Add basic tests framework

tests/test_v13.py

@@ -0,0 +1,17 @@
+import pytest
+import json
+import pathlib
+from pydantic_spaceapi.v13 import SpaceAPIv13Model
+
+@pytest.fixture
+def valid_v13():
+    file = pathlib.Path("tests/examples/valid_v13.json")  
+    with open(file) as f:  
+        return json.loads(f.read())
+
+def test_working(valid_v13):
+    """
+    Check that we can parse a valid v13 definition
+    """
+    obj = SpaceAPIv13Model(**valid_v13)
+    assert isinstance(obj, SpaceAPIv13Model)