Better tests directory structure (#2231)

tests/image_specific_tests/docker-stacks-foundation/test_package_managers.py

@@ -0,0 +1,22 @@
+# Copyright (c) Jupyter Development Team.
+# Distributed under the terms of the Modified BSD License.
+import pytest  # type: ignore
+
+from tests.utils.run_command import run_command
+from tests.utils.tracked_container import TrackedContainer
+
+
+@pytest.mark.parametrize(
+    "package_manager_command",
+    [
+        "apt --version",
+        "conda --version",
+        "mamba --version",
+        "pip --version",
+    ],
+)
+def test_package_manager(
+    container: TrackedContainer, package_manager_command: str
+) -> None:
+    """Test that package managers are installed and run."""
+    run_command(container, package_manager_command)