Test Suite: Accordion.svelte

[sm17p]

Add Comprehensive Accordion Component Tests

Overview

This PR introduces a complete test suite for the Accordion component, covering both unit tests and browser-based integration tests.

What's Changed

🧪 Test Coverage Added

• Constructor & Initialization: Tests default and custom prop handling, including getter functions
• State Management: Comprehensive coverage of expand/collapse operations in both single and multiple modes
• Accessibility: ARIA attributes, keyboard navigation, and screen reader compatibility
• User Interactions: Click handling, keyboard shortcuts, and focus management
• Disabled States: Both item-level and accordion-level disabled functionality

🏗️ Test Architecture

The test suite is organized into logical sections:

1. Unit Tests (Accordion class)

   • Constructor validation
   • State management methods
   • Attribute generation
   • Callback handling

2. Component Tests (AccordionItem class)

   • Item-specific state management
   • ARIA attribute correctness
   • Event handler functionality

3. Integration Tests (Browser-based)

   • Real user interactions
   • Keyboard navigation
   • Focus management
   • Accessibility compliance

🔧 Key Features Tested

State Management

• Single Selection Mode: Only one item can be expanded at a time
• Multiple Selection Mode: Multiple items can be expanded simultaneously
• Toggle Behavior: Proper expand/collapse state transitions

Keyboard Navigation

• Space/Enter: Toggle expansion
• Home: Focus first item
• End: Focus last item
• Arrow Up/Down: Navigate between items

🎯 Browser Testing

• Real DOM Interactions: Tests actual click and keyboard events
• Focus Management: Validates proper focus handling during navigation
• State Synchronization: Ensures UI state matches component state
• Multiple Browser Support: Tests run in both Chromium and Firefox

🛡️ Edge Cases Covered

• Disabled States: Both accordion-level and item-level disabling
• Getter Functions: Dynamic prop evaluation
• State Persistence: Proper cleanup and initialization
• Event Propagation: Correct handling of user events

Implementation Details

Test Structure

describe("Accordion", () => {
  // Core functionality tests
  describe("State Management", () => {
    // Svelte 5 $effect.root for proper cleanup
    let cleanupEffect: () => void;
    
    beforeEach(() => {
      cleanupEffect = $effect.root(() => {
        accordion = new Accordion();
      });
    });
    
    afterEach(() => {
      cleanupEffect();
    });
  });
});

Browser Test Integration

describe("Accordion User Interactions (Browser)", () => {
  testWithEffect("should handle click interactions", async () => {
    const { container } = render(AccordionTest, { items });
    
    const buttons = page.getByRole("button");
    const allButtons = await buttons.all();
    
    // Test real user interactions
    await allButtons[0]?.click();
    expect(allButtons[0]).toHaveAttribute("data-state", "open");
  });
});

Quality Assurance

• ✅ All tests pass in both Chromium and Firefox
• ✅ Real DOM interactions tested
• ✅ Edge cases covered (disabled states, focus management)
• ✅ Accessibility compliance verified

Future Considerations

• Had problems setting up axe-core accessibility automated testing, will add that later in another PR

Breaking Changes

None.

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Name	Status	Preview	Comments	Updated (UTC)
next-gen	✅ Ready (Inspect)	Visit Preview	💬 Add feedback	Jul 4, 2025 11:05am

[changeset-bot]

🦋 Changeset detected

Latest commit: 6f8cdde

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
melt	Patch

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[sm17p]

I'm happy with my changes here

[TGlide]

Thank you! Just 2 small changes needed

[TGlide]

No need for changesets here, these are just for version bumps. since the source code did not change, and the tests dont get shipped, its okay to leave it :)

[TGlide]

Actually you did change something, so lets just change the text

[sm17p]

You're right, completely missed that. Thank you for pointing it out, I'll update the text over here and push a new commit