Add test for nbextensions too

integration-tests/test_hub.py

@@ -112,6 +112,7 @@ def test_serverextensions():
     """
     Validate serverextensions we want are installed
     """
+    # jupyter-serverextension writes to stdout and stderr weirdly
     proc = subprocess.run([
         '/opt/tljh/user/bin/jupyter-serverextension',
         'list', '--sys-prefix'
@@ -126,3 +127,23 @@ def test_serverextensions():
 
     for e in extensions:
         assert '{} \x1b[32mOK\x1b[0m'.format(e) in proc.stderr.decode()
+
+def test_nbextensions():
+    """
+    Validate nbextensions we want are installed & enabled
+    """
+    # jupyter-nbextension writes to stdout and stderr weirdly
+    proc = subprocess.run([
+        '/opt/tljh/user/bin/jupyter-nbextension',
+        'list', '--sys-prefix'
+    ], stderr=subprocess.PIPE, stdout=subprocess.PIPE)
+
+    extensions = [
+        'nbresuse/main',
+    ]
+
+    for e in extensions:
+        assert '{} \x1b[32m enabled \x1b[0m'.format(e) in proc.stdout.decode()
+
+    # Ensure we have 'OK' messages in our stdout, to make sure everything is importable
+    proc.stderr.decode() == '      - Validating: \x1b[32mOK\x1b[0m\n' * len(extensions)