Add tests for the plugin mechanism

integration-tests/plugins/simplest/tljh_simplest.py

@@ -0,0 +1,33 @@
+"""
+Simplest plugin that excercises all the hooks
+"""
+from tljh.hooks import hookimpl
+
+
+@hookimpl
+def tljh_extra_user_conda_packages():
+    return [
+        'hypothesis',
+    ]
+
+
+@hookimpl
+def tljh_extra_user_pip_packages():
+    return [
+        'django',
+    ]
+
+
+@hookimpl
+def tljh_extra_apt_packages():
+    return [
+        'sl',
+    ]
+
+
+@hookimpl
+def tljh_config_post_install(config):
+    # Put an arbitrary marker we can test for
+    config['simplest_plugin'] = {
+        'present': True
+    }