. Accessibility: Verify keyboard navigation and ARIA labels

Edge Cases to Cover

• Login with remember me option (if implemented)
• Multiple failed login attempts
• Session expiration during form completion
• Browser back button after login
• Autofill interactions
• CSRF token handling (if applicable)
• Rate limiting responses

Security Considerations

• Passwords never logged in tests
• Credentials properly sanitized in mocks
• No sensitive data in test snapshots
• Error messages don't leak security information
• Test account lockout scenarios (if implemented)

Accessibility Considerations

• Keyboard navigation works (Tab, Enter)
• ARIA labels on all form controls
• Error messages announced to screen readers
• Focus management on error states
• Password visibility toggle accessible (if present)

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