Better tests directory structure (#2231)

tests/utils/run_command.py

@@ -0,0 +1,22 @@
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+import logging
+
+from tests.utils.tracked_container import TrackedContainer
+
+LOGGER = logging.getLogger(__name__)
+
+
+def run_command(
+    container: TrackedContainer,
+    command: str,
+    timeout: int = 5,
+) -> str:
+    """Runs the given package manager with its version argument."""
+
+    LOGGER.info(f"Test that the command '{command}' is working properly ...")
+    return container.run_and_wait(
+        timeout=timeout,
+        tty=True,
+        command=["bash", "-c", command],
+    )