Merge branch 'release/2.1.0' into 'stable'v2.1.0

Release/2.1.0

See merge request pleroma/pleroma!2927

18 files changed, 438 insertions, 67 deletions

diff --git a/test/web/activity_pub/mrf/activity_expiration_policy_test.exs b/test/web/activity_pub/mrf/activity_expiration_policy_test.exs
new file mode 100644
index 000000000..f25cf8b12
--- /dev/null
+++ b/test/web/activity_pub/mrf/activity_expiration_policy_test.exs
@@ -0,0 +1,84 @@
+# 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.ActivityExpirationPolicyTest do
+  use ExUnit.Case, async: true
+  alias Pleroma.Web.ActivityPub.MRF.ActivityExpirationPolicy
+
+  @id Pleroma.Web.Endpoint.url() <> "/activities/cofe"
+  @local_actor Pleroma.Web.Endpoint.url() <> "/users/cofe"
+
+  test "adds `expires_at` property" do
+    assert {:ok, %{"type" => "Create", "expires_at" => expires_at}} =
+             ActivityExpirationPolicy.filter(%{
+               "id" => @id,
+               "actor" => @local_actor,
+               "type" => "Create",
+               "object" => %{"type" => "Note"}
+             })
+
+    assert Timex.diff(expires_at, NaiveDateTime.utc_now(), :days) == 364
+  end
+
+  test "keeps existing `expires_at` if it less than the config setting" do
+    expires_at = NaiveDateTime.utc_now() |> Timex.shift(days: 1)
+
+    assert {:ok, %{"type" => "Create", "expires_at" => ^expires_at}} =
+             ActivityExpirationPolicy.filter(%{
+               "id" => @id,
+               "actor" => @local_actor,
+               "type" => "Create",
+               "expires_at" => expires_at,
+               "object" => %{"type" => "Note"}
+             })
+  end
+
+  test "overwrites existing `expires_at` if it greater than the config setting" do
+    too_distant_future = NaiveDateTime.utc_now() |> Timex.shift(years: 2)
+
+    assert {:ok, %{"type" => "Create", "expires_at" => expires_at}} =
+             ActivityExpirationPolicy.filter(%{
+               "id" => @id,
+               "actor" => @local_actor,
+               "type" => "Create",
+               "expires_at" => too_distant_future,
+               "object" => %{"type" => "Note"}
+             })
+
+    assert Timex.diff(expires_at, NaiveDateTime.utc_now(), :days) == 364
+  end
+
+  test "ignores remote activities" do
+    assert {:ok, activity} =
+             ActivityExpirationPolicy.filter(%{
+               "id" => "https://example.com/123",
+               "actor" => "https://example.com/users/cofe",
+               "type" => "Create",
+               "object" => %{"type" => "Note"}
+             })
+
+    refute Map.has_key?(activity, "expires_at")
+  end
+
+  test "ignores non-Create/Note activities" do
+    assert {:ok, activity} =
+             ActivityExpirationPolicy.filter(%{
+               "id" => "https://example.com/123",
+               "actor" => "https://example.com/users/cofe",
+               "type" => "Follow"
+             })
+
+    refute Map.has_key?(activity, "expires_at")
+
+    assert {:ok, activity} =
+             ActivityExpirationPolicy.filter(%{
+               "id" => "https://example.com/123",
+               "actor" => "https://example.com/users/cofe",
+               "type" => "Create",
+               "object" => %{"type" => "Cofe"}
+             })
+
+    refute Map.has_key?(activity, "expires_at")
+  end
+end
diff --git a/test/web/activity_pub/mrf/anti_followbot_policy_test.exs b/test/web/activity_pub/mrf/anti_followbot_policy_test.exs
index 37a7bfcf7..3c795f5ac 100644
--- a/test/web/activity_pub/mrf/anti_followbot_policy_test.exs
+++ b/test/web/activity_pub/mrf/anti_followbot_policy_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.AntiFollowbotPolicyTest do
@@ -21,7 +21,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.AntiFollowbotPolicyTest do
         "id" => "https://example.com/activities/1234"
       }
 
-      {:reject, nil} = AntiFollowbotPolicy.filter(message)
+      assert {:reject, "[AntiFollowbotPolicy]" <> _} = AntiFollowbotPolicy.filter(message)
     end
 
     test "matches followbots by display name" do
@@ -36,7 +36,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.AntiFollowbotPolicyTest do
         "id" => "https://example.com/activities/1234"
       }
 
-      {:reject, nil} = AntiFollowbotPolicy.filter(message)
+      assert {:reject, "[AntiFollowbotPolicy]" <> _} = AntiFollowbotPolicy.filter(message)
     end
   end
 
diff --git a/test/web/activity_pub/mrf/anti_link_spam_policy_test.exs b/test/web/activity_pub/mrf/anti_link_spam_policy_test.exs
index b524fdd23..6867c9853 100644
--- a/test/web/activity_pub/mrf/anti_link_spam_policy_test.exs
+++ b/test/web/activity_pub/mrf/anti_link_spam_policy_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicyTest do
@@ -33,7 +33,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicyTest do
 
   describe "with new user" do
     test "it allows posts without links" do
-      user = insert(:user)
+      user = insert(:user, local: false)
 
       assert user.note_count == 0
 
@@ -45,7 +45,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicyTest do
     end
 
     test "it disallows posts with links" do
-      user = insert(:user)
+      user = insert(:user, local: false)
 
       assert user.note_count == 0
 
@@ -55,6 +55,18 @@ defmodule Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicyTest do
 
       {:reject, _} = AntiLinkSpamPolicy.filter(message)
     end
+
+    test "it allows posts with links for local users" do
+      user = insert(:user)
+
+      assert user.note_count == 0
+
+      message =
+        @linkful_message
+        |> Map.put("actor", user.ap_id)
+
+      {:ok, _message} = AntiLinkSpamPolicy.filter(message)
+    end
   end
 
   describe "with old user" do
@@ -110,6 +122,15 @@ defmodule Pleroma.Web.ActivityPub.MRF.AntiLinkSpamPolicyTest do
   end
 
   describe "with unknown actors" do
+    setup do
+      Tesla.Mock.mock(fn
+        %{method: :get, url: "http://invalid.actor"} ->
+          %Tesla.Env{status: 500, body: ""}
+      end)
+
+      :ok
+    end
+
     test "it rejects posts without links" do
       message =
         @linkless_message
diff --git a/test/web/activity_pub/mrf/ensure_re_prepended_test.exs b/test/web/activity_pub/mrf/ensure_re_prepended_test.exs
index dbc8b9e80..9a283f27d 100644
--- a/test/web/activity_pub/mrf/ensure_re_prepended_test.exs
+++ b/test/web/activity_pub/mrf/ensure_re_prepended_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.EnsureRePrependedTest do
@@ -78,5 +78,15 @@ defmodule Pleroma.Web.ActivityPub.MRF.EnsureRePrependedTest do
       assert {:ok, res} = EnsureRePrepended.filter(message)
       assert res == message
     end
+
+    test "it skips if the object is only a reference" do
+      message = %{
+        "type" => "Create",
+        "object" => "somereference"
+      }
+
+      assert {:ok, res} = EnsureRePrepended.filter(message)
+      assert res == message
+    end
   end
 end
diff --git a/test/web/activity_pub/mrf/hellthread_policy_test.exs b/test/web/activity_pub/mrf/hellthread_policy_test.exs
index 916b95692..26f5bcdaa 100644
--- a/test/web/activity_pub/mrf/hellthread_policy_test.exs
+++ b/test/web/activity_pub/mrf/hellthread_policy_test.exs
@@ -8,6 +8,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.HellthreadPolicyTest do
 
   import Pleroma.Web.ActivityPub.MRF.HellthreadPolicy
 
+  alias Pleroma.Web.CommonAPI
+
   setup do
     user = insert(:user)
 
@@ -20,13 +22,27 @@ defmodule Pleroma.Web.ActivityPub.MRF.HellthreadPolicyTest do
         "https://instance.tld/users/user1",
         "https://instance.tld/users/user2",
         "https://instance.tld/users/user3"
-      ]
+      ],
+      "object" => %{
+        "type" => "Note"
+      }
     }
 
     [user: user, message: message]
   end
 
-  clear_config(:mrf_hellthread)
+  setup do: clear_config(:mrf_hellthread)
+
+  test "doesn't die on chat messages" do
+    Pleroma.Config.put([:mrf_hellthread], %{delist_threshold: 2, reject_threshold: 0})
+
+    user = insert(:user)
+    other_user = insert(:user)
+
+    {:ok, activity} = CommonAPI.post_chat_message(user, other_user, "moin")
+
+    assert {:ok, _} = filter(activity.data)
+  end
 
   describe "reject" do
     test "rejects the message if the recipient count is above reject_threshold", %{
@@ -34,7 +50,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.HellthreadPolicyTest do
     } do
       Pleroma.Config.put([:mrf_hellthread], %{delist_threshold: 0, reject_threshold: 2})
 
-      {:reject, nil} = filter(message)
+      assert {:reject, "[HellthreadPolicy] 3 recipients is over the limit of 2"} ==
+               filter(message)
     end
 
     test "does not reject the message if the recipient count is below reject_threshold", %{
diff --git a/test/web/activity_pub/mrf/keyword_policy_test.exs b/test/web/activity_pub/mrf/keyword_policy_test.exs
index 18242a889..b3d0f3d90 100644
--- a/test/web/activity_pub/mrf/keyword_policy_test.exs
+++ b/test/web/activity_pub/mrf/keyword_policy_test.exs
@@ -7,7 +7,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
 
   alias Pleroma.Web.ActivityPub.MRF.KeywordPolicy
 
-  clear_config(:mrf_keyword)
+  setup do: clear_config(:mrf_keyword)
 
   setup do
     Pleroma.Config.put([:mrf_keyword], %{reject: [], federated_timeline_removal: [], replace: []})
@@ -25,7 +25,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
         }
       }
 
-      assert {:reject, nil} == KeywordPolicy.filter(message)
+      assert {:reject, "[KeywordPolicy] Matches with rejected keyword"} =
+               KeywordPolicy.filter(message)
     end
 
     test "rejects if string matches in summary" do
@@ -39,7 +40,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
         }
       }
 
-      assert {:reject, nil} == KeywordPolicy.filter(message)
+      assert {:reject, "[KeywordPolicy] Matches with rejected keyword"} =
+               KeywordPolicy.filter(message)
     end
 
     test "rejects if regex matches in content" do
@@ -55,7 +57,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
                    }
                  }
 
-                 {:reject, nil} == KeywordPolicy.filter(message)
+                 {:reject, "[KeywordPolicy] Matches with rejected keyword"} ==
+                   KeywordPolicy.filter(message)
                end)
     end
 
@@ -72,7 +75,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicyTest do
                    }
                  }
 
-                 {:reject, nil} == KeywordPolicy.filter(message)
+                 {:reject, "[KeywordPolicy] Matches with rejected keyword"} ==
+                   KeywordPolicy.filter(message)
                end)
     end
   end
diff --git a/test/web/activity_pub/mrf/mention_policy_test.exs b/test/web/activity_pub/mrf/mention_policy_test.exs
index 08f7be542..220309cc9 100644
--- a/test/web/activity_pub/mrf/mention_policy_test.exs
+++ b/test/web/activity_pub/mrf/mention_policy_test.exs
@@ -7,7 +7,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.MentionPolicyTest do
 
   alias Pleroma.Web.ActivityPub.MRF.MentionPolicy
 
-  clear_config(:mrf_mention)
+  setup do: clear_config(:mrf_mention)
 
   test "pass filter if allow list is empty" do
     Pleroma.Config.delete([:mrf_mention])
@@ -76,7 +76,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.MentionPolicyTest do
         "to" => ["https://example.com/blocked"]
       }
 
-      assert MentionPolicy.filter(message) == {:reject, nil}
+      assert MentionPolicy.filter(message) ==
+               {:reject, "[MentionPolicy] Rejected for mention of https://example.com/blocked"}
     end
 
     test "cc" do
@@ -88,7 +89,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.MentionPolicyTest do
         "cc" => ["https://example.com/blocked"]
       }
 
-      assert MentionPolicy.filter(message) == {:reject, nil}
+      assert MentionPolicy.filter(message) ==
+               {:reject, "[MentionPolicy] Rejected for mention of https://example.com/blocked"}
     end
   end
 end
diff --git a/test/web/activity_pub/mrf/mrf_test.exs b/test/web/activity_pub/mrf/mrf_test.exs
index 04709df17..a63b25423 100644
--- a/test/web/activity_pub/mrf/mrf_test.exs
+++ b/test/web/activity_pub/mrf/mrf_test.exs
@@ -60,8 +60,6 @@ defmodule Pleroma.Web.ActivityPub.MRFTest do
   end
 
   describe "describe/0" do
-    clear_config([:instance, :rewrite_policy])
-
     test "it works as expected with noop policy" do
       expected = %{
         mrf_policies: ["NoOpPolicy"],
@@ -72,7 +70,7 @@ defmodule Pleroma.Web.ActivityPub.MRFTest do
     end
 
     test "it works as expected with mock policy" do
-      Pleroma.Config.put([:instance, :rewrite_policy], [MRFModuleMock])
+      clear_config([:mrf, :policies], [MRFModuleMock])
 
       expected = %{
         mrf_policies: ["MRFModuleMock"],
diff --git a/test/web/activity_pub/mrf/no_placeholder_text_policy_test.exs b/test/web/activity_pub/mrf/no_placeholder_text_policy_test.exs
index 63ed71129..64ea61dd4 100644
--- a/test/web/activity_pub/mrf/no_placeholder_text_policy_test.exs
+++ b/test/web/activity_pub/mrf/no_placeholder_text_policy_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.NoPlaceholderTextPolicyTest do
diff --git a/test/web/activity_pub/mrf/normalize_markup_test.exs b/test/web/activity_pub/mrf/normalize_markup_test.exs
index 0207be56b..9b39c45bd 100644
--- a/test/web/activity_pub/mrf/normalize_markup_test.exs
+++ b/test/web/activity_pub/mrf/normalize_markup_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.NormalizeMarkupTest do
diff --git a/test/web/activity_pub/mrf/object_age_policy_test.exs b/test/web/activity_pub/mrf/object_age_policy_test.exs
index 4815edd04..cf6acc9a2 100644
--- a/test/web/activity_pub/mrf/object_age_policy_test.exs
+++ b/test/web/activity_pub/mrf/object_age_policy_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
@@ -9,12 +9,11 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
   alias Pleroma.Web.ActivityPub.MRF.ObjectAgePolicy
   alias Pleroma.Web.ActivityPub.Visibility
 
-  clear_config([:mrf_object_age]) do
-    Config.put(:mrf_object_age,
-      threshold: 172_800,
-      actions: [:delist, :strip_followers]
-    )
-  end
+  setup do:
+          clear_config(:mrf_object_age,
+            threshold: 172_800,
+            actions: [:delist, :strip_followers]
+          )
 
   setup_all do
     Tesla.Mock.mock_global(fn env -> apply(HttpRequestMock, :request, [env]) end)
@@ -39,6 +38,17 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
   end
 
   describe "with reject action" do
+    test "works with objects with empty to or cc fields" do
+      Config.put([:mrf_object_age, :actions], [:reject])
+
+      data =
+        get_old_message()
+        |> Map.put("cc", nil)
+        |> Map.put("to", nil)
+
+      assert match?({:reject, _}, ObjectAgePolicy.filter(data))
+    end
+
     test "it rejects an old post" do
       Config.put([:mrf_object_age, :actions], [:reject])
 
@@ -57,6 +67,21 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
   end
 
   describe "with delist action" do
+    test "works with objects with empty to or cc fields" do
+      Config.put([:mrf_object_age, :actions], [:delist])
+
+      data =
+        get_old_message()
+        |> Map.put("cc", nil)
+        |> Map.put("to", nil)
+
+      {:ok, _u} = User.get_or_fetch_by_ap_id(data["actor"])
+
+      {:ok, data} = ObjectAgePolicy.filter(data)
+
+      assert Visibility.get_visibility(%{data: data}) == "unlisted"
+    end
+
     test "it delists an old post" do
       Config.put([:mrf_object_age, :actions], [:delist])
 
@@ -81,6 +106,22 @@ defmodule Pleroma.Web.ActivityPub.MRF.ObjectAgePolicyTest do
   end
 
   describe "with strip_followers action" do
+    test "works with objects with empty to or cc fields" do
+      Config.put([:mrf_object_age, :actions], [:strip_followers])
+
+      data =
+        get_old_message()
+        |> Map.put("cc", nil)
+        |> Map.put("to", nil)
+
+      {:ok, user} = User.get_or_fetch_by_ap_id(data["actor"])
+
+      {:ok, data} = ObjectAgePolicy.filter(data)
+
+      refute user.follower_address in data["to"]
+      refute user.follower_address in data["cc"]
+    end
+
     test "it strips followers collections from an old post" do
       Config.put([:mrf_object_age, :actions], [:strip_followers])
 
diff --git a/test/web/activity_pub/mrf/reject_non_public_test.exs b/test/web/activity_pub/mrf/reject_non_public_test.exs
index fc1d190bb..58b46b9a2 100644
--- a/test/web/activity_pub/mrf/reject_non_public_test.exs
+++ b/test/web/activity_pub/mrf/reject_non_public_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.RejectNonPublicTest do
@@ -8,7 +8,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.RejectNonPublicTest do
 
   alias Pleroma.Web.ActivityPub.MRF.RejectNonPublic
 
-  clear_config([:mrf_rejectnonpublic])
+  setup do: clear_config([:mrf_rejectnonpublic])
 
   describe "public message" do
     test "it's allowed when address is public" do
@@ -64,7 +64,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.RejectNonPublicTest do
       }
 
       Pleroma.Config.put([:mrf_rejectnonpublic, :allow_followersonly], false)
-      assert {:reject, nil} = RejectNonPublic.filter(message)
+      assert {:reject, _} = RejectNonPublic.filter(message)
     end
   end
 
@@ -94,7 +94,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.RejectNonPublicTest do
       }
 
       Pleroma.Config.put([:mrf_rejectnonpublic, :allow_direct], false)
-      assert {:reject, nil} = RejectNonPublic.filter(message)
+      assert {:reject, _} = RejectNonPublic.filter(message)
     end
   end
 end
diff --git a/test/web/activity_pub/mrf/simple_policy_test.exs b/test/web/activity_pub/mrf/simple_policy_test.exs
index df0f223f8..d7dde62c4 100644
--- a/test/web/activity_pub/mrf/simple_policy_test.exs
+++ b/test/web/activity_pub/mrf/simple_policy_test.exs
@@ -1,5 +1,5 @@
 # Pleroma: A lightweight social networking server
-# Copyright © 2019 Pleroma Authors <https://pleroma.social/>
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
@@ -7,19 +7,21 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
   import Pleroma.Factory
   alias Pleroma.Config
   alias Pleroma.Web.ActivityPub.MRF.SimplePolicy
-
-  clear_config([:mrf_simple]) do
-    Config.put(:mrf_simple,
-      media_removal: [],
-      media_nsfw: [],
-      federated_timeline_removal: [],
-      report_removal: [],
-      reject: [],
-      accept: [],
-      avatar_removal: [],
-      banner_removal: []
-    )
-  end
+  alias Pleroma.Web.CommonAPI
+
+  setup do:
+          clear_config(:mrf_simple,
+            media_removal: [],
+            media_nsfw: [],
+            federated_timeline_removal: [],
+            report_removal: [],
+            reject: [],
+            followers_only: [],
+            accept: [],
+            avatar_removal: [],
+            banner_removal: [],
+            reject_deletes: []
+          )
 
   describe "when :media_removal" do
     test "is empty" do
@@ -124,7 +126,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
       report_message = build_report_message()
       local_message = build_local_message()
 
-      assert SimplePolicy.filter(report_message) == {:reject, nil}
+      assert {:reject, _} = SimplePolicy.filter(report_message)
       assert SimplePolicy.filter(local_message) == {:ok, local_message}
     end
 
@@ -133,7 +135,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
       report_message = build_report_message()
       local_message = build_local_message()
 
-      assert SimplePolicy.filter(report_message) == {:reject, nil}
+      assert {:reject, _} = SimplePolicy.filter(report_message)
       assert SimplePolicy.filter(local_message) == {:ok, local_message}
     end
   end
@@ -241,7 +243,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
 
       remote_message = build_remote_message()
 
-      assert SimplePolicy.filter(remote_message) == {:reject, nil}
+      assert {:reject, _} = SimplePolicy.filter(remote_message)
     end
 
     test "activity matches with wildcard domain" do
@@ -249,7 +251,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
 
       remote_message = build_remote_message()
 
-      assert SimplePolicy.filter(remote_message) == {:reject, nil}
+      assert {:reject, _} = SimplePolicy.filter(remote_message)
     end
 
     test "actor has a matching host" do
@@ -257,7 +259,65 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
 
       remote_user = build_remote_user()
 
-      assert SimplePolicy.filter(remote_user) == {:reject, nil}
+      assert {:reject, _} = SimplePolicy.filter(remote_user)
+    end
+  end
+
+  describe "when :followers_only" do
+    test "is empty" do
+      Config.put([:mrf_simple, :followers_only], [])
+      {_, ftl_message} = build_ftl_actor_and_message()
+      local_message = build_local_message()
+
+      assert SimplePolicy.filter(ftl_message) == {:ok, ftl_message}
+      assert SimplePolicy.filter(local_message) == {:ok, local_message}
+    end
+
+    test "has a matching host" do
+      actor = insert(:user)
+      following_user = insert(:user)
+      non_following_user = insert(:user)
+
+      {:ok, _, _, _} = CommonAPI.follow(following_user, actor)
+
+      activity = %{
+        "actor" => actor.ap_id,
+        "to" => [
+          "https://www.w3.org/ns/activitystreams#Public",
+          following_user.ap_id,
+          non_following_user.ap_id
+        ],
+        "cc" => [actor.follower_address, "http://foo.bar/qux"]
+      }
+
+      dm_activity = %{
+        "actor" => actor.ap_id,
+        "to" => [
+          following_user.ap_id,
+          non_following_user.ap_id
+        ],
+        "cc" => []
+      }
+
+      actor_domain =
+        activity
+        |> Map.fetch!("actor")
+        |> URI.parse()
+        |> Map.fetch!(:host)
+
+      Config.put([:mrf_simple, :followers_only], [actor_domain])
+
+      assert {:ok, new_activity} = SimplePolicy.filter(activity)
+      assert actor.follower_address in new_activity["cc"]
+      assert following_user.ap_id in new_activity["to"]
+      refute "https://www.w3.org/ns/activitystreams#Public" in new_activity["to"]
+      refute "https://www.w3.org/ns/activitystreams#Public" in new_activity["cc"]
+      refute non_following_user.ap_id in new_activity["to"]
+      refute non_following_user.ap_id in new_activity["cc"]
+
+      assert {:ok, new_dm_activity} = SimplePolicy.filter(dm_activity)
+      assert new_dm_activity["to"] == [following_user.ap_id]
+      assert new_dm_activity["cc"] == []
     end
   end
 
@@ -279,7 +339,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
       remote_message = build_remote_message()
 
       assert SimplePolicy.filter(local_message) == {:ok, local_message}
-      assert SimplePolicy.filter(remote_message) == {:reject, nil}
+      assert {:reject, _} = SimplePolicy.filter(remote_message)
     end
 
     test "activity has a matching host" do
@@ -383,6 +443,66 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
     end
   end
 
+  describe "when :reject_deletes is empty" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], [])
+
+    test "it accepts deletions even from rejected servers" do
+      Config.put([:mrf_simple, :reject], ["remote.instance"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+
+    test "it accepts deletions even from non-whitelisted servers" do
+      Config.put([:mrf_simple, :accept], ["non.matching.remote"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+  end
+
+  describe "when :reject_deletes is not empty but it doesn't have a matching host" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], ["non.matching.remote"])
+
+    test "it accepts deletions even from rejected servers" do
+      Config.put([:mrf_simple, :reject], ["remote.instance"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+
+    test "it accepts deletions even from non-whitelisted servers" do
+      Config.put([:mrf_simple, :accept], ["non.matching.remote"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+  end
+
+  describe "when :reject_deletes has a matching host" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], ["remote.instance"])
+
+    test "it rejects the deletion" do
+      deletion_message = build_remote_deletion_message()
+
+      assert {:reject, _} = SimplePolicy.filter(deletion_message)
+    end
+  end
+
+  describe "when :reject_deletes match with wildcard domain" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], ["*.remote.instance"])
+
+    test "it rejects the deletion" do
+      deletion_message = build_remote_deletion_message()
+
+      assert {:reject, _} = SimplePolicy.filter(deletion_message)
+    end
+  end
+
   defp build_local_message do
     %{
       "actor" => "#{Pleroma.Web.base_url()}/users/alice",
@@ -409,4 +529,11 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
       "type" => "Person"
     }
   end
+
+  defp build_remote_deletion_message do
+    %{
+      "type" => "Delete",
+      "actor" => "https://remote.instance/users/bob"
+    }
+  end
 end
diff --git a/test/web/activity_pub/mrf/steal_emoji_policy_test.exs b/test/web/activity_pub/mrf/steal_emoji_policy_test.exs
new file mode 100644
index 000000000..3f8222736
--- /dev/null
+++ b/test/web/activity_pub/mrf/steal_emoji_policy_test.exs
@@ -0,0 +1,68 @@
+# 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
diff --git a/test/web/activity_pub/mrf/subchain_policy_test.exs b/test/web/activity_pub/mrf/subchain_policy_test.exs
index 221b8958e..fff66cb7e 100644
--- a/test/web/activity_pub/mrf/subchain_policy_test.exs
+++ b/test/web/activity_pub/mrf/subchain_policy_test.exs
@@ -13,8 +13,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.SubchainPolicyTest do
     "type" => "Create",
     "object" => %{"content" => "hi"}
   }
-
-  clear_config([:mrf_subchain, :match_actor])
+  setup do: clear_config([:mrf_subchain, :match_actor])
 
   test "it matches and processes subchains when the actor matches a configured target" do
     Pleroma.Config.put([:mrf_subchain, :match_actor], %{
diff --git a/test/web/activity_pub/mrf/tag_policy_test.exs b/test/web/activity_pub/mrf/tag_policy_test.exs
index e7793641a..6ff71d640 100644
--- a/test/web/activity_pub/mrf/tag_policy_test.exs
+++ b/test/web/activity_pub/mrf/tag_policy_test.exs
@@ -12,8 +12,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicyTest do
   describe "mrf_tag:disable-any-subscription" do
     test "rejects message" do
       actor = insert(:user, tags: ["mrf_tag:disable-any-subscription"])
-      message = %{"object" => actor.ap_id, "type" => "Follow"}
-      assert {:reject, nil} = TagPolicy.filter(message)
+      message = %{"object" => actor.ap_id, "type" => "Follow", "actor" => actor.ap_id}
+      assert {:reject, _} = TagPolicy.filter(message)
     end
   end
 
@@ -22,7 +22,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.TagPolicyTest do
       actor = insert(:user, tags: ["mrf_tag:disable-remote-subscription"])
       follower = insert(:user, tags: ["mrf_tag:disable-remote-subscription"], local: false)
       message = %{"object" => actor.ap_id, "type" => "Follow", "actor" => follower.ap_id}
-      assert {:reject, nil} = TagPolicy.filter(message)
+      assert {:reject, _} = TagPolicy.filter(message)
     end
 
     test "allows non-local follow requests" do
diff --git a/test/web/activity_pub/mrf/user_allowlist_policy_test.exs b/test/web/activity_pub/mrf/user_allowlist_policy_test.exs
index 7dd03870b..8e1ad5bc8 100644
--- a/test/web/activity_pub/mrf/user_allowlist_policy_test.exs
+++ b/test/web/activity_pub/mrf/user_allowlist_policy_test.exs
@@ -7,7 +7,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.UserAllowListPolicyTest do
 
   alias Pleroma.Web.ActivityPub.MRF.UserAllowListPolicy
 
-  clear_config([:mrf_user_allowlist, :localhost])
+  setup do: clear_config(:mrf_user_allowlist)
 
   test "pass filter if allow list is empty" do
     actor = insert(:user)
@@ -26,6 +26,6 @@ defmodule Pleroma.Web.ActivityPub.MRF.UserAllowListPolicyTest do
     actor = insert(:user)
     Pleroma.Config.put([:mrf_user_allowlist], %{"localhost" => ["test-ap-id"]})
     message = %{"actor" => actor.ap_id}
-    assert UserAllowListPolicy.filter(message) == {:reject, nil}
+    assert {:reject, _} = UserAllowListPolicy.filter(message)
   end
 end
diff --git a/test/web/activity_pub/mrf/vocabulary_policy_test.exs b/test/web/activity_pub/mrf/vocabulary_policy_test.exs
index d9207b095..2bceb67ee 100644
--- a/test/web/activity_pub/mrf/vocabulary_policy_test.exs
+++ b/test/web/activity_pub/mrf/vocabulary_policy_test.exs
@@ -8,7 +8,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicyTest do
   alias Pleroma.Web.ActivityPub.MRF.VocabularyPolicy
 
   describe "accept" do
-    clear_config([:mrf_vocabulary, :accept])
+    setup do: clear_config([:mrf_vocabulary, :accept])
 
     test "it accepts based on parent activity type" do
       Pleroma.Config.put([:mrf_vocabulary, :accept], ["Like"])
@@ -46,7 +46,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicyTest do
         }
       }
 
-      {:reject, nil} = VocabularyPolicy.filter(message)
+      {:reject, _} = VocabularyPolicy.filter(message)
     end
 
     test "it does not accept disallowed parent types" do
@@ -60,12 +60,12 @@ defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicyTest do
         }
       }
 
-      {:reject, nil} = VocabularyPolicy.filter(message)
+      {:reject, _} = VocabularyPolicy.filter(message)
     end
   end
 
   describe "reject" do
-    clear_config([:mrf_vocabulary, :reject])
+    setup do: clear_config([:mrf_vocabulary, :reject])
 
     test "it rejects based on parent activity type" do
       Pleroma.Config.put([:mrf_vocabulary, :reject], ["Like"])
@@ -75,7 +75,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicyTest do
         "object" => "whatever"
       }
 
-      {:reject, nil} = VocabularyPolicy.filter(message)
+      {:reject, _} = VocabularyPolicy.filter(message)
     end
 
     test "it rejects based on child object type" do
@@ -89,7 +89,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.VocabularyPolicyTest do
         }
       }
 
-      {:reject, nil} = VocabularyPolicy.filter(message)
+      {:reject, _} = VocabularyPolicy.filter(message)
     end
 
     test "it passes through objects that aren't disallowed" do