Improve docs and testing clarity

README.md

@@ -30,6 +30,7 @@ python src/webcam_rest_node.py --host 0.0.0.0 --port 2000
 3. Open the `.env` file and ensure that all values are set and correct.
     1. Check that the `USER_ID` and `GROUP_ID` are correct, as these ensure correct file permissions (in most cases, they should match your user's UID and GID)
     2. Check that the `WEI_DATA_DIR` and `REDIS_DIR` directories exist and have the appropriate permissions
+    3. The `DEVICE` variable can be used to determine which camera device is used by the module
 
 ```bash
 # Build and run just the module

example.env

@@ -1,6 +1,7 @@
 # Note: all paths are relative to the docker compose file
 USER_ID=
 GROUP_ID=
+DEVICE=/dev/video0
 PROJECT_PATH=
 PROJECT_VERSION=1.2.0
 WEI_DATA_DIR=~/.wei

tests/test_module.py

@@ -53,7 +53,7 @@ class TestWebcamModule(TestWEI_Base):
 
     def test_take_picture_action(self):
         """Tests that the take_picture action works"""
-        exp = ExperimentClient(self.server_host, self.server_port, "")
+        exp = ExperimentClient(self.server_host, self.server_port, "webcam_module_test")
 
         result = exp.start_run(
             Path(self.root_dir) / Path("tests/workflow_defs/test_workflow.yaml"),