fix unit tests

src/reactive/neutron_arista_handlers.py

@@ -26,6 +26,7 @@ import charm.openstack.neutron_arista as arista  # noqa
 
 use_defaults('update-status')
 
+
 @reactive.when_not('arista-package.installed')
 @reactive.when('neutron-plugin-api-subordinate.available')
 def install_arista():
@@ -33,6 +34,7 @@ def install_arista():
         charm_class.install()
     reactive.set_state('arista-package.installed')
 
+
 @reactive.when('neutron-plugin-api-subordinate.connected')
 def configure_principle(api_principle):
     inject_config = {

unit_tests/test_neutron_arista_handlers.py

@@ -15,6 +15,8 @@ class TestRegisteredHooks(test_utils.TestRegisteredHooks):
             'when': {
                 'configure_principle': (
                     'neutron-plugin-api-subordinate.connected', ),
+                'install_arista': (
+                    'neutron-plugin-api-subordinate.available', )
             }
         }
         # test that the hooks were registered via the