implement reactive.Endpoint.manage_flags to clear flags on departed hook

Change-Id: Ie2e6d8ec460311fa4e63335f322aaae07dca5842

src/lib/base_requires.py

@@ -72,6 +72,16 @@ def changed(self):
             else:
                 log("incomplete request. broker_req not found")
 
+    def manage_flags(self):
+        """
+        Set states corresponding to the data we have.
+        """
+        reactive.toggle_flag(
+            self.expand_name("{endpoint_name}.connected"), self.is_joined
+        )
+        if not self.is_joined:
+            self.broken()
+
     def broken(self):
         reactive.clear_flag(
             self.expand_name('{endpoint_name}.available'))

unit_tests/test_requires.py

@@ -180,6 +180,16 @@ def test_date_changed_existing_broker_rq_incomplete(self):
         # Side effect of asserting pools.available was not set.
         self.set_flag.assert_called_once_with('some-relation.available')
 
+    def test_manage_flags(self):
+        self.cr.manage_flags()
+        self.clear_flag.assert_has_calls(
+            [
+                mock.call("some-relation.available"),
+                mock.call("some-relation.connected"),
+                mock.call("some-relation.pools.available"),
+            ]
+        )
+
     def test_broken(self):
         self.cr.broken()
         self.clear_flag.assert_has_calls([