add test for route aliases

lib/pleroma/web/plugs/http_signature_plug.ex

@@ -27,7 +27,7 @@ def call(conn, _opts) do
     end
   end
 
-  defp route_aliases(%{path_info: ["objects", id]} = conn) do
+  def route_aliases(%{path_info: ["objects", id]} = conn) do
     ap_id = Router.Helpers.o_status_url(Pleroma.Web.Endpoint, :object, id)
 
     with %Activity{} = activity <- Activity.get_by_object_ap_id_with_object(ap_id) do
@@ -37,7 +37,7 @@ defp route_aliases(%{path_info: ["objects", id]} = conn) do
     end
   end
 
-  defp route_aliases(_), do: []
+  def route_aliases(_), do: []
 
   defp assign_valid_signature_on_route_aliases(conn, []), do: conn
 

test/pleroma/web/plugs/http_signature_plug_test.exs

@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Web.Plugs.HTTPSignaturePlugTest do
   use Pleroma.Web.ConnCase
+  import Pleroma.Factory
   alias Pleroma.Web.Plugs.HTTPSignaturePlug
 
   import Plug.Conn
@@ -81,5 +82,14 @@ test "halts the connection when `signature` header is not present", %{conn: conn
       assert conn.state == :sent
       assert conn.resp_body == "Request not signed"
     end
+
+    test "aliases redirected /object endpoints", _ do
+      obj = insert(:note)
+      act = insert(:note_activity, note: obj)
+      params = %{"actor" => "http://mastodon.example.org/users/admin"}
+      path = URI.parse(obj.data["id"]).path
+      conn = build_conn(:get, path, params)
+      assert ["/notice/#{act.id}"] == HTTPSignaturePlug.route_aliases(conn)
+    end
   end
 end