Send delete event over Mastodon streaming api

Closes #116

test/web/streamer_test.exs

@@ -6,7 +6,8 @@ defmodule Pleroma.Web.StreamerTest do
   use Pleroma.DataCase
 
   alias Pleroma.Web.Streamer
-  alias Pleroma.{List, User}
+  alias Pleroma.List
+  alias Pleroma.User
   alias Pleroma.Web.CommonAPI
   import Pleroma.Factory
 
@@ -35,6 +36,28 @@ defmodule Pleroma.Web.StreamerTest do
     Streamer.push_to_socket(topics, "public", activity)
 
     Task.await(task)
+
+    task =
+      Task.async(fn ->
+        assert_receive {:text, _}, 4_000
+      end)
+
+    fake_socket = %{
+      transport_pid: task.pid,
+      assigns: %{
+        user: user
+      }
+    }
+
+    {:ok, activity} = CommonAPI.delete(activity.id, other_user)
+
+    topics = %{
+      "public" => [fake_socket]
+    }
+
+    Streamer.push_to_socket(topics, "public", activity)
+
+    Task.await(task)
   end
 
   test "it doesn't send to blocked users" do