2 files changed, 65 insertions, 0 deletions
diff --git a/test/web/activity_pub/activity_pub_test.exs b/test/web/activity_pub/activity_pub_test.exs
index 1520ffc4b..f3951462f 100644
--- a/test/web/activity_pub/activity_pub_test.exs
+++ b/test/web/activity_pub/activity_pub_test.exs
@@ -2056,4 +2056,46 @@ defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
       assert [%{activity_id: ^id_create}] = Pleroma.ActivityExpiration |> Repo.all()
     end
   end
+
+  describe "handling of clashing nicknames" do
+    test "renames an existing user with a clashing nickname and a different ap id" do
+      orig_user =
+        insert(
+          :user,
+          local: false,
+          nickname: "admin@mastodon.example.org",
+          ap_id: "http://mastodon.example.org/users/harinezumigari"
+        )
+
+      %{
+        nickname: orig_user.nickname,
+        ap_id: orig_user.ap_id <> "part_2"
+      }
+      |> ActivityPub.maybe_handle_clashing_nickname()
+
+      user = User.get_by_id(orig_user.id)
+
+      assert user.nickname == "#{orig_user.id}.admin@mastodon.example.org"
+    end
+
+    test "does nothing with a clashing nickname and the same ap id" do
+      orig_user =
+        insert(
+          :user,
+          local: false,
+          nickname: "admin@mastodon.example.org",
+          ap_id: "http://mastodon.example.org/users/harinezumigari"
+        )
+
+      %{
+        nickname: orig_user.nickname,
+        ap_id: orig_user.ap_id
+      }
+      |> ActivityPub.maybe_handle_clashing_nickname()
+
+      user = User.get_by_id(orig_user.id)
+
+      assert user.nickname == orig_user.nickname
+    end
+  end
 end
diff --git a/test/web/activity_pub/transmogrifier_test.exs b/test/web/activity_pub/transmogrifier_test.exs
index f7b7d1a9f..248b410c6 100644
--- a/test/web/activity_pub/transmogrifier_test.exs
+++ b/test/web/activity_pub/transmogrifier_test.exs
@@ -774,6 +774,29 @@ defmodule Pleroma.Web.ActivityPub.TransmogrifierTest do
       assert [user.follower_address] == activity.data["to"]
     end
 
+    test "it correctly processes messages with weirdness in address fields" do
+      user = insert(:user)
+
+      message = %{
+        "@context" => "https://www.w3.org/ns/activitystreams",
+        "to" => [nil, user.follower_address],
+        "cc" => ["https://www.w3.org/ns/activitystreams#Public", ["¿"]],
+        "type" => "Create",
+        "object" => %{
+          "content" => "…",
+          "type" => "Note",
+          "attributedTo" => user.ap_id,
+          "inReplyTo" => nil
+        },
+        "actor" => user.ap_id
+      }
+
+      assert {:ok, activity} = Transmogrifier.handle_incoming(message)
+
+      assert ["https://www.w3.org/ns/activitystreams#Public"] == activity.data["cc"]
+      assert [user.follower_address] == activity.data["to"]
+    end
+
     test "it accepts Move activities" do
       old_user = insert(:user)
       new_user = insert(:user)