test(workers): replace publisher mocks with Mox

lib/pleroma/web/federator.ex

@@ -89,7 +89,8 @@ defmodule Pleroma.Web.Federator do
 
   # Job Worker Callbacks
 
-  @spec perform(atom(), any()) :: {:ok, any()} | {:error, any()}
+  @impl true
+  @spec perform(atom(), any()) :: :ok | {:ok, any()} | {:error, any()}
   def perform(:publish_one, params) do
     Publisher.prepare_one(params)
     |> Publisher.publish_one()

lib/pleroma/web/federator/publishing.ex

@@ -3,5 +3,6 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.Federator.Publishing do
+  @callback perform(atom(), any()) :: :ok | {:ok, any()} | {:error, any()}
   @callback publish(map()) :: any()
 end

lib/pleroma/workers/publisher_worker.ex

@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Workers.PublisherWorker do
   alias Pleroma.Activity
+  alias Pleroma.Config
   alias Pleroma.Instances
   alias Pleroma.Web.Federator
 
@@ -19,7 +20,7 @@ defmodule Pleroma.Workers.PublisherWorker do
   @impl true
   def perform(%Job{args: %{"op" => "publish", "activity_id" => activity_id}}) do
     activity = Activity.get_by_id(activity_id)
-    Federator.perform(:publish, activity)
+    federator().perform(:publish, activity)
   end
 
   def perform(%Job{args: %{"op" => "publish_one", "params" => params}} = job) do
@@ -35,7 +36,7 @@ defmodule Pleroma.Workers.PublisherWorker do
     if not Instances.reachable?(params.inbox) do
       {:cancel, :unreachable}
     else
-      case Federator.perform(:publish_one, params) do
+      case federator().perform(:publish_one, params) do
         {:ok, _} ->
           :ok
 
@@ -57,6 +58,8 @@ defmodule Pleroma.Workers.PublisherWorker do
   @impl true
   def timeout(_job), do: :timer.seconds(10)
 
+  defp federator, do: Config.get([:pipeline, :federator], Federator)
+
   @base_backoff 15
   @pow 5
   @impl true