test: add test files for ui components alert.test.tsx button.test.tsx card, carousel, aspect-ratio, calendar, chart, checkbox, collapsible

Issue Summary

Implemented and expanded unit test coverage for reusable UI components to improve reliability, maintainability, and regression safety across the application.

The current issue was the lack of proper test coverage for multiple shared UI components, which could lead to unnoticed UI breakages, accessibility issues, styling regressions, and unstable component behavior.

The expected outcome is to ensure that all major reusable UI components are covered with meaningful test cases validating rendering, behavior, variants, accessibility, state changes, and ref forwarding.

Problem Statement

Several reusable UI components did not have sufficient automated unit test coverage.

What was missing? Rendering validation for shared UI components Behavior testing for interactive components Variant/style validation Accessibility-related checks Ref forwarding validation Callback and state change verification Who is affected? Developers working on the UI library QA/testing teams End users indirectly, if regressions occur Impact Increased chance of UI regressions Unstable shared components affecting multiple screens Reduced confidence during refactoring or future feature work

Proposed Solution

Add and improve unit tests for reusable UI components using Vitest and React Testing Library.

Approach Create dedicated test files for each shared UI component Cover: rendering props variants custom classes accessibility interaction behavior state changes ref forwarding exported helper/function validation

Components to be tested alert, button, card, aspect-ratio,calendar, chart, checkbox, collapsible, pagination

Dependencies / blockers

No major blockers Requires stable component exports and consistent DOM behavior

Test-Driven Development

Acceptance Criteria (Given-When-Then)

Scenario 1: UI component renders correctly

Given a reusable UI component is imported into the test When the component is rendered Then it should appear in the document And it should apply its default structure/classes correctly

Scenario 2: Component supports custom props and classes

Given a reusable UI component receives props or className When the component is rendered Then the custom props should be applied correctly And the custom className should be merged with default classes Scenario 3: Interactive component responds to user actions

Given an interactive UI component is rendered When the user performs an action such as click, toggle, or navigation Then the expected UI state or callback behavior should occur

Scenario 4: Accessibility and semantic structure are preserved

Given a UI component is rendered When inspected in the test environment Then it should expose expected accessibility or semantic behavior

Scenario 5: Ref forwarding works correctly

Given a ref is passed to a reusable component When the component is rendered Then the ref should point to the expected DOM element

Test Cases

Test ID	Test Description	Precondition	Test Steps	Expected Result	Priority
TC-001	Verify component rendering	Component imported	1. Render component 2. Query element 3. Assert presence	Component renders correctly	High
TC-002	Verify custom class name support	Component accepts `className`	1. Render with custom class 2. Inspect DOM	Custom class is applied	High
TC-003	Verify variant styling	Component supports variants	1. Render with variant prop 2. Assert class/style behavior	Correct variant styles applied	High
TC-004	Verify user interaction	Interactive component rendered	1. Trigger click/toggle/navigation 2. Observe state/UI	Correct interaction behavior occurs	High
TC-005	Verify disabled state	Disabled prop supported	1. Render disabled component 2. Try interaction	No interaction occurs when disabled	High
TC-006	Verify callback execution	Callback prop passed	1. Pass mock function 2. Trigger event	Callback executes correctly	High
TC-007	Verify semantic/accessibility behavior	Component rendered	1. Query by role/label/semantic structure 2. Assert attributes	Accessibility behavior is correct	Medium
TC-008	Verify ref forwarding	Ref-supported component rendered	1. Pass ref 2. Render component 3. Assert DOM reference	Ref points to correct DOM node	Medium
TC-009	Verify default state behavior	Component has initial/default state	1. Render component 2. Inspect initial state	Default state behaves correctly	Medium
TC-010	Verify edge/error handling	Component has edge-case paths	1. Render with fallback/invalid/edge props 2. Assert safe behavior	Component handles edge cases safely	Medium

Unit Test Requirements

Components/Functions to Test:

Module/Component	Function/Hook	Test Cases to Cover
`Alert.tsx`	`Alert`, `AlertTitle`, `AlertDescription`	TC-001, TC-002, TC-003, TC-007, TC-008
`Button.tsx`	`Button`, `buttonVariants`	TC-001, TC-002, TC-003, TC-004, TC-005, TC-008
`Card.tsx`	`Card`, `CardHeader`, `CardTitle`, `CardDescription`, `CardContent`, `CardFooter`	TC-001, TC-002, TC-008
`Carousel.tsx`	`Carousel` and subcomponents	TC-001, TC-004, TC-005, TC-006, TC-009, TC-010
`AspectRatio.tsx`	`AspectRatio`	TC-001, TC-002, TC-008
`Calendar.tsx`	`Calendar`	TC-001, TC-002, TC-004, TC-010
`Chart.tsx`	`ChartContainer`, `ChartTooltip`, `ChartTooltipContent`, `ChartLegend`, `ChartLegendContent`	TC-001, TC-002, TC-007, TC-010
`Checkbox.tsx`	`Checkbox`	TC-001, TC-002, TC-004, TC-005, TC-006, TC-008, TC-009
`Collapsible.tsx`	`Collapsible`, `CollapsibleTrigger`, `CollapsibleContent`	TC-001, TC-004, TC-005, TC-006, TC-009

Test Assertions Required:

Renders correctly with initial state
Handles user input correctly
Validates input and shows errors
Calls API with correct payload
Handles loading state
Handles success response
Handles error response
Updates UI state appropriately

Implementation Details

Files to Change

File Path	Action	Purpose
`src/components/ui/alert.test.tsx`	Create/Modify	Unit tests for Alert components
`src/components/ui/button.test.tsx`	Create/Modify	Unit tests for Button component and variants
`src/components/ui/card.test.tsx`	Create/Modify	Unit tests for Card components
`src/components/ui/carousel.test.tsx`	Create/Modify	Unit tests for Carousel behavior and navigation
`src/components/ui/aspect-ratio.test.tsx`	Create/Modify	Unit tests for AspectRatio component
`src/components/ui/calendar.test.tsx`	Create/Modify	Unit tests for Calendar component
`src/components/ui/chart.test.tsx`	Create/Modify	Unit tests for Chart-related components
`src/components/ui/checkbox.test.tsx`	Create/Modify	Unit tests for Checkbox interactions and state
`src/components/ui/collapsible.test.tsx`	Create/Modify	Unit tests for Collapsible components

Technical Considerations

Tests are written using Vitest Component rendering and behavior are validated using React Testing Library Mock functions are used where callback validation is required Assertions focus on behavior, not just implementation details Shared UI components were prioritized due to their reuse across the app Accessibility-friendly selectors such as getByRole are used where applicable

UI/UX Requirements

Expected behavior: Components should render consistently Variants and styling props should apply correctly Interactive elements should respond properly to user actions Disabled states should prevent invalid interactions Components should maintain accessibility and semantic structure Shared UI behavior should remain stable across desktop/mobile/browser environments **Mockups/Wireframes: ** N/A — existing reusable UI library validation task

Testing Strategy

Manual Testing

Test Environment: Test Environment: Browser: Chrome, Firefox, Edge Viewport: Desktop, Mobile User Role: General application user / developer validation Manual Test Steps: Open screens/pages where shared UI components are used Verify rendering and behavior of buttons, alerts, cards, checkboxes, calendar, carousel, chart, and collapsible sections Confirm interaction, disabled states, accessibility, and layout consistency

Automated Testing

Unit Tests:

Component render tests
User interaction tests
API integration tests
Error handling tests

Integration Tests (if applicable):

Multi-component interaction tests
Route navigation tests

Test Data Requirements

const mockTestData = { buttonLabel: 'Click Me', alertTitle: 'Warning', alertDescription: 'Something went wrong', cardTitle: 'Sample Card', checkboxChecked: true, collapsibleContent: 'Hidden Content', calendarMonth: 'March 2026', chartConfig: { desktop: { label: 'Desktop', color: '#000' } } }

Definition of Done

Edited Mar 28, 2026 by ashritha kunjeti