Test Fixing Skill

Diagnose and fix failing tests automatically using error analysis and intelligent refactoring.

When to Use

• Failing test suite
• Flaky tests
• Test maintenance
• CI/CD pipeline failures

Core Capabilities

• Error analysis and root cause identification
• Assertion updates
• Mock/stub fixing
• Timeout adjustments
• Race condition detection
• Test data refresh
• Dependency updates

Common Fixes

// Fix 1: Update assertion
- expect(result).toBe(5);
+ expect(result).toBe(6); // Updated expected value

// Fix 2: Add async/await
- it('should fetch data', () => {
-   const data = fetchData();
+ it('should fetch data', async () => {
+   const data = await fetchData();

// Fix 3: Fix mock
- jest.mock('./api');
+ jest.mock('./api', () => ({
+   fetchUser: jest.fn().mockResolvedValue({ id: 1 })
+ }));

// Fix 4: Increase timeout
- it('slow test', () => {
+ it('slow test', () => {
+   jest.setTimeout(10000);

Best Practices

• Analyze error messages first
• Check for environmental issues
• Update test data regularly
• Fix flaky tests immediately
• Run tests in isolation

Resources

• Jest: https://jestjs.io/
• Testing Library: https://testing-library.com/