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diff --git a/test/pleroma/web/activity_pub/mrf/steal_emoji_policy_test.exs b/test/pleroma/web/activity_pub/mrf/steal_emoji_policy_test.exs
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+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.StealEmojiPolicyTest do
+ use Pleroma.DataCase
+
+ alias Pleroma.Config
+ alias Pleroma.Web.ActivityPub.MRF.StealEmojiPolicy
+
+ setup_all do
+ Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
+ :ok
+ end
+
+ setup do
+ emoji_path = Path.join(Config.get([:instance, :static_dir]), "emoji/stolen")
+ File.rm_rf!(emoji_path)
+ File.mkdir!(emoji_path)
+
+ Pleroma.Emoji.reload()
+
+ on_exit(fn ->
+ File.rm_rf!(emoji_path)
+ end)
+
+ :ok
+ end
+
+ test "does nothing by default" do
+ installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
+ refute "firedfox" in installed_emoji
+
+ message = %{
+ "type" => "Create",
+ "object" => %{
+ "emoji" => [{"firedfox", "https://example.org/emoji/firedfox.png"}],
+ "actor" => "https://example.org/users/admin"
+ }
+ }
+
+ assert {:ok, message} == StealEmojiPolicy.filter(message)
+
+ installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
+ refute "firedfox" in installed_emoji
+ end
+
+ test "Steals emoji on unknown shortcode from allowed remote host" do
+ installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
+ refute "firedfox" in installed_emoji
+
+ message = %{
+ "type" => "Create",
+ "object" => %{
+ "emoji" => [{"firedfox", "https://example.org/emoji/firedfox.png"}],
+ "actor" => "https://example.org/users/admin"
+ }
+ }
+
+ clear_config([:mrf_steal_emoji, :hosts], ["example.org"])
+ clear_config([:mrf_steal_emoji, :size_limit], 284_468)
+
+ assert {:ok, message} == StealEmojiPolicy.filter(message)
+
+ installed_emoji = Pleroma.Emoji.get_all() |> Enum.map(fn {k, _} -> k end)
+ assert "firedfox" in installed_emoji
+ end
+end