import pytest

rclpy = pytest.importorskip('rclpy')


def test_face_fps_can_be_changed_live_and_is_clamped():
    from rclpy.parameter import Parameter
    from hermes_face.face_node import FaceNode
    rclpy.init(args=['--ros-args', '-p', 'output:=none'])
    try:
        node = FaceNode()
        assert node.fps == 30.0
        assert node.set_parameters([Parameter('fps', value=12.0)])[0].successful and node.fps == 12.0
        assert node.set_parameters([Parameter('fps', value=500.0)])[0].successful and node.fps == 60.0   # clamped
        assert not node.set_parameters([Parameter('fps', value='fast')])[0].successful
        node.destroy_node()
    finally:
        rclpy.shutdown()