WebPush: Return proper values for jobs.

lib/pleroma/web/push/impl.ex

@@ -55,11 +55,12 @@ def perform(
       |> Jason.encode!()
       |> push_message(build_sub(subscription), gcm_api_key, subscription)
     end
+    |> (&{:ok, &1}).()
   end
 
   def perform(_) do
     Logger.warn("Unknown notification type")
-    :error
+    {:error, :unknown_type}
   end
 
   @doc "Push message to web"

test/web/push/impl_test.exs

@@ -63,12 +63,12 @@ test "performs sending notifications" do
         activity: activity
       )
 
-    assert Impl.perform(notif) == [:ok, :ok]
+    assert Impl.perform(notif) == {:ok, [:ok, :ok]}
   end
 
   @tag capture_log: true
   test "returns error if notif does not match " do
-    assert Impl.perform(%{}) == :error
+    assert Impl.perform(%{}) == {:error, :unknown_type}
   end
 
   test "successful message sending" do