Add tests to verify error response format for endpoints.

tests/test_error_response_format.py

@@ -0,0 +1,81 @@
+import pytest
+from .conftest import BASE_URL
+
+
+class TestErrorResponseFormat:
+    """Tests for error response format"""
+
+    def test_error_response_structure_for_general(self, api_client):
+        """Verify error response structure for /general endpoint"""
+        payload = {
+            "text": "text",
+            "texts": ["texts"],
+            "entities": ["org"]
+        }
+        response = api_client.post(f"{BASE_URL}/general", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert "code" in error["error"]
+        assert "message" in error["error"]
+        assert "details" in error["error"]
+        assert isinstance(error["error"]["code"], str)
+        assert isinstance(error["error"]["message"], str)
+        assert isinstance(error["error"]["details"], dict)
+
+    def test_error_response_structure_for_relation_extraction(self, api_client):
+        """Verify error response structure for /relation-extraction endpoint"""
+        payload = {
+            "text": "some text",
+            "texts": ["another text"],
+            "relations": ["founded"]
+        }
+        response = api_client.post(f"{BASE_URL}/relation-extraction", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert "code" in error["error"]
+        assert "message" in error["error"]
+        assert "details" in error["error"]
+        assert error["error"]["code"] == "INVALID_INPUT"
+        assert "both" in error["error"]["message"].lower()
+
+    def test_error_response_structure_for_summarization(self, api_client):
+        """Verify error response structure for /summarization endpoint"""
+        payload = {
+            "text": "some text",
+            "texts": ["another text"]
+        }
+        response = api_client.post(f"{BASE_URL}/summarization", json=payload)
+        assert response.status_code == 400
+
+        error = response.json()
+        assert "error" in error
+        assert "code" in error["error"]
+        assert "message" in error["error"]
+        assert "details" in error["error"]
+        assert error["error"]["code"] == "INVALID_INPUT"
+        assert "both" in error["error"]["message"].lower()
+
+    def test_consistent_error_format_across_endpoints(self, api_client):
+        """Ensure all endpoints return consistent error format"""
+        # Prepare payloads with both text and texts for each endpoint
+        test_cases = [
+            ("/general", {"text": "t", "texts": ["t"], "entities": ["org"]}),
+            ("/relation-extraction", {"text": "t", "texts": ["t"], "relations": ["rel"]}),
+            ("/summarization", {"text": "t", "texts": ["t"]})
+        ]
+
+        for endpoint, payload in test_cases:
+            response = api_client.post(f"{BASE_URL}{endpoint}", json=payload)
+            assert response.status_code == 400, f"Endpoint {endpoint} should return 400"
+
+            error = response.json()
+            # Verify consistent error structure
+            assert "error" in error, f"Endpoint {endpoint} missing 'error' key"
+            assert "code" in error["error"], f"Endpoint {endpoint} missing 'code' key"
+            assert "message" in error["error"], f"Endpoint {endpoint} missing 'message' key"
+            assert "details" in error["error"], f"Endpoint {endpoint} missing 'details' key"
+            assert error["error"]["code"] == "INVALID_INPUT", f"Endpoint {endpoint} wrong error code"