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"""Performance test configuration and fixtures. Provides utilities for measuring middleware overhead, response times, and ensuring no performance degradation from feature changes. """ import time from collections.abc import Callable from typing import Any import pytest from fastapi.testclient import TestClient from src.api.main import app @pytest.fixture def test_client() -> TestClient: """Create FastAPI TestClient for performance tests. Returns: TestClient configured with the FastAPI app """ return TestClient(app) @pytest.fixture def performance_threshold_ms() -> int: """Define acceptable response time threshold. Returns: Maximum acceptable response time in milliseconds (500ms target) """ return 500 @pytest.fixture def measure_response_time() -> Callable[[Callable[[], Any]], float]: """Create a utility function to measure response time. Returns: Function that measures execution time of a callable in milliseconds """ def _measure(func: Callable[[], Any]) -> float: """Measure execution time of a function. Args: func: Function to measure Returns: Execution time in milliseconds """ start_time = time.perf_counter() func() end_time = time.perf_counter() return (end_time - start_time) * 1000 # Convert to ms return _measure @pytest.fixture def valid_api_key() -> str: """Provide a valid API key for authenticated performance tests. Returns: Test API key that passes authentication """ return "mcp_test_key_for_performance_testing_12345" @pytest.fixture def auth_headers(valid_api_key: str) -> dict[str, str]: """Create authentication headers for performance tests. Args: valid_api_key: Valid API key fixture Returns: Dictionary with X-API-Key header """ return {"X-API-Key": valid_api_key}