Try to test new user create hook

integration-tests/plugins/simplest/tljh_simplest.py

@@ -46,3 +46,9 @@ def tljh_custom_jupyterhub_config(c):
 def tljh_post_install():
     with open('test_post_install', 'w') as f:
         f.write('123456789')
+
+
+@hookimpl
+def tljh_new_user_create(username):
+    with open('test_new_user_create', 'w') as f:
+        f.write("a new userfile")

integration-tests/test_simplest_plugin.py

@@ -72,3 +72,13 @@ def test_post_install_hook():
         content = f.read()
 
     assert content == "123456789"
+
+
+def test_tljh_new_user_create():
+    """
+    Test that plugin receives username as arg
+    """
+    with open("test_new_user_create") as f:
+        content = f.read()
+
+    assert content == "a new userfile"