Merge branch 'feature/mrf-anti-link-spam' into 'develop'

implement anti link spam MRF

See merge request pleroma/pleroma!1307

test/web/activity_pub/mrf/anti_link_spam_policy_test.exs

@@ -0,0 +1,140 @@
+# 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.AntiLinkSpamPolicyTest do
+  use Pleroma.DataCase
+  import Pleroma.Factory
+
+  alias Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicy
+
+  @linkless_message %{
+    "type" => "Create",
+    "object" => %{
+      "content" => "hi world!"
+    }
+  }
+
+  @linkful_message %{
+    "type" => "Create",
+    "object" => %{
+      "content" => "<a href='https://example.com'>hi world!</a>"
+    }
+  }
+
+  @response_message %{
+    "type" => "Create",
+    "object" => %{
+      "name" => "yes",
+      "type" => "Answer"
+    }
+  }
+
+  describe "with new user" do
+    test "it allows posts without links" do
+      user = insert(:user)
+
+      assert user.info.note_count == 0
+
+      message =
+        @linkless_message
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, _message} = AntiLinkSpamPolicy.filter(message)
+    end
+
+    test "it disallows posts with links" do
+      user = insert(:user)
+
+      assert user.info.note_count == 0
+
+      message =
+        @linkful_message
+        |> Map.put("actor", user.ap_id)
+
+      {:reject, _} = AntiLinkSpamPolicy.filter(message)
+    end
+  end
+
+  describe "with old user" do
+    test "it allows posts without links" do
+      user = insert(:user, info: %{note_count: 1})
+
+      assert user.info.note_count == 1
+
+      message =
+        @linkless_message
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, _message} = AntiLinkSpamPolicy.filter(message)
+    end
+
+    test "it allows posts with links" do
+      user = insert(:user, info: %{note_count: 1})
+
+      assert user.info.note_count == 1
+
+      message =
+        @linkful_message
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, _message} = AntiLinkSpamPolicy.filter(message)
+    end
+  end
+
+  describe "with followed new user" do
+    test "it allows posts without links" do
+      user = insert(:user, info: %{follower_count: 1})
+
+      assert user.info.follower_count == 1
+
+      message =
+        @linkless_message
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, _message} = AntiLinkSpamPolicy.filter(message)
+    end
+
+    test "it allows posts with links" do
+      user = insert(:user, info: %{follower_count: 1})
+
+      assert user.info.follower_count == 1
+
+      message =
+        @linkful_message
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, _message} = AntiLinkSpamPolicy.filter(message)
+    end
+  end
+
+  describe "with unknown actors" do
+    test "it rejects posts without links" do
+      message =
+        @linkless_message
+        |> Map.put("actor", "http://invalid.actor")
+
+      {:reject, _} = AntiLinkSpamPolicy.filter(message)
+    end
+
+    test "it rejects posts with links" do
+      message =
+        @linkful_message
+        |> Map.put("actor", "http://invalid.actor")
+
+      {:reject, _} = AntiLinkSpamPolicy.filter(message)
+    end
+  end
+
+  describe "with contentless-objects" do
+    test "it does not reject them or error out" do
+      user = insert(:user, info: %{note_count: 1})
+
+      message =
+        @response_message
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, _message} = AntiLinkSpamPolicy.filter(message)
+    end
+  end
+end