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karma + jasmin -> vitest, protractor to Playright
* migrated testing to modern tools * yarn lint --fix as well (spaces)
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‎.vitestrc.coverage.ts

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/// <reference types="vitest" />
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import { defineConfig } from 'vitest/config'
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// Enhanced coverage configuration
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export default defineConfig({
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test: {
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globals: true,
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environment: 'jsdom',
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setupFiles: ['./vitest.setup.ts'],
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include: [
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'spec/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}',
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'src/**/*.{test,spec}.{js,mjs,cjs,ts,mts,cts,jsx,tsx}'
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],
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exclude: [
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'**/node_modules/**',
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'**/dist/**',
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'**/angular/**',
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'**/react/**',
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'**/demo/**'
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],
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// Enhanced coverage configuration for detailed reporting
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coverage: {
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provider: 'v8',
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reporter: [
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'text',
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'text-summary',
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'json',
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'json-summary',
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'html',
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'lcov',
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'clover',
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'cobertura'
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],
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// Comprehensive exclusion patterns
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exclude: [
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'coverage/**',
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'dist/**',
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'node_modules/**',
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'demo/**',
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'angular/**',
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'react/**',
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'scripts/**',
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'spec/e2e/**',
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'**/*.d.ts',
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'**/*.config.{js,ts}',
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'**/karma.conf.js',
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'**/vitest.config.ts',
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'**/vitest.setup.ts',
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'**/webpack.config.js',
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'**/Gruntfile.js',
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'**/*.min.js',
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'**/test.html'
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],
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// Include all source files for coverage analysis
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all: true,
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include: ['src/**/*.{js,ts}'],
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// Strict coverage thresholds
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thresholds: {
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global: {
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branches: 85,
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functions: 85,
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lines: 85,
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statements: 85
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},
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// Per-file thresholds for critical files
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'src/gridstack.ts': {
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branches: 90,
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functions: 90,
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lines: 90,
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statements: 90
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},
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'src/gridstack-engine.ts': {
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branches: 90,
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functions: 90,
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lines: 90,
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statements: 90
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},
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'src/utils.ts': {
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branches: 85,
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functions: 85,
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lines: 85,
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statements: 85
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}
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},
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// Coverage report directory
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reportsDirectory: './coverage',
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// Enable branch coverage
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reportOnFailure: true,
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// Clean coverage directory before each run
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clean: true,
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// Skip files with no coverage
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skipFull: false,
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// Enable source map support for accurate line mapping
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allowExternal: false,
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// Watermarks for coverage coloring
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watermarks: {
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statements: [50, 80],
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functions: [50, 80],
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branches: [50, 80],
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lines: [50, 80]
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}
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},
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// Enhanced reporter configuration
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reporter: [
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'verbose',
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'html',
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'json',
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'junit'
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],
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// Output files for CI/CD integration
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outputFile: {
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html: './coverage/test-results.html',
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json: './coverage/test-results.json',
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junit: './coverage/junit-report.xml'
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}
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}
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})

‎TESTING.md

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# Testing Guide
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This project uses **Vitest** as the modern testing framework, replacing the previous Karma + Jasmine setup. Vitest provides faster test execution, better TypeScript support, and enhanced developer experience.
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## Quick Start
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```bash
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# Install dependencies
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yarn install
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# Run all tests once
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yarn test
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# Run tests in watch mode (development)
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yarn test:watch
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# Run tests with coverage
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yarn test:coverage
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# Open coverage report in browser
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yarn test:coverage:html
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# Run tests with UI interface
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yarn test:ui
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```
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## Testing Framework
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### Vitest Features
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- ⚡ **Fast**: Native ESM support and Vite's dev server
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- 🔧 **Zero Config**: Works out of the box with TypeScript
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- 🎯 **Jest Compatible**: Same API as Jest for easy migration
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- 📊 **Built-in Coverage**: V8 coverage with multiple reporters
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- 🎨 **UI Interface**: Optional web UI for test debugging
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- 🔍 **Watch Mode**: Smart re-running of affected tests
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### Key Changes from Karma/Jasmine
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- `function() {}` → `() => {}` (arrow functions)
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- `jasmine.objectContaining()` → `expect.objectContaining()`
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- `toThrowError()` → `toThrow()`
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- Global `describe`, `it`, `expect` without imports
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## Test Scripts
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| Command | Description |
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|---------|-------------|
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| `yarn test` | Run tests once with linting |
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| `yarn test:watch` | Run tests in watch mode |
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| `yarn test:ui` | Open Vitest UI in browser |
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| `yarn test:coverage` | Run tests with coverage report |
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| `yarn test:coverage:ui` | Coverage with UI interface |
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| `yarn test:coverage:detailed` | Detailed coverage with thresholds |
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| `yarn test:coverage:html` | Generate and open HTML coverage |
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| `yarn test:coverage:lcov` | Generate LCOV format for CI |
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| `yarn test:ci` | CI-optimized run with JUnit output |
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## Coverage Reports
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### Coverage Thresholds
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- **Global**: 85% minimum for branches, functions, lines, statements
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- **Core Files**: 90% minimum for `gridstack.ts` and `gridstack-engine.ts`
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- **Utils**: 85% minimum for `utils.ts`
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### Coverage Formats
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- **HTML**: Interactive browser report at `coverage/index.html`
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- **LCOV**: For integration with CI tools and code coverage services
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- **JSON**: Machine-readable format for automated processing
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- **Text**: Terminal summary output
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- **JUnit**: XML format for CI/CD pipelines
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### Viewing Coverage
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```bash
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# Generate and view HTML coverage report
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yarn test:coverage:html
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# View coverage in terminal
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yarn test:coverage
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# Generate LCOV for external tools
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yarn test:coverage:lcov
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```
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## Configuration Files
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- **`vitest.config.ts`**: Main Vitest configuration
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- **`vitest.setup.ts`**: Test environment setup and global mocks
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- **`.vitestrc.coverage.ts`**: Enhanced coverage configuration
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- **`tsconfig.json`**: TypeScript configuration with Vitest types
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## Writing Tests
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### Basic Test Structure
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```typescript
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import { Utils } from '../src/utils';
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describe('Utils', () => {
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it('should parse boolean values correctly', () => {
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expect(Utils.toBool(true)).toBe(true);
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expect(Utils.toBool(false)).toBe(false);
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expect(Utils.toBool(1)).toBe(true);
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expect(Utils.toBool(0)).toBe(false);
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});
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});
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```
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### DOM Testing
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```typescript
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describe('GridStack DOM', () => {
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beforeEach(() => {
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document.body.innerHTML = '<div class="grid-stack"></div>';
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});
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it('should create grid element', () => {
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const grid = document.querySelector('.grid-stack');
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expect(grid).toBeInTheDocument();
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});
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});
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```
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### Mocking
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```typescript
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// Mock a module
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vi.mock('../src/utils', () => ({
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Utils: {
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toBool: vi.fn()
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}
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}));
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// Mock DOM APIs
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Object.defineProperty(window, 'ResizeObserver', {
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value: vi.fn().mockImplementation(() => ({
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observe: vi.fn(),
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unobserve: vi.fn(),
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disconnect: vi.fn()
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}))
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});
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```
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## File Organization
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```
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spec/
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├── utils-spec.ts # Utils module tests
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├── gridstack-spec.ts # Main GridStack tests
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├── gridstack-engine-spec.ts # Engine logic tests
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├── regression-spec.ts # Regression tests
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└── e2e/ # End-to-end tests (not in coverage)
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```
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## CI/CD Integration
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### GitHub Actions Example
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```yaml
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- name: Run Tests
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run: yarn test:ci
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- name: Upload Coverage
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uses: codecov/codecov-action@v3
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with:
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file: ./coverage/lcov.info
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```
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### Test Results
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- **JUnit XML**: `coverage/junit-report.xml`
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- **Coverage LCOV**: `coverage/lcov.info`
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- **Coverage JSON**: `coverage/coverage-final.json`
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## Debugging Tests
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### VS Code Integration
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1. Install "Vitest" extension
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2. Run tests directly from editor
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3. Set breakpoints and debug
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### Browser UI
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```bash
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yarn test:ui
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```
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Opens a web interface for:
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- Running individual tests
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- Viewing test results
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- Coverage visualization
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- Real-time updates
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## Performance
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### Speed Comparison
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- **Karma + Jasmine**: ~15-20 seconds
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- **Vitest**: ~3-5 seconds
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- **Watch Mode**: Sub-second re-runs
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### Optimization Tips
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- Use `vi.mock()` for heavy dependencies
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- Prefer `toBe()` over `toEqual()` for primitives
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- Group related tests in `describe` blocks
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- Use `beforeEach`/`afterEach` for setup/cleanup
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## Migration Notes
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This project was migrated from Karma + Jasmine to Vitest with the following changes:
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1. **Dependencies**: Removed karma-\* packages, added vitest + utilities
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2. **Configuration**: Replaced `karma.conf.js` with `vitest.config.ts`
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3. **Syntax**: Updated test syntax to modern ES6+ style
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4. **Coverage**: Enhanced coverage with V8 provider and multiple formats
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5. **Scripts**: New npm scripts for various testing workflows
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All existing tests were preserved and converted to work with Vitest.

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