feat: implement blog project with CI pipeline

tests/unit/test_error_handler.py

@@ -0,0 +1,110 @@
+from datetime import datetime, timezone
+from unittest.mock import Mock, patch
+
+import pytest
+from fastapi import FastAPI, Request
+from starlette.exceptions import HTTPException
+
+from app.common.error_handler import (
+    ErrorResponse,
+    app_exception_handler,
+    http_exception_handler,
+    register_exception_handlers,
+)
+from app.core.exceptions import AppException
+
+
+class TestErrorResponse:
+    def test_error_response_creation(self) -> None:
+        response = ErrorResponse(
+            status_code=400,
+            message="Bad request",
+            timestamp=datetime.now(timezone.utc).isoformat(),
+        )
+        assert response.status_code == 400
+        assert response.message == "Bad request"
+        assert response.details is None
+
+    def test_error_response_with_details(self) -> None:
+        response = ErrorResponse(
+            status_code=500,
+            message="Internal error",
+            details={"field": "value"},
+            timestamp=datetime.now(timezone.utc).isoformat(),
+        )
+        assert response.status_code == 500
+        assert response.message == "Internal error"
+        assert response.details == {"field": "value"}
+
+
+class TestAppExceptionHandler:
+    @pytest.mark.asyncio
+    async def test_app_exception_handler(self) -> None:
+        request = Mock(spec=Request)
+        exc = AppException(message="Test error", status_code=400)
+
+        response = await app_exception_handler(request, exc)
+
+        assert response.status_code == 400
+        body = bytes(response.body).decode()
+        assert "Test error" in body
+        assert "400" in body
+
+    @pytest.mark.asyncio
+    async def test_app_exception_handler_content(self) -> None:
+        request = Mock(spec=Request)
+        exc = AppException(message="Validation error", status_code=422)
+
+        with patch("app.common.error_handler.datetime") as mock_datetime:
+            mock_datetime.now.return_value.isoformat.return_value = (
+                "2024-01-01T00:00:00"
+            )
+
+            response = await app_exception_handler(request, exc)
+
+            content = bytes(response.body).decode()
+            assert "Validation error" in content
+            assert "422" in content
+            assert "2024-01-01T00:00:00" in content
+
+
+class TestHttpExceptionHandler:
+    @pytest.mark.asyncio
+    async def test_http_exception_handler(self) -> None:
+        request = Mock(spec=Request)
+        exc = HTTPException(status_code=404, detail="Not found")
+
+        response = await http_exception_handler(request, exc)
+
+        assert response.status_code == 404
+        body = bytes(response.body).decode()
+        assert "Not found" in body
+        assert "404" in body
+
+    @pytest.mark.asyncio
+    async def test_http_exception_handler_content(self) -> None:
+        request = Mock(spec=Request)
+        exc = HTTPException(status_code=503, detail="Service unavailable")
+
+        with patch("app.common.error_handler.datetime") as mock_datetime:
+            mock_datetime.now.return_value.isoformat.return_value = (
+                "2024-01-01T12:00:00"
+            )
+
+            response = await http_exception_handler(request, exc)
+
+            content = bytes(response.body).decode()
+            assert "Service unavailable" in content
+            assert "503" in content
+            assert "2024-01-01T12:00:00" in content
+
+
+class TestRegisterExceptionHandlers:
+    def test_register_exception_handlers(self) -> None:
+        app = Mock(spec=FastAPI)
+
+        register_exception_handlers(app)
+
+        assert app.add_exception_handler.call_count == 2
+        app.add_exception_handler.assert_any_call(AppException, app_exception_handler)
+        app.add_exception_handler.assert_any_call(HTTPException, http_exception_handler)