Merge branch 'feature/retry-queue' into 'develop'

Federator: add retry queue.

See merge request pleroma/pleroma!323

test/web/retry_queue_test.exs

@@ -0,0 +1,31 @@
+defmodule MockActivityPub do
+  def publish_one(ret) do
+    {ret, "success"}
+  end
+end
+
+defmodule Pleroma.ActivityTest do
+  use Pleroma.DataCase
+  alias Pleroma.Web.Federator.RetryQueue
+
+  @small_retry_count 0
+  @hopeless_retry_count 10
+
+  test "failed posts are retried" do
+    {:retry, _timeout} = RetryQueue.get_retry_params(@small_retry_count)
+
+    assert {:noreply, %{delivered: 1}} ==
+             RetryQueue.handle_info({:send, :ok, MockActivityPub, @small_retry_count}, %{
+               delivered: 0
+             })
+  end
+
+  test "posts that have been tried too many times are dropped" do
+    {:drop, _timeout} = RetryQueue.get_retry_params(@hopeless_retry_count)
+
+    assert {:noreply, %{dropped: 1}} ==
+             RetryQueue.handle_cast({:maybe_enqueue, %{}, nil, @hopeless_retry_count}, %{
+               dropped: 0
+             })
+  end
+end