Tests restructuring

tests/system/__init__.py

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+# tests/system/__init__.py
+"""System-level tests - full application behavior."""
+

tests/system/conftest.py

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+# tests/system/conftest.py
+"""System test specific fixtures."""
+import pytest
+
+# Add any system-specific fixtures here if needed
+

tests/system/test_error_handling.py

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+# tests/system/test_error_handling.py
+import pytest
+
+
+@pytest.mark.system
+class TestErrorHandling:
+    def test_invalid_json(self, client, auth_headers):
+        """Test handling of invalid JSON"""
+        response = client.post(
+            "/api/v1/product", headers=auth_headers, content="invalid json"
+        )
+
+        assert response.status_code == 422  # Validation error
+
+    def test_missing_required_fields(self, client, auth_headers):
+        """Test handling of missing required fields"""
+        response = client.post(
+            "/api/v1/product", headers=auth_headers, json={"title": "Test"}
+        )  # Missing product_id
+
+        assert response.status_code == 422
+
+    def test_invalid_authentication(self, client):
+        """Test handling of invalid authentication"""
+        response = client.get(
+            "/api/v1/product", headers={"Authorization": "Bearer invalid_token"}
+        )
+
+        assert response.status_code == 401  # Token is not valid
+
+    def test_nonexistent_resource(self, client, auth_headers):
+        """Test handling of nonexistent resource access"""
+        response = client.get("/api/v1/product/NONEXISTENT", headers=auth_headers)
+        assert response.status_code == 404
+
+        response = client.get("/api/v1/shop/NONEXISTENT", headers=auth_headers)
+        assert response.status_code == 404
+
+    def test_duplicate_resource_creation(self, client, auth_headers, test_product):
+        """Test handling of duplicate resource creation"""
+        product_data = {
+            "product_id": test_product.product_id,  # Duplicate ID
+            "title": "Another Product",
+        }
+
+        response = client.post(
+            "/api/v1/product", headers=auth_headers, json=product_data
+        )
+        assert response.status_code == 400
+
+    def test_server_error_handling(self, client, auth_headers):
+        """Test handling of server errors"""
+        # This would test 500 errors if you have endpoints that can trigger them
+        # For now, test that the error handling middleware works
+        response = client.get("/api/v1/nonexistent-endpoint", headers=auth_headers)
+        assert response.status_code == 404
+
+    def test_rate_limiting_behavior(self, client, auth_headers):
+        """Test rate limiting behavior if implemented"""
+        # Make multiple rapid requests to test rate limiting
+        responses = []
+        for i in range(10):
+            response = client.get("/api/v1/product", headers=auth_headers)
+            responses.append(response)
+
+        # All should succeed unless rate limiting is very aggressive
+        # Adjust based on your rate limiting configuration
+        success_count = sum(1 for r in responses if r.status_code == 200)
+        assert success_count >= 5  # At least half should succeed
+
+    def test_malformed_requests(self, client, auth_headers):
+        """Test handling of various malformed requests"""
+        # Test extremely long URLs
+        long_search = "x" * 10000
+        response = client.get(f"/api/v1/product?search={long_search}", headers=auth_headers)
+        # Should handle gracefully, either 200 with no results or 422 for too long
+        assert response.status_code in [200, 422]
+
+        # Test special characters in parameters
+        special_chars = "!@#$%^&*(){}[]|\\:;\"'<>,.?/~`"
+        response = client.get(f"/api/v1/product?search={special_chars}", headers=auth_headers)
+        # Should handle gracefully
+        assert response.status_code in [200, 422]
+
+    def test_database_error_recovery(self, client, auth_headers):
+        """Test application behavior during database issues"""
+        # This is more complex to test - you'd need to simulate DB issues
+        # For now, just test that basic operations work
+        response = client.get("/api/v1/product", headers=auth_headers)
+        assert response.status_code == 200
+
+    def test_content_type_errors(self, client, auth_headers):
+        """Test handling of incorrect content types"""
+        # Send XML to JSON endpoint
+        response = client.post(
+            "/api/v1/product",
+            headers={**auth_headers, "Content-Type": "application/xml"},
+            content="<xml>not json</xml>"
+        )
+        assert response.status_code in [400, 422, 415]  # Bad request or unsupported media type
+
+    def test_large_payload_handling(self, client, auth_headers):
+        """Test handling of unusually large payloads"""
+        # Create a very large product description
+        large_data = {
+            "product_id": "LARGE_TEST",
+            "title": "Large Test Product",
+            "description": "x" * 50000  # Very long description
+        }
+
+        response = client.post("/api/v1/product", headers=auth_headers, json=large_data)
+        # Should either accept it or reject with 422 (too large)
+        assert response.status_code in [200, 201, 422, 413]