adding test to check if container deleted files on container bind mount

base-notebook/test/test_container_options.py

@@ -187,3 +187,29 @@ def test_group_add(container, tmpdir):
     assert rv == 0 or rv["StatusCode"] == 0
     logs = c.logs(stdout=True).decode("utf-8")
     assert "uid=1010 gid=1010 groups=1010,100(users)" in logs
+
+def test_container_not_delete_bind_mount(container, tmp_path):
+    """Container should not delete files when using the -v bind mount flag
+    and mappint to /home/jovyan.
+    """
+    d = tmp_path / "data"
+    d.mkdir()
+    p = d / "foo.txt"
+    p.write_text("some-content")
+    
+    c = container.run(
+        tty=True,
+        user="root",
+        working_dir="/home/",
+        environment=[
+            "NB_USER=user",
+            "CHOWN_HOME=yes",
+        ],
+        volumes={ d : {'bind': '/home/jovyan/data', 'mode': 'rw'}},
+        command=["start.sh", "jupyter", "lab"]
+    )
+
+    time.sleep(10)
+    
+    assert p.read_text() == "some-content"
+    assert len(list(tmp_path.iterdir())) == 1