Backup Tests: Split out async tests, use mox.

test/pleroma/user/backup_async_test.exs

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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2023 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.User.BackupAsyncTest do
+  use Pleroma.DataCase, async: true
+
+  import Pleroma.Factory
+  import Mox
+
+  alias Pleroma.User.Backup
+  alias Pleroma.User.Backup.ProcessorMock
+  alias Pleroma.UnstubbedConfigMock, as: ConfigMock
+
+  setup do
+    user = insert(:user, %{nickname: "cofe", name: "Cofe", ap_id: "http://cofe.io/users/cofe"})
+
+    {:ok, backup} = user |> Backup.new() |> Repo.insert()
+    %{backup: backup}
+  end
+
+  @tag capture_log: true
+  test "it handles unrecoverable exceptions", %{backup: backup} do
+    ProcessorMock
+    |> expect(:do_process, fn _, _ ->
+      raise "mock exception"
+    end)
+
+    ConfigMock
+    |> stub_with(Pleroma.Config)
+
+    {:error, %{backup: backup, reason: :exit}} = Backup.process(backup, ProcessorMock)
+
+    assert backup.state == :failed
+  end
+
+  @tag capture_log: true
+  test "it handles timeouts", %{backup: backup} do
+    ProcessorMock
+    |> expect(:do_process, fn _, _ ->
+      Process.sleep(:timer.seconds(4))
+    end)
+
+    ConfigMock
+    |> expect(:get, fn [Pleroma.User.Backup, :process_wait_time] -> :timer.seconds(2) end)
+
+    {:error, %{backup: backup, reason: :timeout}} = Backup.process(backup, ProcessorMock)
+
+    assert backup.state == :failed
+  end
+end