Project Non-Goals

Karva does not plan to support the features below. Other pytest features may also be unsupported; absence from this list does not mean support is planned.

Class-Based Tests

Karva will not collect or run class-based tests.

Unsupported patterns include:

• class TestSomething: with test_* methods
• unittest.TestCase subclasses
• xUnit-style setup_method, teardown_method, setup_class, and teardown_class
• class-scoped fixture behavior

Use module-level test functions and fixtures instead:

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import karva


@karva.fixture
def service():
    return Service()


def test_service_handles_empty_input(service):
    assert service.handle("") == []

Classes are still fine as application code or local helpers inside tests. Only classes as the test structure are out of scope.

Pytest Request Internals

Karva will not expose pytest's request fixture or the FixtureRequest API.

Unsupported patterns include:

• request.param
• request.getfixturevalue(...)
• request.addfinalizer(...)
• request.node, request.config, and other pytest collection internals
• pytestconfig
• pytest_generate_tests

Use explicit fixture dependencies, generator fixtures, and normal configuration inputs instead:

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import karva


@karva.fixture
def database():
    db = connect()
    yield db
    db.close()


def test_query(database):
    assert database.query("select 1") == 1

Pytest Plugin Compatibility

Karva does not support pytest plugins or hooks. Common plugin features may be built into Karva directly.