change(fastapi): remove sqlite support

Signed-off-by: Kevin Morris <kevr@0cost.org>

aurweb/asgi.py

@@ -48,6 +48,12 @@ async def app_startup():
         "TEST_RECURSION_LIMIT", sys.getrecursionlimit()))
     sys.setrecursionlimit(recursion_limit)
 
+    backend = aurweb.config.get("database", "backend")
+    if backend not in aurweb.db.DRIVERS:
+        raise ValueError(
+            f"The configured database backend ({backend}) is unsupported. "
+            f"Supported backends: {str(aurweb.db.DRIVERS.keys())}")
+
     session_secret = aurweb.config.get("fastapi", "session_secret")
     if not session_secret:
         raise Exception("[fastapi] session_secret must not be empty")

test/test_asgi.py

@@ -45,3 +45,20 @@ async def test_asgi_http_exception_handler():
     response = await aurweb.asgi.http_exception_handler(None, exc)
     assert response.body.decode() == \
         f"<h1>{exc.status_code} {phrase}</h1><p>{exc.detail}</p>"
+
+
+@pytest.mark.asyncio
+async def test_asgi_app_unsupported_backends():
+    config_get = aurweb.config.get
+
+    # Test that the previously supported "sqlite" backend is now
+    # unsupported by FastAPI.
+    def mock_sqlite_backend(section: str, key: str):
+        if section == "database" and key == "backend":
+            return "sqlite"
+        return config_get(section, key)
+
+    with mock.patch("aurweb.config.get", side_effect=mock_sqlite_backend):
+        expr = r"^.*\(sqlite\) is unsupported.*$"
+        with pytest.raises(ValueError, match=expr):
+            await aurweb.asgi.app_startup()