Skip tests if alexander koch robot is not available

tests/conftest.py

@@ -13,8 +13,25 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+import pytest
+
 from .utils import DEVICE
 
 
 def pytest_collection_finish():
     print(f"\nTesting with {DEVICE=}")
+
+
+@pytest.fixture(scope="session")
+def is_koch_available():
+    try:
+        from lerobot.common.robot_devices.robots.factory import make_robot
+
+        robot = make_robot("koch")
+        robot.connect()
+        del robot
+        return True
+    except Exception as e:
+        print("An alexander koch robot is not available.")
+        print(e)
+        return False