exercise single-user help output

and tweak some of its output

jupyterhub/singleuser.py

@@ -9,6 +9,7 @@ import os
 from jinja2 import ChoiceLoader, FunctionLoader
 
 from tornado import ioloop
+from textwrap import dedent
 
 try:
     import notebook
@@ -31,6 +32,7 @@ from notebook.notebookapp import (
 from notebook.auth.login import LoginHandler
 from notebook.auth.logout import LogoutHandler
 
+from jupyterhub import __version__
 from .services.auth import HubAuth, HubAuthenticated
 from .utils import url_path_join
 
@@ -117,6 +119,17 @@ def _exclude_home(path_list):
 
 class SingleUserNotebookApp(NotebookApp):
     """A Subclass of the regular NotebookApp that is aware of the parent multiuser context."""
+    description = dedent("""
+    Single-user server for JupyterHub. Extends the Jupyter Notebook server.
+    
+    Meant to be invoked by JupyterHub Spawners, and not directly.
+    """)
+    
+    examples = ""
+    subcommands = {}
+    version = __version__
+    classes = NotebookApp.classes + [HubAuth]
+
     user = CUnicode(config=True)
     def _user_changed(self, name, old, new):
         self.log.name = new

jupyterhub/tests/test_singleuser.py

@@ -1,10 +1,15 @@
 """Tests for jupyterhub.singleuser"""
 
+from subprocess import check_output
+import sys
+
 import requests
 
+import jupyterhub
 from .mocking import TestSingleUserSpawner, public_url
 from ..utils import url_path_join
 
+
 def test_singleuser_auth(app, io_loop):
     # use TestSingleUserSpawner to launch a single-user app in a thread
     app.spawner_class = TestSingleUserSpawner
@@ -32,6 +37,7 @@ def test_singleuser_auth(app, io_loop):
     r = requests.get(url_path_join(url, 'logout'), cookies=cookies)
     assert len(r.cookies) == 0
 
+
 def test_disable_user_config(app, io_loop):
     # use TestSingleUserSpawner to launch a single-user app in a thread
     app.spawner_class = TestSingleUserSpawner
@@ -56,3 +62,13 @@ def test_disable_user_config(app, io_loop):
     r.raise_for_status()
     assert r.url.rstrip('/').endswith('/user/nandy/tree')
     assert r.status_code == 200
+
+
+def test_help_output():
+    out = check_output([sys.executable, '-m', 'jupyterhub.singleuser', '--help-all']).decode('utf8', 'replace')
+    assert 'JupyterHub' in out
+
+def test_version():
+    out = check_output([sys.executable, '-m', 'jupyterhub.singleuser', '--version']).decode('utf8', 'replace')
+    assert jupyterhub.__version__ in out
+