Improve Test Coverage for `DashboardPage.tsx` to 100%

Current Behavior: DashboardPage.tsx has partial test coverage with several uncovered lines and low function coverage.

Expected Behavior: Achieve 100% test coverage by covering all logic paths, UI states, and interactions.

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Problem Statement

• What is missing? Large portion of code (lines 506–698) is not covered by tests, including complex UI logic and event handling.

• Who is affected? Developers maintaining dashboard features and QA relying on coverage.

• Impact:

  • Potential hidden bugs
  • Low confidence in dashboard functionality
  • Risk during future updates

• Coverage Stats:

  • Statements: 75.67%
  • Branches: 90.69%
  • Functions: 64% ❗ (needs major improvement)
  • Lines: 75%

• Uncovered Lines: 506–698

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Proposed Solution

• Add unit tests using Vitest + React Testing Library

• Focus on:

  • Dashboard data rendering
  • Conditional UI blocks
  • Event handlers (filters, navigation, actions)
  • API success, error, and empty states

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Test-Driven Development

Acceptance Criteria (Given-When-Then)

Scenario 1: Dashboard Loads Successfully

Given dashboard API returns valid data
 When the page is rendered
 Then dashboard metrics and charts should be displayed

Scenario 2: Loading State

Given dashboard data is being fetched
 When the page renders
 Then a loading indicator should be visible

Scenario 3: Empty Data State

Given dashboard API returns no data
 When the page renders
 Then an empty state message should be shown

Scenario 4: API Error Handling

Given dashboard API fails
 When the page renders
 Then an error message should be displayed

Scenario 5: User Interaction (Filters / Actions)

Given dashboard is loaded
 When user applies filters or clicks actions
 Then UI should update accordingly

Scenario 6: Function Execution Coverage

Given dashboard helper functions exist
 When triggered by UI or lifecycle
 Then all functions should execute and return expected results

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Test Cases

Test ID	Test Description	Precondition	Test Steps	Expected Result	Priority
TC-001	Render dashboard data	API success	1. Mock data 2. Render	Data visible	High
TC-002	Loading state	API pending	1. Render	Loader shown	High
TC-003	Empty state	No data	1. Mock empty	Empty message	High
TC-004	API error	API fails	1. Mock error	Error UI	High
TC-005	Filter interaction	Dashboard loaded	1. Apply filter	UI updates	Medium
TC-006	Function execution	Component active	1. Trigger logic	Functions covered	High

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Unit Test Requirements

Components/Functions to Test:

Module/Component	Function/Hook	Test Cases
DashboardPage.tsx	Rendering logic	TC-001, TC-002, TC-003
	API handling	TC-004
	Interaction handlers	TC-005
	Internal functions	TC-006

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Test Assertions Required:

• Renders dashboard correctly
• Displays loading state
• Handles empty state
• Handles API errors
• Executes all functions
• Updates UI on user interaction

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Implementation Details

Files to Change

File Path	Action	Purpose
src/pages/DashboardPage.tsx	Modify	Improve testability if needed
src/__tests__/DashboardPage.test.tsx	Create/Modify	Add test cases

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Technical Considerations

• Use vi.mock() for API mocking
• Use waitFor() for async behavior
• Use userEvent for interactions
• Ensure full function coverage

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UI/UX Requirements

• Validate:

  • Charts rendering
  • Dashboard metrics display
  • Filters and interactions

• Ensure accessibility compliance

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Testing Strategy

Manual Testing

Environment:

• Browser: Chrome
• Viewport: Desktop
• Role: Admin

Steps:

1. Open dashboard page
2. Verify data loads
3. Apply filters
4. Check error handling

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Automated Testing

• Component render tests
• Interaction tests
• API tests
• Function coverage tests

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Test Data

const mockDashboardData = {
  totalDoctors: 10,
  totalPatients: 50,
  totalAppointments: 20,
};

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Definition of Done

• Coverage reaches 100%
• All uncovered lines (506–698) tested
• Function coverage improved to 100%
• All tests pass
• No dummy tests

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Additional Context

Notes

• Focus heavily on:

  • Lines 506–698
  • Function coverage (currently 64%)

• Avoid shallow testing

• Ensure real user scenarios are covered

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