use pydantic for version, added a test

mapping_provider/api/common.py

-from importlib.metadata import PackageNotFoundError, version
+from importlib.metadata import version
 
 from fastapi import APIRouter
+from pydantic import BaseModel
 
 router = APIRouter()
 
 
+class Version(BaseModel):
+    module: str
+    api: str
+
+
 @router.get("/version")
-def get_version() -> dict[str, str]:
-    """Get the version of the package."""
-    try:
-        return {"version": version("mapping_provider")}
-    except PackageNotFoundError:
-        return {"version": "unknown"}
+def get_version() -> Version:
+    """
+    handler for /version
+    """
+    return Version(
+        module = version('mapping_provider'),
+        api = '0.1'
+    )

requirements.txt

 fastapi
 uvicorn[standard]
+requests
+jsonschema
+
+httpx  # required for fastapi TestClient
+pytest
+responses
 
 sphinx
 sphinx-rtd-theme

test/conftest.py

+from fastapi.testclient import TestClient
+import pytest
+
+from mapping_provider import create_app
+
+
+@pytest.fixture
+def client():
+    return TestClient(create_app())

test/test_version.py

+from mapping_provider.api.common import Version
+
+
+def test_version(client):
+    rv = client.get("/version")
+    assert rv.status_code == 200
+    assert rv.json()
+    Version.model_validate(rv.json())