Add scheduler for sending scheduled activities to the queue

test/scheduled_activity_worker_test.exs

@@ -0,0 +1,19 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2018 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.ScheduledActivityWorkerTest do
+  use Pleroma.DataCase
+  alias Pleroma.ScheduledActivity
+  import Pleroma.Factory
+
+  test "creates a status from the scheduled activity" do
+    user = insert(:user)
+    scheduled_activity = insert(:scheduled_activity, user: user, params: %{status: "hi"})
+    Pleroma.ScheduledActivityWorker.perform(:execute, scheduled_activity.id)
+
+    refute Repo.get(ScheduledActivity, scheduled_activity.id)
+    activity = Repo.all(Pleroma.Activity) |> Enum.find(&(&1.actor == user.ap_id))
+    assert activity.data["object"]["content"] == "hi"
+  end
+end