Skip tests if alexander koch robot is not available

tests/test_cameras.py

@@ -3,6 +3,7 @@ import pytest
 
 from lerobot.common.robot_devices.cameras.opencv import OpenCVCamera, save_images_from_cameras
 from lerobot.common.robot_devices.utils import RobotDeviceAlreadyConnectedError, RobotDeviceNotConnectedError
+from tests.utils import require_koch
 
 CAMERA_INDEX = 2
 # Maximum absolute difference between two consecutive images recored by a camera.
@@ -14,7 +15,8 @@ def compute_max_pixel_difference(first_image, second_image):
     return np.abs(first_image.astype(float) - second_image.astype(float)).max()
 
 
-def test_camera():
+@require_koch
+def test_camera(request):
     """Test assumes that `camera.read()` returns the same image when called multiple times in a row.
     So the environment should not change (you shouldnt be in front of the camera) and the camera should not be moving.
 
@@ -118,5 +120,6 @@ def test_camera():
     del camera
 
 
-def test_save_images_from_cameras(tmpdir):
+@require_koch
+def test_save_images_from_cameras(tmpdir, request):
     save_images_from_cameras(tmpdir, record_time_s=1)