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diff --git a/test/web/activity_pub/mrf/hellthread_policy_test.exs b/test/web/activity_pub/mrf/hellthread_policy_test.exs
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+++ b/test/web/activity_pub/mrf/hellthread_policy_test.exs
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+# Pleroma: A lightweight social networking server
+# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.MRF.HellthreadPolicyTest do
+  use Pleroma.DataCase
+  import Pleroma.Factory
+
+  import Pleroma.Web.ActivityPub.MRF.HellthreadPolicy
+
+  describe "hellthread filter tests" do
+    setup do
+      user = insert(:user)
+
+      message = %{
+        "actor" => user.ap_id,
+        "cc" => [user.follower_address],
+        "type" => "Create",
+        "to" => [
+          "https://www.w3.org/ns/activitystreams#Public",
+          "https://instace.tld/users/user1",
+          "https://instace.tld/users/user2",
+          "https://instace.tld/users/user3"
+        ]
+      }
+
+      [user: user, message: message]
+    end
+
+    test "reject test", %{message: message} do
+      Pleroma.Config.put([:mrf_hellthread], %{delist_threshold: 0, reject_threshold: 2})
+
+      {:reject, nil} = filter(message)
+    end
+
+    test "delist test", %{user: user, message: message} do
+      Pleroma.Config.put([:mrf_hellthread], %{delist_threshold: 2, reject_threshold: 0})
+
+      {:ok, message} = filter(message)
+      assert user.follower_address in message["to"]
+      assert "https://www.w3.org/ns/activitystreams#Public" in message["cc"]
+    end
+
+    test "threshold test", %{message: message} do
+      Pleroma.Config.put([:mrf_hellthread], %{delist_threshold: 0, reject_threshold: 3})
+
+      {:ok, _} = filter(message)
+    end
+  end
+end