import json
import os


def test_registry_loads():
    path = os.path.join(os.path.dirname(__file__), "..", "meshviz", "contracts", "registry.json")
    path = os.path.normpath(path)
    with open(path, "r") as f:
        data = json.load(f)
    assert "datasets" in data
    assert isinstance(data["datasets"], list)