house keeping

backend/api/signals/user.py

@@ -7,17 +7,22 @@
 
 from codeforlife.models.signals.pre_save import previous_values_are_unequal
 from codeforlife.user.models import User
-from django.db.models.signals import pre_save
+from django.db.models.signals import post_save, pre_save
 from django.dispatch import receiver
 
 # pylint: disable=unused-argument
 
 
 @receiver(pre_save, sender=User)
-def user__pre_save(sender, instance: User, *args, **kwargs):
-    """User's pre-save logic."""
+def user__pre_save__email(sender, instance: User, *args, **kwargs):
+    """Before a user's email field is updated."""
 
     if previous_values_are_unequal(instance, {"email"}):
         instance.username = instance.email
 
-        # TODO: send verification email
+
+@receiver(post_save, sender=User)
+def user__post_save__email(sender, instance: User, *args, **kwargs):
+    """After a user's email field is updated."""
+
+    # TODO: send verification email

backend/api/tests/signals/test_user.py

@@ -18,4 +18,9 @@ def test_pre_save__email(self):
         user.save()
         assert user.username == email
 
-        # TODO: assert verification email is sent.
+    def test_post_save__email(self):
+        """
+        Updating the email field sends a verification email.
+        """
+
+        raise NotImplementedError()  # TODO