chore: import upstream snapshot with attribution

tests/test_error.py

@@ -0,0 +1,83 @@
+import pytest
+from application.error import bad_request, response_error, sanitize_api_error
+from flask import Flask
+
+
+@pytest.fixture
+def app():
+    app = Flask(__name__)
+    return app
+
+
+@pytest.mark.unit
+def test_bad_request_with_message(app):
+    with app.app_context():
+        message = "Invalid input"
+        response = bad_request(status_code=400, message=message)
+        assert response.status_code == 400
+        assert response.json == {"error": "Bad Request", "message": message}
+
+
+@pytest.mark.unit
+def test_bad_request_without_message(app):
+    with app.app_context():
+        response = bad_request(status_code=400)
+        assert response.status_code == 400
+        assert response.json == {"error": "Bad Request"}
+
+
+@pytest.mark.unit
+def test_response_error_with_message(app):
+    with app.app_context():
+        message = "Something went wrong"
+        response = response_error(code_status=500, message=message)
+        assert response.status_code == 500
+        assert response.json == {"error": "Internal Server Error", "message": message}
+
+
+@pytest.mark.unit
+def test_response_error_without_message(app):
+    with app.app_context():
+        response = response_error(code_status=500)
+        assert response.status_code == 500
+        assert response.json == {"error": "Internal Server Error"}
+
+
+@pytest.mark.unit
+class TestSanitizeApiError:
+
+    def test_503_unavailable(self):
+        assert "temporarily unavailable" in sanitize_api_error("503 Service Unavailable")
+
+    def test_high_demand(self):
+        assert "temporarily unavailable" in sanitize_api_error("high demand")
+
+    def test_429_rate_limit(self):
+        assert "Rate limit" in sanitize_api_error("429 Too Many Requests")
+
+    def test_quota_exceeded(self):
+        assert "Rate limit" in sanitize_api_error("Quota exceeded")
+
+    def test_401_unauthorized(self):
+        assert "Authentication" in sanitize_api_error("401 Unauthorized")
+
+    def test_invalid_api_key(self):
+        assert "Authentication" in sanitize_api_error("Invalid API key provided")
+
+    def test_timeout(self):
+        assert "timed out" in sanitize_api_error("Request timed out")
+
+    def test_connection_error(self):
+        assert "Network" in sanitize_api_error("Connection refused")
+
+    def test_long_message_sanitized(self):
+        assert "error occurred" in sanitize_api_error("x" * 201)
+
+    def test_traceback_sanitized(self):
+        assert "error occurred" in sanitize_api_error("Traceback (most recent call)")
+
+    def test_json_sanitized(self):
+        assert "error occurred" in sanitize_api_error('{"error": "something"}')
+
+    def test_short_safe_message_passed_through(self):
+        assert sanitize_api_error("Something broke") == "Something broke"