Test Generation
Generate complete test file ready to run.
Coverage Requirements
- •Edge cases: Empty inputs, nil/null, boundary values, zero, negative
- •Failure modes: Invalid inputs, network errors, timeouts, exceptions
- •Boundary conditions: Off-by-one, max/min values, empty collections
Do NOT only test happy path.
Patterns
| Language | Framework | Style |
|---|---|---|
| Python | pytest | @pytest.mark.parametrize, fixtures, unittest.mock |
| Go | testing | Table-driven with t.Run, testify for mocks |
| JS/TS | vitest | describe/it, vi.mock |
| Rust | built-in | #[test], #[should_panic] |
Structure (Python)
python
import pytest
from unittest.mock import Mock, patch
@pytest.fixture
def mock_db():
return Mock()
class TestUserService:
@pytest.mark.parametrize("email,valid", [
("user@example.com", True),
("invalid", False),
("", False),
])
def test_validate_email(self, email, valid):
assert validate_email(email) == valid
def test_create_user_duplicate_raises(self, mock_db):
mock_db.exists.return_value = True
with pytest.raises(DuplicateError):
create_user(mock_db, "existing@example.com")
Output
Complete test file with imports, fixtures, mocks, and all test cases.