Comprehensive testing infrastructure for reliable FlagFlow development
FlagFlow includes a comprehensive testing infrastructure built on modern testing frameworks and tools. The testing system supports unit testing, integration testing, and end-to-end testing with isolated state management and in-memory mocking capabilities.
Testing Philosophy: FlagFlow's testing infrastructure emphasizes test isolation, comprehensive coverage, and developer-friendly testing utilities for reliable development workflows.
The testing architecture provides multiple levels of testing with proper isolation and mocking:
// Test setup with isolated environment
import { beforeEach, afterEach, describe, it, expect } from 'vitest';
import { render, cleanup } from '@testing-library/svelte';
import { MockPersistentService } from './mocks/MockPersistentService';
import { InMemoryPersistentEngine } from './engines/InMemoryPersistentEngine';
describe('FlagFlow Component Tests', () => {
let mockService: MockPersistentService;
beforeEach(() => {
// Create isolated test environment
mockService = new MockPersistentService(
new InMemoryPersistentEngine()
);
// Setup test data
mockService.setFlags({
'feature.enabled': true,
'config.maxRetries': 5
});
});
afterEach(() => {
cleanup();
mockService.reset();
});
it('should render flag-dependent component correctly', () => {
const { getByTestId } = render(MyComponent, {
props: { flagService: mockService }
});
expect(getByTestId('feature-content')).toBeInTheDocument();
});
});FlagFlow's testing infrastructure provides complete test isolation through in-memory state management, ensuring tests are independent and reliable:
Provides isolated, in-memory storage for each test run, eliminating cross-test contamination and external dependencies.
Wraps the InMemoryPersistentEngine to provide a service-layer interface for testing with full API compatibility.
FlagFlow provides several commands for running different types of tests:
# Run all tests npm test # Run tests with UI interface npm run test:ui # Run tests with coverage report npm run test:coverage # Run tests in watch mode (development) npm run test:watch # Run specific test file npm test -- flag-service.test.ts # Run tests matching pattern npm test -- --grep="flag validation"
Tests are configured through vitest.config.ts with optimized settings for FlagFlow
development:
// vitest.config.ts
import { defineConfig } from 'vitest/config';
import { sveltekit } from '@sveltejs/kit/vite';
export default defineConfig({
plugins: [sveltekit()],
test: {
environment: 'jsdom',
setupFiles: ['tests/setup.ts'],
coverage: {
reporter: ['text', 'html', 'json'],
exclude: [
'node_modules/**',
'tests/**',
'**/*.d.ts',
'build/**'
]
},
globals: true,
alias: {
'$lib': './src/lib',
'$components': './src/components'
}
}
});