add testing to fastapi

fastapi/app/tests/test_main.py

@@ -0,0 +1,10 @@
+from fastapi.testclient import TestClient
+
+from app.main import app
+
+client = TestClient(app)
+
+def test_get_authors():
+    response = client.get("/comic/artists")
+    assert response.status_code == 200
+    assert len(response.json()) == 5