Fix post tests, don't reply to self

activities/views/compose.py

@@ -87,6 +87,7 @@ class Compose(FormView):
                 # Build a set of mentions for the content to start as
                 mentioned = {self.reply_to.author}
                 mentioned.update(self.reply_to.mentions.all())
+                mentioned.discard(self.request.identity)
                 initial["text"] = "".join(
                     f"@{identity.handle} " for identity in mentioned
                 )

tests/activities/models/test_post.py

@@ -8,7 +8,7 @@ from activities.models import Post, PostStates
 
 
 @pytest.mark.django_db
-def test_fetch_post(httpx_mock: HTTPXMock):
+def test_fetch_post(httpx_mock: HTTPXMock, config_system):
     """
     Tests that a post we don't have locally can be fetched by by_object_uri
     """