Simplify test for the tljh_post_install hook

integration-tests/plugins/simplest/tljh_simplest.py

@@ -1,9 +1,6 @@
 """
 Simplest plugin that exercises all the hooks
 """
-from textwrap import dedent
-
-from tljh import systemd
 from tljh.hooks import hookimpl
 
 
@@ -47,17 +44,5 @@ def tljh_custom_jupyterhub_config(c):
 
 @hookimpl
 def tljh_post_install():
-    post_install_service = dedent("""
-    [Unit]
-    Description=Post Install Test Service
-
-    [Service]
-    ExecStart=ls
-
-    [Install]
-    WantedBy=multi-user.target
-    """)
-    service = "post-install-test.service"
-    systemd.install_unit(service, post_install_service)
-    systemd.enable_service(service)
-    systemd.reload_daemon()
+    with open('test_post_install', 'w') as f:
+        f.write('123456789')

integration-tests/test_simplest_plugin.py

@@ -6,7 +6,6 @@ import requests
 import os
 import subprocess
 from tljh.config import CONFIG_FILE, USER_ENV_PREFIX, HUB_ENV_PREFIX
-from tljh.systemd import check_service_enabled
 
 yaml = YAML(typ='rt')
 
@@ -67,6 +66,9 @@ def test_jupyterhub_config_hook():
 
 def test_post_install_hook():
     """
-    Test that the post-install-test systemd service is enabled
+    Test that the test_post_install file has the correct content
     """
-    assert check_service_enabled("post-install-test")
+    with open("test_post_install") as f:
+        content = f.read()
+
+    assert content == "123456789"