content: """Common test utilities for MCP server tests."""
  
  import socket
  import time
  
  
  def wait_for_server(port: int, timeout: float = 20.0) -> None:
      """Wait for server to be ready to accept connections.
  
      Polls the server port until it accepts connections or timeout is reached.
      This eliminates race conditions without arbitrary sleeps.
  
      Args:
          port: The port number to check
          timeout: Maximum time to wait in seconds (default 5.0)
  
      Raises:
          TimeoutError: If server doesn't start within the timeout period
      """
      start_time = time.time()
      while time.time() - start_time < timeout:
          try:
              with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as s:
                  s.settimeout(0.1)
                  s.connect(("127.0.0.1", port))
                  # Server is ready
                  return
          except (ConnectionRefusedError, OSError):
              # Server not ready yet, retry quickly
              time.sleep(0.01)
      raise TimeoutError(f"Server on port {port} did not start within {timeout} seconds")  # pragma: no cover
  