Function check_server_alive

tests/security/conftest.py:127–181

Check if server is still alive after a test. Use this fixture to verify the server didn't crash. IMPORTANT: This checks if server is RESPONSIVE, not just if connection was closed. Defensive connection closures are GOOD security behavior, not crashes!

(api_server_required)

@pytest.fixture
def check_server_alive(api_server_required):
    """
    Check if server is still alive after a test.

    Use this fixture to verify the server didn't crash.

    IMPORTANT: This checks if server is RESPONSIVE, not just if connection
    was closed. Defensive connection closures are GOOD security behavior,
    not crashes!
    """

    def _check(wait_time=1.0):
        """
        Try to establish a NEW connection and execute a simple command.

        Args:
            wait_time: Time to wait before checking (allows server to recover)

        Returns:
            True if server is alive and responsive
            False if server crashed or is unresponsive
        """
        # Wait for server to recover from rate limiting / stress
        time.sleep(wait_time)

        # Try up to 3 times with increasing delays
        for attempt in range(3):
            try:
                client = SerialStudioClient(timeout=5.0)
                client.connect()

                # Execute simple command
                result = client.command("api.getCommands")

                client.disconnect()

                # Verify we got a valid response
                if isinstance(result, dict) or isinstance(result, list):
                    return True

            except ConnectionRefusedError:
                # Server not accepting connections - likely crashed
                if attempt == 2:  # Last attempt
                    return False
                time.sleep(2.0 * (attempt + 1))  # Exponential backoff

            except (ConnectionError, TimeoutError, Exception) as e:
                # Other errors might be rate limiting or temp issues
                if attempt == 2:  # Last attempt
                    return False
                time.sleep(2.0 * (attempt + 1))  # Exponential backoff

        return False

    return _check


@pytest.fixture(autouse=True)