Add code + tests for adding items to a list

integration-tests/test_hub.py

@@ -4,7 +4,10 @@
 import secrets
 import pytest
 from functools import partial
+import asyncio
 import pwd
+import grp
+import sys
 
 
 def test_hub_up():
@@ -29,4 +32,35 @@ async def test_user_code_execute():
             await u.assert_code_output("5 * 4", "20", 5, 5)
 
             # Assert that the user exists
-            assert pwd.getpwnam(f'jupyter-{username}') is not None
+            assert pwd.getpwnam(f'jupyter-{username}') is not None
+
+
+@pytest.mark.asyncio
+async def test_user_admin_code():
+    """
+    User logs in, starts a server & executes code
+    """
+    # This *must* be localhost, not an IP
+    # aiohttp throws away cookies if we are connecting to an IP!
+    hub_url = 'http://localhost'
+    username = secrets.token_hex(8)
+
+    tljh_config_path = [sys.executable, '-m', 'tljh.config']
+
+    assert 0 == await (await asyncio.create_subprocess_exec(*tljh_config_path, 'add-item', 'users.admin', username)).wait()
+    assert 0 == await (await asyncio.create_subprocess_exec(*tljh_config_path, 'reload')).wait()
+
+    # FIXME: wait for reload to finish & hub to come up
+    # Should be present in reload
+    await asyncio.sleep(1)
+    async with User(username, hub_url, partial(login_dummy, password='')) as u:
+            await u.login()
+            await u.ensure_server()
+            await u.start_kernel()
+            await u.assert_code_output("5 * 4", "20", 5, 5)
+
+            # Assert that the user exists
+            assert pwd.getpwnam(f'jupyter-{username}') is not None
+
+            # Assert that the user has admin rights
+            assert f'jupyter-{username}' in grp.getgrnam('jupyterhub-admins').gr_mem

tests/test_config.py

@@ -51,6 +51,36 @@ def test_set_overwrite():
     assert new_conf == {'a': 'hi'}
 
 
+def test_add_to_config_one_level():
+    conf = {}
+
+    new_conf = config.add_item_to_config(conf, 'a.b', 'c')
+    assert new_conf == {
+        'a': {'b': ['c']}
+    }
+
+
+def test_add_to_config_zero_level():
+    conf = {}
+
+    new_conf = config.add_item_to_config(conf, 'a', 'b')
+    assert new_conf == {
+        'a': ['b']
+    }
+
+def test_add_to_config_multiple():
+    conf = {}
+
+    new_conf = config.add_item_to_config(conf, 'a.b.c', 'd')
+    assert new_conf == {
+        'a': {'b': {'c': ['d']}}
+    }
+
+    new_conf = config.add_item_to_config(new_conf, 'a.b.c', 'e')
+    assert new_conf == {
+        'a': {'b': {'c': ['d', 'e']}}
+    }
+
 def test_show_config():
     """
     Test stdout output when showing config

tljh/config.py

@@ -27,14 +27,14 @@ def set_item_in_config(config, property_path, value):
 
     config is not mutated.
 
-    propert_path is a series of dot separated values. Any part of the path
+    property_path is a series of dot separated values. Any part of the path
     that does not exist is created. 
     """
     path_components = property_path.split('.')
 
     # Mutate a copy of the config, not config itself
     cur_part = config_copy = deepcopy(config)
-    for i in range(len(path_components)):
+    for i, cur_path in enumerate(path_components):
         cur_path = path_components[i]
         if i == len(path_components) - 1:
             # Final component
@@ -49,6 +49,34 @@ def set_item_in_config(config, property_path, value):
     return config_copy
 
 
+def add_item_to_config(config, property_path, value):
+    """
+    Add an item to a list in config.
+    """
+    path_components = property_path.split('.')
+
+    # Mutate a copy of the config, not config itself
+    cur_part = config_copy = deepcopy(config)
+    for i, cur_path in enumerate(path_components):
+        if i == len(path_components) - 1:
+            # Final component, it must be a list and we append to it
+            print('l', cur_path, cur_part)
+            if cur_path not in cur_part or not isinstance(cur_part[cur_path], list):
+                cur_part[cur_path] = []
+            cur_part = cur_part[cur_path]
+
+            cur_part.append(value)
+        else:
+            # If we are asked to create new non-leaf nodes, we will always make them dicts
+            # This means setting is *destructive* - will replace whatever is down there!
+            print('p', cur_path, cur_part)
+            if cur_path not in cur_part or not isinstance(cur_part[cur_path], dict):
+                cur_part[cur_path] = {}
+            cur_part = cur_part[cur_path]
+
+    return config_copy
+
+
 def show_config(config_path):
     """
     Pretty print config from given config_path
@@ -80,6 +108,22 @@ def set_config_value(config_path, key_path, value):
         yaml.dump(config, f)
 
 
+def add_config_value(config_path, key_path, value):
+    """
+    Add value to list at key_path
+    """
+    # FIXME: Have a file lock here
+    # FIXME: Validate schema here
+    try:
+        with open(config_path) as f:
+            config = yaml.load(f)
+    except FileNotFoundError:
+        config = {}
+
+    config = add_item_to_config(config, key_path, value)
+
+    with open(config_path, 'w') as f:
+        yaml.dump(config, f)
 
 def reload_component(component):
     """
@@ -123,6 +167,19 @@ def main():
         help='Value ot set the configuration key to'
     )
 
+    add_item_parser = subparsers.add_parser(
+        'add-item',
+        help='Add a value to a list for a configuration property'
+    )
+    add_item_parser.add_argument(
+        'key_path',
+        help='Dot separated path to configuration key to set'
+    )
+    add_item_parser.add_argument(
+        'value',
+        help='Value ot set the configuration key to'
+    )
+
     reload_parser = subparsers.add_parser(
         'reload',
         help='Reload a component to apply configuration change'
@@ -141,10 +198,10 @@ def main():
         show_config(args.config_path)
     elif args.action == 'set':
         set_config_value(args.config_path, args.key_path, args.value)
+    elif args.action == 'add-item':
+        add_config_value(args.config_path, args.key_path, args.value)
     elif args.action == 'reload':
         reload_component(args.component)
 
 if __name__ == '__main__':
-    main()
-
-
+    main()