from pathlib import Path

import pytest

from orisys import Sensor


def test_compute_deformation_requires_get_img(sensor_factory):
    sensor = sensor_factory(backend="cpu")
    try:
        with pytest.raises(Exception):
            sensor.compute_deformation(check_motion=False)
    finally:
        sensor.disconnect()


def test_invalid_video_source_raises():
    bad_path = Path("this_video_file_should_not_exist_123456.mp4")
    with pytest.raises(Exception):
        sensor = Sensor(vid_src=str(bad_path), verbose=False, backend="cpu")
        sensor.disconnect()


def test_repeated_connect_disconnect(sensor_factory):
    for _ in range(3):
        sensor = sensor_factory(backend="cpu")
        try:
            img = sensor.get_img()
            assert img is not None
            sensor.compute_deformation(check_motion=False)
        finally:
            sensor.disconnect()