pytest-extended-data

pytest-extended-data publishes reusable pytest fixtures and assertions for projects built on extended-data.

Install it in test environments:

uv add --dev pytest-extended-data

The plugin is exposed through the standard pytest11 entry point. It provides:

• extended_data_factory: the ExtendedData polymorphic constructor.
• extended_data_payload: a small nested mapping payload for examples and smoke tests.
• extended_data_value: the payload wrapped as an ExtendedData value.
• assert_extended_shape(value, shape): assertion helper for shape checks.
• assert_builtin_round_trip(value, expected): assertion helper for export-boundary checks.

Use the fixtures as consumer-facing contract checks, rather than duplicating private container implementation details in every downstream package:

def test_configuration_boundary(extended_data_value):
    assert extended_data_value["service"]["name"] == "api"
    assert extended_data_value.as_builtin() == {
        "service": {"name": "api", "ports": [8080, 8443]},
        "enabled": True,
    }

The runtime package deliberately has no pytest plugin. Install this package only in test environments so production dependencies remain focused on data handling.

See the Package Surface guide for the runtime and plugin split.