test: Add Unit Test Cases to Improve Test Coverage for Components
Issue Summary
Add comprehensive test coverage for LanguageSwitcher, LoginForm, and Accordion components.
Currently, these components either lack sufficient tests or need validation for key UI and interaction behaviors. The expected behavior is to ensure all critical user flows and UI states are covered with automated tests.
Problem Statement LanguageSwitcher.tsx lacks test coverage LoginForm and Accordion require structured validation of behaviors Impact:
Risk of regressions in language switching Reduced UI reliability and maintainability No automated validation of user interactions Critical flows like login/signup and UI toggles may break silently
Proposed Solution Add unit and interaction tests using Vitest + React Testing Library Cover rendering, UI behavior, and user interactions Mock dependencies like i18n and API calls
Components affected:
LanguageSwitcher.tsx LoginForm.tsx Accordion.tsx
Test-Driven Development Acceptance Criteria (Given-When-Then)
Scenario 1: LanguageSwitcher renders correctly
Given the LanguageSwitcher component is loaded When the component renders Then the current language should be displayed And dropdown should be accessible
Scenario 2: Language selection works
Given the language dropdown is opened When a user selects a different language Then i18n.changeLanguage should be triggered And selected language should show a check mark
Scenario 3: LoginForm login flow
Given the LoginForm is in login mode When valid credentials are entered Then API should be called And user should be logged in successfully Scenario 4: LoginForm error handling
Given invalid credentials are entered When the login request fails Then an error message should be displayed
Scenario 5: Accordion toggle behavior
Given multiple accordion items exist When one item is opened Then other items should close (single mode) And content should be visible
Test Cases
| Test ID | Test Description | Precondition | Test Steps | Expected Result | Priority |
|---|---|---|---|---|---|
| TC-001 | Render LanguageSwitcher | Component loaded | 1. Render component | Displays current language | High |
| TC-002 | Language dropdown items | Dropdown opened | 1. Click dropdown | Shows all languages | High |
| TC-003 | Change language | Dropdown open | 1. Select language | Calls i18n.changeLanguage | High |
| TC-004 | Login success | Valid credentials | 1. Enter data 2. Submit |
Login successful | High |
| TC-005 | Login failure | Invalid credentials | 1. Enter data 2. Submit |
Error message shown | High |
| TC-006 | Password toggle | Login form loaded | 1. Click toggle | Password visibility changes | Medium |
| TC-007 | Accordion toggle | Accordion loaded | 1. Click item | Opens/closes correctly | High |
| TC-008 | Single mode behavior | Multiple items | 1. Open item A 2. Open item B |
Item A closes | High |
Unit Test Requirements
Components/Functions to Test:
Module/Component Function/Hook Test Cases to Cover LanguageSwitcher.tsx language change handler TC-001, TC-002, TC-003 LoginForm.tsx handleSubmit TC-004, TC-005 LoginForm.tsx password toggle TC-006 Accordion.tsx toggle logic TC-007, TC-008
Test Assertions Required:
[x]Renders correctly with initial state [x] Handles user input correctly [x] Validates input and shows errors [x] Calls API with correct payload [x] Handles success response [x] Handles error response [x] Updates UI state appropriately
Implementation Details Files to Change
| File Path | Action | Purpose |
|---|---|---|
src/components/LanguageSwitcher.tsx |
Modify | Add testability improvements |
src/components/LoginForm.tsx |
Modify | Ensure test coverage |
src/components/ui/accordion.tsx |
Modify | Validate behavior |
src/__tests__/LanguageSwitcher.test.tsx |
Create | Unit tests |
src/__tests__/LoginForm.test.tsx |
Create | Unit tests |
src/__tests__/Accordion.test.tsx |
Create | Unit tests |
Testing Strategy Manual Testing
Environment:
Browser: Chrome, Firefox Viewport: Desktop & Mobile
Steps:
Test language switching Test login/signup flows Test accordion UI behavior
Automated Testing
Unit Tests:
[x] Component render tests [x] User interaction tests [x] API integration tests [x] Error handling tests
Definition of Done [x] Acceptance criteria met [x] All test cases passing [x] Manual testing completed [x] Code reviewed [x] No console errors [x] ESLint/Prettier passed [x] i18n handled properly