Add a way to easily test units

test/helpers.py

@@ -50,7 +50,8 @@ class CondaPackageHelper:
         """Start the TrackedContainer and return an instance of a running container"""
         LOGGER.info(f"Starting container {container.image_name} ...")
         return container.run(
-            tty=True, command=["start.sh", "bash", "-c", "sleep infinity"]
+            tty=True,
+            command=["start.sh", "bash", "-c", "sleep infinity"]
         )
 
     @staticmethod

test/test_units.py

@@ -0,0 +1,33 @@
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+
+import logging
+import os
+
+LOGGER = logging.getLogger(__name__)
+THIS_DIR = os.path.dirname(os.path.realpath(__file__))
+
+
+def test_units(container):
+    """Various units tests
+    Add a py file in the {image}/test/units dir and it will be automatically tested
+    """
+    host_data_dir = os.path.join(THIS_DIR, "../", container.image_name(), "test/units")
+    cont_data_dir = "/home/jovyan/data"
+
+    if not os.path.exists(host_data_dir):
+        LOGGER.info(f"Not found unit tests for image: {container.image_name()}")
+        return
+
+    command = "sleep infinity"
+    running_container = container.run(
+        volumes={host_data_dir: {"bind": cont_data_dir, "mode": "ro"}},
+        tty=True,
+        command=["start.sh", "bash", "-c", command],
+    )
+    for test_file in os.listdir(host_data_dir):
+        LOGGER.info("Running unit test: {test_file}")
+        command = f"python {cont_data_dir}/{test_file}"
+        cmd = running_container.exec_run(command)
+        assert cmd.exit_code == 0, f"Command {command} failed"
+        LOGGER.debug(cmd.output.decode("utf-8"))