pleroma

activity_pub_test.exs (89072B)

# Pleroma: A lightweight social networking server
# Copyright © 2017-2022 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.Web.ActivityPub.ActivityPubTest do
  use Pleroma.DataCase
  use Oban.Testing, repo: Pleroma.Repo
  alias Pleroma.Activity
  alias Pleroma.Builders.ActivityBuilder
  alias Pleroma.Config
  alias Pleroma.Notification
  alias Pleroma.Object
  alias Pleroma.UnstubbedConfigMock, as: ConfigMock
  alias Pleroma.User
  alias Pleroma.Web.ActivityPub.ActivityPub
  alias Pleroma.Web.ActivityPub.Utils
  alias Pleroma.Web.AdminAPI.AccountView
  alias Pleroma.Web.CommonAPI
  import ExUnit.CaptureLog
  import Mock
  import Mox
  import Pleroma.Factory
  import Tesla.Mock
  setup do
    mock(fn env -> apply(HttpRequestMock, :request, [env]) end)
    ConfigMock
    |> stub_with(Pleroma.Test.StaticConfig)
    :ok
  end
  setup do: clear_config([:instance, :federating])
  describe "streaming out participations" do
    test "it streams them out" do
      user = insert(:user)
      {:ok, activity} = CommonAPI.post(user, %{status: ".", visibility: "direct"})
      {:ok, conversation} = Pleroma.Conversation.create_or_bump_for(activity)
      participations =
        conversation.participations
        |> Repo.preload(:user)
      with_mock Pleroma.Web.Streamer,
        stream: fn _, _ -> nil end do
        ActivityPub.stream_out_participations(conversation.participations)
        assert called(Pleroma.Web.Streamer.stream("participation", participations))
      end
    end
    test "streams them out on activity creation" do
      user_one = insert(:user)
      user_two = insert(:user)
      with_mock Pleroma.Web.Streamer,
        stream: fn _, _ -> nil end do
        {:ok, activity} =
          CommonAPI.post(user_one, %{
            status: "@#{user_two.nickname}",
            visibility: "direct"
          })
        conversation =
          activity.data["context"]
          |> Pleroma.Conversation.get_for_ap_id()
          |> Repo.preload(participations: :user)
        assert called(Pleroma.Web.Streamer.stream("participation", conversation.participations))
      end
    end
  end
  describe "fetching restricted by visibility" do
    test "it restricts by the appropriate visibility" do
      user = insert(:user)
      {:ok, public_activity} = CommonAPI.post(user, %{status: ".", visibility: "public"})
      {:ok, direct_activity} = CommonAPI.post(user, %{status: ".", visibility: "direct"})
      {:ok, unlisted_activity} = CommonAPI.post(user, %{status: ".", visibility: "unlisted"})
      {:ok, private_activity} = CommonAPI.post(user, %{status: ".", visibility: "private"})
      activities = ActivityPub.fetch_activities([], %{visibility: "direct", actor_id: user.ap_id})
      assert activities == [direct_activity]
      activities =
        ActivityPub.fetch_activities([], %{visibility: "unlisted", actor_id: user.ap_id})
      assert activities == [unlisted_activity]
      activities =
        ActivityPub.fetch_activities([], %{visibility: "private", actor_id: user.ap_id})
      assert activities == [private_activity]
      activities = ActivityPub.fetch_activities([], %{visibility: "public", actor_id: user.ap_id})
      assert activities == [public_activity]
      activities =
        ActivityPub.fetch_activities([], %{
          visibility: ~w[private public],
          actor_id: user.ap_id
        })
      assert activities == [public_activity, private_activity]
    end
  end
  describe "fetching excluded by visibility" do
    test "it excludes by the appropriate visibility" do
      user = insert(:user)
      {:ok, public_activity} = CommonAPI.post(user, %{status: ".", visibility: "public"})
      {:ok, direct_activity} = CommonAPI.post(user, %{status: ".", visibility: "direct"})
      {:ok, unlisted_activity} = CommonAPI.post(user, %{status: ".", visibility: "unlisted"})
      {:ok, private_activity} = CommonAPI.post(user, %{status: ".", visibility: "private"})
      activities =
        ActivityPub.fetch_activities([], %{
          exclude_visibilities: "direct",
          actor_id: user.ap_id
        })
      assert public_activity in activities
      assert unlisted_activity in activities
      assert private_activity in activities
      refute direct_activity in activities
      activities =
        ActivityPub.fetch_activities([], %{
          exclude_visibilities: "unlisted",
          actor_id: user.ap_id
        })
      assert public_activity in activities
      refute unlisted_activity in activities
      assert private_activity in activities
      assert direct_activity in activities
      activities =
        ActivityPub.fetch_activities([], %{
          exclude_visibilities: "private",
          actor_id: user.ap_id
        })
      assert public_activity in activities
      assert unlisted_activity in activities
      refute private_activity in activities
      assert direct_activity in activities
      activities =
        ActivityPub.fetch_activities([], %{
          exclude_visibilities: "public",
          actor_id: user.ap_id
        })
      refute public_activity in activities
      assert unlisted_activity in activities
      assert private_activity in activities
      assert direct_activity in activities
    end
  end
  describe "building a user from his ap id" do
    test "it returns a user" do
      user_id = "http://mastodon.example.org/users/admin"
      {:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
      assert user.ap_id == user_id
      assert user.nickname == "admin@mastodon.example.org"
      assert user.follower_address == "http://mastodon.example.org/users/admin/followers"
    end
    test "it returns a user that is invisible" do
      user_id = "http://mastodon.example.org/users/relay"
      {:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
      assert User.invisible?(user)
    end
    test "it returns a user that accepts chat messages" do
      user_id = "http://mastodon.example.org/users/admin"
      {:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
      assert user.accepts_chat_messages
    end
    test "works for guppe actors" do
      user_id = "https://gup.pe/u/bernie2020"
      Tesla.Mock.mock(fn
        %{method: :get, url: ^user_id} ->
          %Tesla.Env{
            status: 200,
            body: File.read!("test/fixtures/guppe-actor.json"),
            headers: [{"content-type", "application/activity+json"}]
          }
      end)
      {:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
      assert user.name == "Bernie2020 group"
      assert user.actor_type == "Group"
    end
    test "works for bridgy actors" do
      user_id = "https://fed.brid.gy/jk.nipponalba.scot"
      Tesla.Mock.mock(fn
        %{method: :get, url: ^user_id} ->
          %Tesla.Env{
            status: 200,
            body: File.read!("test/fixtures/bridgy/actor.json"),
            headers: [{"content-type", "application/activity+json"}]
          }
      end)
      {:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
      assert user.actor_type == "Person"
      assert user.avatar == %{
               "type" => "Image",
               "url" => [%{"href" => "https://jk.nipponalba.scot/images/profile.jpg"}],
               "name" => "profile picture"
             }
      assert user.banner == %{
               "type" => "Image",
               "url" => [%{"href" => "https://jk.nipponalba.scot/images/profile.jpg"}],
               "name" => "profile picture"
             }
    end
    test "fetches user featured collection" do
      ap_id = "https://example.com/users/lain"
      featured_url = "https://example.com/users/lain/collections/featured"
      user_data =
        "test/fixtures/users_mock/user.json"
        |> File.read!()
        |> String.replace("{{nickname}}", "lain")
        |> Jason.decode!()
        |> Map.put("featured", featured_url)
        |> Jason.encode!()
      object_id = Ecto.UUID.generate()
      featured_data =
        "test/fixtures/mastodon/collections/featured.json"
        |> File.read!()
        |> String.replace("{{domain}}", "example.com")
        |> String.replace("{{nickname}}", "lain")
        |> String.replace("{{object_id}}", object_id)
      object_url = "https://example.com/objects/#{object_id}"
      object_data =
        "test/fixtures/statuses/note.json"
        |> File.read!()
        |> String.replace("{{object_id}}", object_id)
        |> String.replace("{{nickname}}", "lain")
      Tesla.Mock.mock(fn
        %{
          method: :get,
          url: ^ap_id
        } ->
          %Tesla.Env{
            status: 200,
            body: user_data,
            headers: [{"content-type", "application/activity+json"}]
          }
        %{
          method: :get,
          url: ^featured_url
        } ->
          %Tesla.Env{
            status: 200,
            body: featured_data,
            headers: [{"content-type", "application/activity+json"}]
          }
        %{
          method: :get,
          url: ^object_url
        } ->
          %Tesla.Env{
            status: 200,
            body: object_data,
            headers: [{"content-type", "application/activity+json"}]
          }
      end)
      {:ok, user} = ActivityPub.make_user_from_ap_id(ap_id)
      assert_enqueued(
        worker: Pleroma.Workers.RemoteFetcherWorker,
        args: %{
          "op" => "fetch_remote",
          "id" => object_url,
          "depth" => 1
        }
      )
      # wait for oban
      Pleroma.Tests.ObanHelpers.perform_all()
      assert user.featured_address == featured_url
      assert Map.has_key?(user.pinned_objects, object_url)
      in_db = Pleroma.User.get_by_ap_id(ap_id)
      assert in_db.featured_address == featured_url
      assert Map.has_key?(user.pinned_objects, object_url)
      assert %{data: %{"id" => ^object_url}} = Object.get_by_ap_id(object_url)
    end
    test "fetches user featured collection without embedded object" do
      ap_id = "https://example.com/users/lain"
      featured_url = "https://example.com/users/lain/collections/featured"
      user_data =
        "test/fixtures/users_mock/user.json"
        |> File.read!()
        |> String.replace("{{nickname}}", "lain")
        |> Jason.decode!()
        |> Map.put("featured", featured_url)
        |> Jason.encode!()
      object_id = Ecto.UUID.generate()
      featured_data =
        "test/fixtures/mastodon/collections/external_featured.json"
        |> File.read!()
        |> String.replace("{{domain}}", "example.com")
        |> String.replace("{{nickname}}", "lain")
        |> String.replace("{{object_id}}", object_id)
      object_url = "https://example.com/objects/#{object_id}"
      object_data =
        "test/fixtures/statuses/note.json"
        |> File.read!()
        |> String.replace("{{object_id}}", object_id)
        |> String.replace("{{nickname}}", "lain")
      Tesla.Mock.mock(fn
        %{
          method: :get,
          url: ^ap_id
        } ->
          %Tesla.Env{
            status: 200,
            body: user_data,
            headers: [{"content-type", "application/activity+json"}]
          }
        %{
          method: :get,
          url: ^featured_url
        } ->
          %Tesla.Env{
            status: 200,
            body: featured_data,
            headers: [{"content-type", "application/activity+json"}]
          }
        %{
          method: :get,
          url: ^object_url
        } ->
          %Tesla.Env{
            status: 200,
            body: object_data,
            headers: [{"content-type", "application/activity+json"}]
          }
      end)
      {:ok, user} = ActivityPub.make_user_from_ap_id(ap_id)
      assert_enqueued(
        worker: Pleroma.Workers.RemoteFetcherWorker,
        args: %{
          "op" => "fetch_remote",
          "id" => object_url,
          "depth" => 1
        }
      )
      # wait for oban
      Pleroma.Tests.ObanHelpers.perform_all()
      assert user.featured_address == featured_url
      assert Map.has_key?(user.pinned_objects, object_url)
      in_db = Pleroma.User.get_by_ap_id(ap_id)
      assert in_db.featured_address == featured_url
      assert Map.has_key?(user.pinned_objects, object_url)
      assert %{data: %{"id" => ^object_url}} = Object.get_by_ap_id(object_url)
    end
    test "fetches user birthday information from misskey" do
      user_id = "https://misskey.io/@mkljczk"
      Tesla.Mock.mock(fn
        %{
          method: :get,
          url: ^user_id
        } ->
          %Tesla.Env{
            status: 200,
            body: File.read!("test/fixtures/birthdays/misskey-user.json"),
            headers: [{"content-type", "application/activity+json"}]
          }
      end)
      {:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
      assert user.birthday == ~D[2001-02-12]
    end
    test "fetches avatar description" do
      user_id = "https://example.com/users/marcin"
      user_data =
        "test/fixtures/users_mock/user.json"
        |> File.read!()
        |> String.replace("{{nickname}}", "marcin")
        |> Jason.decode!()
        |> Map.delete("featured")
        |> Map.update("icon", %{}, fn image -> Map.put(image, "name", "image description") end)
        |> Jason.encode!()
      Tesla.Mock.mock(fn
        %{
          method: :get,
          url: ^user_id
        } ->
          %Tesla.Env{
            status: 200,
            body: user_data,
            headers: [{"content-type", "application/activity+json"}]
          }
      end)
      {:ok, user} = ActivityPub.make_user_from_ap_id(user_id)
      assert user.avatar["name"] == "image description"
    end
  end
  test "it fetches the appropriate tag-restricted posts" do
    user = insert(:user)
    {:ok, status_one} = CommonAPI.post(user, %{status: ". #TEST"})
    {:ok, status_two} = CommonAPI.post(user, %{status: ". #essais"})
    {:ok, status_three} = CommonAPI.post(user, %{status: ". #test #Reject"})
    {:ok, status_four} = CommonAPI.post(user, %{status: ". #Any1 #any2"})
    {:ok, status_five} = CommonAPI.post(user, %{status: ". #Any2 #any1"})
    for hashtag_timeline_strategy <- [:enabled, :disabled] do
      clear_config([:features, :improved_hashtag_timeline], hashtag_timeline_strategy)
      fetch_one = ActivityPub.fetch_activities([], %{type: "Create", tag: "test"})
      fetch_two = ActivityPub.fetch_activities([], %{type: "Create", tag: ["TEST", "essais"]})
      fetch_three =
        ActivityPub.fetch_activities([], %{
          type: "Create",
          tag: ["test", "Essais"],
          tag_reject: ["reject"]
        })
      fetch_four =
        ActivityPub.fetch_activities([], %{
          type: "Create",
          tag: ["test"],
          tag_all: ["test", "REJECT"]
        })
      # Testing that deduplication (if needed) is done on DB (not Ecto) level; :limit is important
      fetch_five =
        ActivityPub.fetch_activities([], %{
          type: "Create",
          tag: ["ANY1", "any2"],
          limit: 2
        })
      fetch_six =
        ActivityPub.fetch_activities([], %{
          type: "Create",
          tag: ["any1", "Any2"],
          tag_all: [],
          tag_reject: []
        })
      # Regression test: passing empty lists as filter options shouldn't affect the results
      assert fetch_five == fetch_six
      [fetch_one, fetch_two, fetch_three, fetch_four, fetch_five] =
        Enum.map([fetch_one, fetch_two, fetch_three, fetch_four, fetch_five], fn statuses ->
          Enum.map(statuses, fn s -> Repo.preload(s, object: :hashtags) end)
        end)
      assert fetch_one == [status_one, status_three]
      assert fetch_two == [status_one, status_two, status_three]
      assert fetch_three == [status_one, status_two]
      assert fetch_four == [status_three]
      assert fetch_five == [status_four, status_five]
    end
  end
  describe "insertion" do
    test "drops activities beyond a certain limit" do
      limit = Config.get([:instance, :remote_limit])
      random_text =
        :crypto.strong_rand_bytes(limit + 1)
        |> Base.encode64()
        |> binary_part(0, limit + 1)
      data = %{
        "ok" => true,
        "object" => %{
          "content" => random_text
        }
      }
      assert {:error, :remote_limit} = ActivityPub.insert(data)
    end
    test "doesn't drop activities with content being null" do
      user = insert(:user)
      data = %{
        "actor" => user.ap_id,
        "to" => [],
        "object" => %{
          "actor" => user.ap_id,
          "to" => [],
          "type" => "Note",
          "content" => nil
        }
      }
      assert {:ok, _} = ActivityPub.insert(data)
    end
    test "returns the activity if one with the same id is already in" do
      activity = insert(:note_activity)
      {:ok, new_activity} = ActivityPub.insert(activity.data)
      assert activity.id == new_activity.id
    end
    test "inserts a given map into the activity database, giving it an id if it has none." do
      user = insert(:user)
      data = %{
        "actor" => user.ap_id,
        "to" => [],
        "object" => %{
          "actor" => user.ap_id,
          "to" => [],
          "type" => "Note",
          "content" => "hey"
        }
      }
      {:ok, %Activity{} = activity} = ActivityPub.insert(data)
      assert activity.data["ok"] == data["ok"]
      assert is_binary(activity.data["id"])
      given_id = "bla"
      data = %{
        "id" => given_id,
        "actor" => user.ap_id,
        "to" => [],
        "context" => "blabla",
        "object" => %{
          "actor" => user.ap_id,
          "to" => [],
          "type" => "Note",
          "content" => "hey"
        }
      }
      {:ok, %Activity{} = activity} = ActivityPub.insert(data)
      assert activity.data["ok"] == data["ok"]
      assert activity.data["id"] == given_id
      assert activity.data["context"] == "blabla"
    end
    test "adds a context when none is there" do
      user = insert(:user)
      data = %{
        "actor" => user.ap_id,
        "to" => [],
        "object" => %{
          "actor" => user.ap_id,
          "to" => [],
          "type" => "Note",
          "content" => "hey"
        }
      }
      {:ok, %Activity{} = activity} = ActivityPub.insert(data)
      object = Pleroma.Object.normalize(activity, fetch: false)
      assert is_binary(activity.data["context"])
      assert is_binary(object.data["context"])
    end
    test "adds an id to a given object if it lacks one and is a note and inserts it to the object database" do
      user = insert(:user)
      data = %{
        "actor" => user.ap_id,
        "to" => [],
        "object" => %{
          "actor" => user.ap_id,
          "to" => [],
          "type" => "Note",
          "content" => "hey"
        }
      }
      {:ok, %Activity{} = activity} = ActivityPub.insert(data)
      assert object = Object.normalize(activity, fetch: false)
      assert is_binary(object.data["id"])
    end
  end
  describe "listen activities" do
    test "does not increase user note count" do
      user = insert(:user)
      {:ok, activity} =
        ActivityPub.listen(%{
          to: ["https://www.w3.org/ns/activitystreams#Public"],
          actor: user,
          context: "",
          object: %{
            "actor" => user.ap_id,
            "to" => ["https://www.w3.org/ns/activitystreams#Public"],
            "artist" => "lain",
            "title" => "lain radio episode 1",
            "length" => 180_000,
            "type" => "Audio"
          }
        })
      assert activity.actor == user.ap_id
      user = User.get_cached_by_id(user.id)
      assert user.note_count == 0
    end
    test "can be fetched into a timeline" do
      _listen_activity_1 = insert(:listen)
      _listen_activity_2 = insert(:listen)
      _listen_activity_3 = insert(:listen)
      timeline = ActivityPub.fetch_activities([], %{type: ["Listen"]})
      assert length(timeline) == 3
    end
  end
  describe "create activities" do
    setup do
      [user: insert(:user)]
    end
    test "it reverts create", %{user: user} do
      with_mock(Utils, [:passthrough], maybe_federate: fn _ -> {:error, :reverted} end) do
        assert {:error, :reverted} =
                 ActivityPub.create(%{
                   to: ["user1", "user2"],
                   actor: user,
                   context: "",
                   object: %{
                     "to" => ["user1", "user2"],
                     "type" => "Note",
                     "content" => "testing"
                   }
                 })
      end
      assert Repo.aggregate(Activity, :count, :id) == 0
      assert Repo.aggregate(Object, :count, :id) == 0
    end
    test "creates activity if expiration is not configured and expires_at is not passed", %{
      user: user
    } do
      clear_config([Pleroma.Workers.PurgeExpiredActivity, :enabled], false)
      assert {:ok, _} =
               ActivityPub.create(%{
                 to: ["user1", "user2"],
                 actor: user,
                 context: "",
                 object: %{
                   "to" => ["user1", "user2"],
                   "type" => "Note",
                   "content" => "testing"
                 }
               })
    end
    test "rejects activity if expires_at present but expiration is not configured", %{user: user} do
      clear_config([Pleroma.Workers.PurgeExpiredActivity, :enabled], false)
      assert {:error, :expired_activities_disabled} =
               ActivityPub.create(%{
                 to: ["user1", "user2"],
                 actor: user,
                 context: "",
                 object: %{
                   "to" => ["user1", "user2"],
                   "type" => "Note",
                   "content" => "testing"
                 },
                 additional: %{
                   "expires_at" => DateTime.utc_now()
                 }
               })
      assert Repo.aggregate(Activity, :count, :id) == 0
      assert Repo.aggregate(Object, :count, :id) == 0
    end
    test "removes doubled 'to' recipients", %{user: user} do
      {:ok, activity} =
        ActivityPub.create(%{
          to: ["user1", "user1", "user2"],
          actor: user,
          context: "",
          object: %{
            "to" => ["user1", "user1", "user2"],
            "type" => "Note",
            "content" => "testing"
          }
        })
      assert activity.data["to"] == ["user1", "user2"]
      assert activity.actor == user.ap_id
      assert activity.recipients == ["user1", "user2", user.ap_id]
    end
    test "increases user note count only for public activities", %{user: user} do
      {:ok, _} =
        CommonAPI.post(User.get_cached_by_id(user.id), %{
          status: "1",
          visibility: "public"
        })
      {:ok, _} =
        CommonAPI.post(User.get_cached_by_id(user.id), %{
          status: "2",
          visibility: "unlisted"
        })
      {:ok, _} =
        CommonAPI.post(User.get_cached_by_id(user.id), %{
          status: "2",
          visibility: "private"
        })
      {:ok, _} =
        CommonAPI.post(User.get_cached_by_id(user.id), %{
          status: "3",
          visibility: "direct"
        })
      user = User.get_cached_by_id(user.id)
      assert user.note_count == 2
    end
    test "increases replies count", %{user: user} do
      user2 = insert(:user)
      {:ok, activity} = CommonAPI.post(user, %{status: "1", visibility: "public"})
      ap_id = activity.data["id"]
      reply_data = %{status: "1", in_reply_to_status_id: activity.id}
      # public
      {:ok, _} = CommonAPI.post(user2, Map.put(reply_data, :visibility, "public"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["repliesCount"] == 1
      # unlisted
      {:ok, _} = CommonAPI.post(user2, Map.put(reply_data, :visibility, "unlisted"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["repliesCount"] == 2
      # private
      {:ok, _} = CommonAPI.post(user2, Map.put(reply_data, :visibility, "private"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["repliesCount"] == 2
      # direct
      {:ok, _} = CommonAPI.post(user2, Map.put(reply_data, :visibility, "direct"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["repliesCount"] == 2
    end
    test "increates quotes count", %{user: user} do
      user2 = insert(:user)
      {:ok, activity} = CommonAPI.post(user, %{status: "1", visibility: "public"})
      ap_id = activity.data["id"]
      quote_data = %{status: "1", quote_id: activity.id}
      # public
      {:ok, _} = CommonAPI.post(user2, Map.put(quote_data, :visibility, "public"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["quotesCount"] == 1
      # unlisted
      {:ok, _} = CommonAPI.post(user2, Map.put(quote_data, :visibility, "unlisted"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["quotesCount"] == 2
      # private
      {:ok, _} = CommonAPI.post(user2, Map.put(quote_data, :visibility, "private"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["quotesCount"] == 2
      # direct
      {:ok, _} = CommonAPI.post(user2, Map.put(quote_data, :visibility, "direct"))
      assert %{data: _data, object: object} = Activity.get_by_ap_id_with_object(ap_id)
      assert object.data["quotesCount"] == 2
    end
  end
  describe "fetch activities for recipients" do
    test "retrieve the activities for certain recipients" do
      {:ok, activity_one} = ActivityBuilder.insert(%{"to" => ["someone"]})
      {:ok, activity_two} = ActivityBuilder.insert(%{"to" => ["someone_else"]})
      {:ok, _activity_three} = ActivityBuilder.insert(%{"to" => ["noone"]})
      activities = ActivityPub.fetch_activities(["someone", "someone_else"])
      assert length(activities) == 2
      assert activities == [activity_one, activity_two]
    end
  end
  describe "fetch activities for followed hashtags" do
    test "it should return public activities that reference a given hashtag" do
      hashtag = insert(:hashtag, name: "tenshi")
      user = insert(:user)
      other_user = insert(:user)
      {:ok, normally_visible} =
        CommonAPI.post(other_user, %{status: "hello :)", visibility: "public"})
      {:ok, public} = CommonAPI.post(user, %{status: "maji #tenshi", visibility: "public"})
      {:ok, _unrelated} = CommonAPI.post(user, %{status: "dai #tensh", visibility: "public"})
      {:ok, unlisted} = CommonAPI.post(user, %{status: "maji #tenshi", visibility: "unlisted"})
      {:ok, _private} = CommonAPI.post(user, %{status: "maji #tenshi", visibility: "private"})
      activities =
        ActivityPub.fetch_activities([other_user.follower_address], %{
          followed_hashtags: [hashtag.id]
        })
      assert length(activities) == 3
      normal_id = normally_visible.id
      public_id = public.id
      unlisted_id = unlisted.id
      assert [%{id: ^normal_id}, %{id: ^public_id}, %{id: ^unlisted_id}] = activities
    end
  end
  describe "fetch activities in context" do
    test "retrieves activities that have a given context" do
      {:ok, activity} = ActivityBuilder.insert(%{"type" => "Create", "context" => "2hu"})
      {:ok, activity_two} = ActivityBuilder.insert(%{"type" => "Create", "context" => "2hu"})
      {:ok, _activity_three} = ActivityBuilder.insert(%{"type" => "Create", "context" => "3hu"})
      {:ok, _activity_four} = ActivityBuilder.insert(%{"type" => "Announce", "context" => "2hu"})
      activity_five = insert(:note_activity)
      user = insert(:user)
      {:ok, _user_relationship} = User.block(user, %{ap_id: activity_five.data["actor"]})
      activities = ActivityPub.fetch_activities_for_context("2hu", %{blocking_user: user})
      assert activities == [activity_two, activity]
    end
    test "doesn't return activities with filtered words" do
      user = insert(:user)
      user_two = insert(:user)
      insert(:filter, user: user, phrase: "test", hide: true)
      {:ok, %{id: id1, data: %{"context" => context}}} = CommonAPI.post(user, %{status: "1"})
      {:ok, %{id: id2}} = CommonAPI.post(user_two, %{status: "2", in_reply_to_status_id: id1})
      {:ok, %{id: id3} = user_activity} =
        CommonAPI.post(user, %{status: "3 test?", in_reply_to_status_id: id2})
      {:ok, %{id: id4} = filtered_activity} =
        CommonAPI.post(user_two, %{status: "4 test!", in_reply_to_status_id: id3})
      {:ok, _} = CommonAPI.post(user, %{status: "5", in_reply_to_status_id: id4})
      activities =
        context
        |> ActivityPub.fetch_activities_for_context(%{user: user})
        |> Enum.map(& &1.id)
      assert length(activities) == 4
      assert user_activity.id in activities
      refute filtered_activity.id in activities
    end
  end
  test "doesn't return blocked activities" do
    activity_one = insert(:note_activity)
    activity_two = insert(:note_activity)
    activity_three = insert(:note_activity)
    user = insert(:user)
    booster = insert(:user)
    {:ok, _user_relationship} = User.block(user, %{ap_id: activity_one.data["actor"]})
    activities = ActivityPub.fetch_activities([], %{blocking_user: user, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    assert Enum.member?(activities, activity_three)
    refute Enum.member?(activities, activity_one)
    {:ok, _user_block} = User.unblock(user, %{ap_id: activity_one.data["actor"]})
    activities = ActivityPub.fetch_activities([], %{blocking_user: user, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    assert Enum.member?(activities, activity_three)
    assert Enum.member?(activities, activity_one)
    {:ok, _user_relationship} = User.block(user, %{ap_id: activity_three.data["actor"]})
    {:ok, %{data: %{"object" => id}}} = CommonAPI.repeat(activity_three.id, booster)
    %Activity{} = boost_activity = Activity.get_create_by_object_ap_id(id)
    activity_three = Activity.get_by_id(activity_three.id)
    activities = ActivityPub.fetch_activities([], %{blocking_user: user, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    refute Enum.member?(activities, activity_three)
    refute Enum.member?(activities, boost_activity)
    assert Enum.member?(activities, activity_one)
    activities = ActivityPub.fetch_activities([], %{blocking_user: nil, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    assert Enum.member?(activities, activity_three)
    assert Enum.member?(activities, boost_activity)
    assert Enum.member?(activities, activity_one)
  end
  test "doesn't return activities from deactivated users" do
    _user = insert(:user)
    deactivated = insert(:user)
    active = insert(:user)
    {:ok, activity_one} = CommonAPI.post(deactivated, %{status: "hey!"})
    {:ok, activity_two} = CommonAPI.post(active, %{status: "yay!"})
    {:ok, _updated_user} = User.set_activation(deactivated, false)
    activities = ActivityPub.fetch_activities([], %{})
    refute Enum.member?(activities, activity_one)
    assert Enum.member?(activities, activity_two)
  end
  test "always see your own posts even when they address people you block" do
    user = insert(:user)
    blockee = insert(:user)
    {:ok, _} = User.block(user, blockee)
    {:ok, activity} = CommonAPI.post(user, %{status: "hey! @#{blockee.nickname}"})
    activities = ActivityPub.fetch_activities([], %{blocking_user: user})
    assert Enum.member?(activities, activity)
  end
  test "doesn't return transitive interactions concerning blocked users" do
    blocker = insert(:user)
    blockee = insert(:user)
    friend = insert(:user)
    {:ok, _user_relationship} = User.block(blocker, blockee)
    {:ok, activity_one} = CommonAPI.post(friend, %{status: "hey!"})
    {:ok, activity_two} = CommonAPI.post(friend, %{status: "hey! @#{blockee.nickname}"})
    {:ok, activity_three} = CommonAPI.post(blockee, %{status: "hey! @#{friend.nickname}"})
    {:ok, activity_four} = CommonAPI.post(blockee, %{status: "hey! @#{blocker.nickname}"})
    activities = ActivityPub.fetch_activities([], %{blocking_user: blocker})
    assert Enum.member?(activities, activity_one)
    refute Enum.member?(activities, activity_two)
    refute Enum.member?(activities, activity_three)
    refute Enum.member?(activities, activity_four)
  end
  test "doesn't return announce activities with blocked users in 'to'" do
    blocker = insert(:user)
    blockee = insert(:user)
    friend = insert(:user)
    {:ok, _user_relationship} = User.block(blocker, blockee)
    {:ok, activity_one} = CommonAPI.post(friend, %{status: "hey!"})
    {:ok, activity_two} = CommonAPI.post(blockee, %{status: "hey! @#{friend.nickname}"})
    {:ok, activity_three} = CommonAPI.repeat(activity_two.id, friend)
    activities =
      ActivityPub.fetch_activities([], %{blocking_user: blocker})
      |> Enum.map(fn act -> act.id end)
    assert Enum.member?(activities, activity_one.id)
    refute Enum.member?(activities, activity_two.id)
    refute Enum.member?(activities, activity_three.id)
  end
  test "doesn't return announce activities with blocked users in 'cc'" do
    blocker = insert(:user)
    blockee = insert(:user)
    friend = insert(:user)
    {:ok, _user_relationship} = User.block(blocker, blockee)
    {:ok, activity_one} = CommonAPI.post(friend, %{status: "hey!"})
    {:ok, activity_two} = CommonAPI.post(blockee, %{status: "hey! @#{friend.nickname}"})
    assert object = Pleroma.Object.normalize(activity_two, fetch: false)
    data = %{
      "actor" => friend.ap_id,
      "object" => object.data["id"],
      "context" => object.data["context"],
      "type" => "Announce",
      "to" => ["https://www.w3.org/ns/activitystreams#Public"],
      "cc" => [blockee.ap_id]
    }
    assert {:ok, activity_three} = ActivityPub.insert(data)
    activities =
      ActivityPub.fetch_activities([], %{blocking_user: blocker})
      |> Enum.map(fn act -> act.id end)
    assert Enum.member?(activities, activity_one.id)
    refute Enum.member?(activities, activity_two.id)
    refute Enum.member?(activities, activity_three.id)
  end
  test "doesn't return activities from blocked domains" do
    domain = "dogwhistle.zone"
    domain_user = insert(:user, %{ap_id: "https://#{domain}/@pundit"})
    note = insert(:note, %{data: %{"actor" => domain_user.ap_id}})
    activity = insert(:note_activity, %{note: note})
    user = insert(:user)
    {:ok, user} = User.block_domain(user, domain)
    activities = ActivityPub.fetch_activities([], %{blocking_user: user, skip_preload: true})
    refute activity in activities
    followed_user = insert(:user)
    CommonAPI.follow(followed_user, user)
    {:ok, repeat_activity} = CommonAPI.repeat(activity.id, followed_user)
    activities = ActivityPub.fetch_activities([], %{blocking_user: user, skip_preload: true})
    refute repeat_activity in activities
  end
  test "see your own posts even when they address actors from blocked domains" do
    user = insert(:user)
    domain = "dogwhistle.zone"
    domain_user = insert(:user, %{ap_id: "https://#{domain}/@pundit"})
    {:ok, user} = User.block_domain(user, domain)
    {:ok, activity} = CommonAPI.post(user, %{status: "hey! @#{domain_user.nickname}"})
    activities = ActivityPub.fetch_activities([], %{blocking_user: user})
    assert Enum.member?(activities, activity)
  end
  test "does return activities from followed users on blocked domains" do
    domain = "meanies.social"
    domain_user = insert(:user, %{ap_id: "https://#{domain}/@pundit"})
    blocker = insert(:user)
    {:ok, blocker, domain_user} = User.follow(blocker, domain_user)
    {:ok, blocker} = User.block_domain(blocker, domain)
    assert User.following?(blocker, domain_user)
    assert User.blocks_domain?(blocker, domain_user)
    refute User.blocks?(blocker, domain_user)
    note = insert(:note, %{data: %{"actor" => domain_user.ap_id}})
    activity = insert(:note_activity, %{note: note})
    activities = ActivityPub.fetch_activities([], %{blocking_user: blocker, skip_preload: true})
    assert activity in activities
    # And check that if the guy we DO follow boosts someone else from their domain,
    # that should be hidden
    another_user = insert(:user, %{ap_id: "https://#{domain}/@meanie2"})
    bad_note = insert(:note, %{data: %{"actor" => another_user.ap_id}})
    bad_activity = insert(:note_activity, %{note: bad_note})
    {:ok, repeat_activity} = CommonAPI.repeat(bad_activity.id, domain_user)
    activities = ActivityPub.fetch_activities([], %{blocking_user: blocker, skip_preload: true})
    refute repeat_activity in activities
  end
  test "returns your own posts regardless of mute" do
    user = insert(:user)
    muted = insert(:user)
    {:ok, muted_post} = CommonAPI.post(muted, %{status: "Im stupid"})
    {:ok, reply} =
      CommonAPI.post(user, %{status: "I'm muting you", in_reply_to_status_id: muted_post.id})
    {:ok, _} = User.mute(user, muted)
    [activity] = ActivityPub.fetch_activities([], %{muting_user: user, skip_preload: true})
    assert activity.id == reply.id
  end
  test "doesn't return muted activities" do
    activity_one = insert(:note_activity)
    activity_two = insert(:note_activity)
    activity_three = insert(:note_activity)
    user = insert(:user)
    booster = insert(:user)
    activity_one_actor = User.get_by_ap_id(activity_one.data["actor"])
    {:ok, _user_relationships} = User.mute(user, activity_one_actor)
    activities = ActivityPub.fetch_activities([], %{muting_user: user, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    assert Enum.member?(activities, activity_three)
    refute Enum.member?(activities, activity_one)
    # Calling with 'with_muted' will deliver muted activities, too.
    activities =
      ActivityPub.fetch_activities([], %{
        muting_user: user,
        with_muted: true,
        skip_preload: true
      })
    assert Enum.member?(activities, activity_two)
    assert Enum.member?(activities, activity_three)
    assert Enum.member?(activities, activity_one)
    {:ok, _user_mute} = User.unmute(user, activity_one_actor)
    activities = ActivityPub.fetch_activities([], %{muting_user: user, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    assert Enum.member?(activities, activity_three)
    assert Enum.member?(activities, activity_one)
    activity_three_actor = User.get_by_ap_id(activity_three.data["actor"])
    {:ok, _user_relationships} = User.mute(user, activity_three_actor)
    {:ok, %{data: %{"object" => id}}} = CommonAPI.repeat(activity_three.id, booster)
    %Activity{} = boost_activity = Activity.get_create_by_object_ap_id(id)
    activity_three = Activity.get_by_id(activity_three.id)
    activities = ActivityPub.fetch_activities([], %{muting_user: user, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    refute Enum.member?(activities, activity_three)
    refute Enum.member?(activities, boost_activity)
    assert Enum.member?(activities, activity_one)
    activities = ActivityPub.fetch_activities([], %{muting_user: nil, skip_preload: true})
    assert Enum.member?(activities, activity_two)
    assert Enum.member?(activities, activity_three)
    assert Enum.member?(activities, boost_activity)
    assert Enum.member?(activities, activity_one)
  end
  test "doesn't return thread muted activities" do
    user = insert(:user)
    _activity_one = insert(:note_activity)
    note_two = insert(:note, data: %{"context" => "suya.."})
    activity_two = insert(:note_activity, note: note_two)
    {:ok, _activity_two} = CommonAPI.add_mute(activity_two, user)
    assert [_activity_one] = ActivityPub.fetch_activities([], %{muting_user: user})
  end
  test "returns thread muted activities when with_muted is set" do
    user = insert(:user)
    _activity_one = insert(:note_activity)
    note_two = insert(:note, data: %{"context" => "suya.."})
    activity_two = insert(:note_activity, note: note_two)
    {:ok, _activity_two} = CommonAPI.add_mute(activity_two, user)
    assert [_activity_two, _activity_one] =
             ActivityPub.fetch_activities([], %{muting_user: user, with_muted: true})
  end
  test "does include announces on request" do
    activity_three = insert(:note_activity)
    user = insert(:user)
    booster = insert(:user)
    {:ok, user, booster} = User.follow(user, booster)
    {:ok, announce} = CommonAPI.repeat(activity_three.id, booster)
    [announce_activity] = ActivityPub.fetch_activities([user.ap_id | User.following(user)])
    assert announce_activity.id == announce.id
  end
  test "excludes reblogs on request" do
    user = insert(:user)
    {:ok, expected_activity} = ActivityBuilder.insert(%{"type" => "Create"}, %{:user => user})
    {:ok, _} = ActivityBuilder.insert(%{"type" => "Announce"}, %{:user => user})
    [activity] = ActivityPub.fetch_user_activities(user, nil, %{exclude_reblogs: true})
    assert activity == expected_activity
  end
  describe "irreversible filters" do
    setup do
      user = insert(:user)
      user_two = insert(:user)
      insert(:filter, user: user_two, phrase: "cofe", hide: true)
      insert(:filter, user: user_two, phrase: "ok boomer", hide: true)
      insert(:filter, user: user_two, phrase: "test", hide: false)
      params = %{
        type: ["Create", "Announce"],
        user: user_two
      }
      {:ok, %{user: user, user_two: user_two, params: params}}
    end
    test "it returns statuses if they don't contain exact filter words", %{
      user: user,
      params: params
    } do
      {:ok, _} = CommonAPI.post(user, %{status: "hey"})
      {:ok, _} = CommonAPI.post(user, %{status: "got cofefe?"})
      {:ok, _} = CommonAPI.post(user, %{status: "I am not a boomer"})
      {:ok, _} = CommonAPI.post(user, %{status: "ok boomers"})
      {:ok, _} = CommonAPI.post(user, %{status: "ccofee is not a word"})
      {:ok, _} = CommonAPI.post(user, %{status: "this is a test"})
      activities = ActivityPub.fetch_activities([], params)
      assert Enum.count(activities) == 6
    end
    test "it does not filter user's own statuses", %{user_two: user_two, params: params} do
      {:ok, _} = CommonAPI.post(user_two, %{status: "Give me some cofe!"})
      {:ok, _} = CommonAPI.post(user_two, %{status: "ok boomer"})
      activities = ActivityPub.fetch_activities([], params)
      assert Enum.count(activities) == 2
    end
    test "it excludes statuses with filter words", %{user: user, params: params} do
      {:ok, _} = CommonAPI.post(user, %{status: "Give me some cofe!"})
      {:ok, _} = CommonAPI.post(user, %{status: "ok boomer"})
      {:ok, _} = CommonAPI.post(user, %{status: "is it a cOfE?"})
      {:ok, _} = CommonAPI.post(user, %{status: "cofe is all I need"})
      {:ok, _} = CommonAPI.post(user, %{status: "— ok BOOMER\n"})
      activities = ActivityPub.fetch_activities([], params)
      assert Enum.empty?(activities)
    end
    test "it returns all statuses if user does not have any filters" do
      another_user = insert(:user)
      {:ok, _} = CommonAPI.post(another_user, %{status: "got cofe?"})
      {:ok, _} = CommonAPI.post(another_user, %{status: "test!"})
      activities =
        ActivityPub.fetch_activities([], %{
          type: ["Create", "Announce"],
          user: another_user
        })
      assert Enum.count(activities) == 2
    end
  end
  describe "public fetch activities" do
    test "doesn't retrieve unlisted activities" do
      user = insert(:user)
      {:ok, _unlisted_activity} = CommonAPI.post(user, %{status: "yeah", visibility: "unlisted"})
      {:ok, listed_activity} = CommonAPI.post(user, %{status: "yeah"})
      [activity] = ActivityPub.fetch_public_activities()
      assert activity == listed_activity
    end
    test "retrieves public activities" do
      _activities = ActivityPub.fetch_public_activities()
      %{public: public} = ActivityBuilder.public_and_non_public()
      activities = ActivityPub.fetch_public_activities()
      assert length(activities) == 1
      assert Enum.at(activities, 0) == public
    end
    test "retrieves a maximum of 20 activities" do
      ActivityBuilder.insert_list(10)
      expected_activities = ActivityBuilder.insert_list(20)
      activities = ActivityPub.fetch_public_activities()
      assert collect_ids(activities) == collect_ids(expected_activities)
      assert length(activities) == 20
    end
    test "retrieves ids starting from a since_id" do
      activities = ActivityBuilder.insert_list(30)
      expected_activities = ActivityBuilder.insert_list(10)
      since_id = List.last(activities).id
      activities = ActivityPub.fetch_public_activities(%{since_id: since_id})
      assert collect_ids(activities) == collect_ids(expected_activities)
      assert length(activities) == 10
    end
    test "retrieves ids up to max_id" do
      ActivityBuilder.insert_list(10)
      expected_activities = ActivityBuilder.insert_list(20)
      %{id: max_id} =
        10
        |> ActivityBuilder.insert_list()
        |> List.first()
      activities = ActivityPub.fetch_public_activities(%{max_id: max_id})
      assert length(activities) == 20
      assert collect_ids(activities) == collect_ids(expected_activities)
    end
    test "paginates via offset/limit" do
      _first_part_activities = ActivityBuilder.insert_list(10)
      second_part_activities = ActivityBuilder.insert_list(10)
      later_activities = ActivityBuilder.insert_list(10)
      activities = ActivityPub.fetch_public_activities(%{page: "2", page_size: "20"}, :offset)
      assert length(activities) == 20
      assert collect_ids(activities) ==
               collect_ids(second_part_activities) ++ collect_ids(later_activities)
    end
    test "doesn't return reblogs for users for whom reblogs have been muted" do
      activity = insert(:note_activity)
      user = insert(:user)
      booster = insert(:user)
      {:ok, _reblog_mute} = CommonAPI.hide_reblogs(booster, user)
      {:ok, activity} = CommonAPI.repeat(activity.id, booster)
      activities = ActivityPub.fetch_activities([], %{muting_user: user})
      refute Enum.any?(activities, fn %{id: id} -> id == activity.id end)
    end
    test "returns reblogs for users for whom reblogs have not been muted" do
      activity = insert(:note_activity)
      user = insert(:user)
      booster = insert(:user)
      {:ok, _reblog_mute} = CommonAPI.hide_reblogs(booster, user)
      {:ok, _reblog_mute} = CommonAPI.show_reblogs(booster, user)
      {:ok, activity} = CommonAPI.repeat(activity.id, booster)
      activities = ActivityPub.fetch_activities([], %{muting_user: user})
      assert Enum.any?(activities, fn %{id: id} -> id == activity.id end)
    end
  end
  describe "uploading files" do
    setup do
      test_file = %Plug.Upload{
        content_type: "image/jpeg",
        path: Path.absname("test/fixtures/image.jpg"),
        filename: "an_image.jpg"
      }
      %{test_file: test_file}
    end
    test "strips / from filename", %{test_file: file} do
      file = %Plug.Upload{file | filename: "../../../../../nested/bad.jpg"}
      {:ok, %Object{} = object} = ActivityPub.upload(file)
      [%{"href" => href}] = object.data["url"]
      assert Regex.match?(~r"/bad.jpg$", href)
      refute Regex.match?(~r"/nested/", href)
    end
    test "sets a description if given", %{test_file: file} do
      {:ok, %Object{} = object} = ActivityPub.upload(file, description: "a cool file")
      assert object.data["name"] == "a cool file"
    end
    test "it sets the default description depending on the configuration", %{test_file: file} do
      clear_config([Pleroma.Upload, :default_description])
      clear_config([Pleroma.Upload, :default_description], nil)
      {:ok, %Object{} = object} = ActivityPub.upload(file)
      assert object.data["name"] == ""
      clear_config([Pleroma.Upload, :default_description], :filename)
      {:ok, %Object{} = object} = ActivityPub.upload(file)
      assert object.data["name"] == "an_image.jpg"
      clear_config([Pleroma.Upload, :default_description], "unnamed attachment")
      {:ok, %Object{} = object} = ActivityPub.upload(file)
      assert object.data["name"] == "unnamed attachment"
    end
    test "copies the file to the configured folder", %{test_file: file} do
      clear_config([Pleroma.Upload, :default_description], :filename)
      {:ok, %Object{} = object} = ActivityPub.upload(file)
      assert object.data["name"] == "an_image.jpg"
    end
    test "works with base64 encoded images" do
      file = %{
        img: data_uri()
      }
      {:ok, %Object{}} = ActivityPub.upload(file)
    end
  end
  describe "fetch the latest Follow" do
    test "fetches the latest Follow activity" do
      %Activity{data: %{"type" => "Follow"}} = activity = insert(:follow_activity)
      follower = Repo.get_by(User, ap_id: activity.data["actor"])
      followed = Repo.get_by(User, ap_id: activity.data["object"])
      assert activity == Utils.fetch_latest_follow(follower, followed)
    end
  end
  describe "unfollowing" do
    test "it reverts unfollow activity" do
      follower = insert(:user)
      followed = insert(:user)
      {:ok, _, _, follow_activity} = CommonAPI.follow(followed, follower)
      with_mock(Utils, [:passthrough], maybe_federate: fn _ -> {:error, :reverted} end) do
        assert {:error, :reverted} = ActivityPub.unfollow(follower, followed)
      end
      activity = Activity.get_by_id(follow_activity.id)
      assert activity.data["type"] == "Follow"
      assert activity.data["actor"] == follower.ap_id
      assert activity.data["object"] == followed.ap_id
    end
    test "creates an undo activity for the last follow" do
      follower = insert(:user)
      followed = insert(:user)
      {:ok, _, _, follow_activity} = CommonAPI.follow(followed, follower)
      {:ok, activity} = ActivityPub.unfollow(follower, followed)
      assert activity.data["type"] == "Undo"
      assert activity.data["actor"] == follower.ap_id
      embedded_object = activity.data["object"]
      assert is_map(embedded_object)
      assert embedded_object["type"] == "Follow"
      assert embedded_object["object"] == followed.ap_id
      assert embedded_object["id"] == follow_activity.data["id"]
    end
    test "creates an undo activity for a pending follow request" do
      follower = insert(:user)
      followed = insert(:user, %{is_locked: true})
      {:ok, _, _, follow_activity} = CommonAPI.follow(followed, follower)
      {:ok, activity} = ActivityPub.unfollow(follower, followed)
      assert activity.data["type"] == "Undo"
      assert activity.data["actor"] == follower.ap_id
      embedded_object = activity.data["object"]
      assert is_map(embedded_object)
      assert embedded_object["type"] == "Follow"
      assert embedded_object["object"] == followed.ap_id
      assert embedded_object["id"] == follow_activity.data["id"]
    end
  end
  describe "timeline post-processing" do
    test "it filters broken threads" do
      user1 = insert(:user)
      user2 = insert(:user)
      user3 = insert(:user)
      {:ok, user1, user3} = User.follow(user1, user3)
      assert User.following?(user1, user3)
      {:ok, user2, user3} = User.follow(user2, user3)
      assert User.following?(user2, user3)
      {:ok, user3, user2} = User.follow(user3, user2)
      assert User.following?(user3, user2)
      {:ok, public_activity} = CommonAPI.post(user3, %{status: "hi 1"})
      {:ok, private_activity_1} = CommonAPI.post(user3, %{status: "hi 2", visibility: "private"})
      {:ok, private_activity_2} =
        CommonAPI.post(user2, %{
          status: "hi 3",
          visibility: "private",
          in_reply_to_status_id: private_activity_1.id
        })
      {:ok, private_activity_3} =
        CommonAPI.post(user3, %{
          status: "hi 4",
          visibility: "private",
          in_reply_to_status_id: private_activity_2.id
        })
      activities =
        ActivityPub.fetch_activities([user1.ap_id | User.following(user1)])
        |> Enum.map(fn a -> a.id end)
      private_activity_1 = Activity.get_by_ap_id_with_object(private_activity_1.data["id"])
      assert [public_activity.id, private_activity_1.id, private_activity_3.id] == activities
      assert length(activities) == 3
      activities =
        ActivityPub.fetch_activities([user1.ap_id | User.following(user1)], %{user: user1})
        |> Enum.map(fn a -> a.id end)
      assert [public_activity.id, private_activity_1.id] == activities
      assert length(activities) == 2
    end
  end
  describe "flag/1" do
    setup do
      reporter = insert(:user)
      target_account = insert(:user)
      content = "foobar"
      {:ok, activity} = CommonAPI.post(target_account, %{status: content})
      context = Utils.generate_context_id()
      reporter_ap_id = reporter.ap_id
      target_ap_id = target_account.ap_id
      activity_ap_id = activity.data["id"]
      object_ap_id = activity.object.data["id"]
      activity_with_object = Activity.get_by_ap_id_with_object(activity_ap_id)
      {:ok,
       %{
         reporter: reporter,
         context: context,
         target_account: target_account,
         reported_activity: activity,
         content: content,
         activity_ap_id: activity_ap_id,
         object_ap_id: object_ap_id,
         activity_with_object: activity_with_object,
         reporter_ap_id: reporter_ap_id,
         target_ap_id: target_ap_id
       }}
    end
    test "it can create a Flag activity",
         %{
           reporter: reporter,
           context: context,
           target_account: target_account,
           reported_activity: reported_activity,
           content: content,
           object_ap_id: object_ap_id,
           activity_with_object: activity_with_object,
           reporter_ap_id: reporter_ap_id,
           target_ap_id: target_ap_id
         } do
      assert {:ok, activity} =
               ActivityPub.flag(%{
                 actor: reporter,
                 context: context,
                 account: target_account,
                 statuses: [reported_activity],
                 content: content
               })
      note_obj = %{
        "type" => "Note",
        "id" => object_ap_id,
        "content" => content,
        "published" => activity_with_object.object.data["published"],
        "actor" =>
          AccountView.render("show.json", %{user: target_account, skip_visibility_check: true})
      }
      assert %Activity{
               actor: ^reporter_ap_id,
               data: %{
                 "type" => "Flag",
                 "content" => ^content,
                 "context" => ^context,
                 "object" => [^target_ap_id, ^note_obj]
               }
             } = activity
    end
    test_with_mock "strips status data from Flag, before federating it",
                   %{
                     reporter: reporter,
                     context: context,
                     target_account: target_account,
                     reported_activity: reported_activity,
                     object_ap_id: object_ap_id,
                     content: content
                   },
                   Utils,
                   [:passthrough],
                   [] do
      {:ok, activity} =
        ActivityPub.flag(%{
          actor: reporter,
          context: context,
          account: target_account,
          statuses: [reported_activity],
          content: content
        })
      new_data = put_in(activity.data, ["object"], [target_account.ap_id, object_ap_id])
      assert_called(Utils.maybe_federate(%{activity | data: new_data}))
    end
    test_with_mock "reverts on error",
                   %{
                     reporter: reporter,
                     context: context,
                     target_account: target_account,
                     reported_activity: reported_activity,
                     content: content
                   },
                   Utils,
                   [:passthrough],
                   maybe_federate: fn _ -> {:error, :reverted} end do
      assert {:error, :reverted} =
               ActivityPub.flag(%{
                 actor: reporter,
                 context: context,
                 account: target_account,
                 statuses: [reported_activity],
                 content: content
               })
      assert Repo.aggregate(Activity, :count, :id) == 1
      assert Repo.aggregate(Object, :count, :id) == 1
      assert Repo.aggregate(Notification, :count, :id) == 0
    end
  end
  test "fetch_activities/2 returns activities addressed to a list " do
    user = insert(:user)
    member = insert(:user)
    {:ok, list} = Pleroma.List.create("foo", user)
    {:ok, list} = Pleroma.List.follow(list, member)
    {:ok, activity} = CommonAPI.post(user, %{status: "foobar", visibility: "list:#{list.id}"})
    activity = Repo.preload(activity, :bookmark)
    activity = %Activity{activity | thread_muted?: !!activity.thread_muted?}
    assert ActivityPub.fetch_activities([], %{user: user}) == [activity]
  end
  def data_uri do
    File.read!("test/fixtures/avatar_data_uri")
  end
  describe "fetch_activities_bounded" do
    test "fetches private posts for followed users" do
      user = insert(:user)
      {:ok, activity} =
        CommonAPI.post(user, %{
          status: "thought I looked cute might delete later :3",
          visibility: "private"
        })
      [result] = ActivityPub.fetch_activities_bounded([user.follower_address], [])
      assert result.id == activity.id
    end
    test "fetches only public posts for other users" do
      user = insert(:user)
      {:ok, activity} = CommonAPI.post(user, %{status: "#cofe", visibility: "public"})
      {:ok, _private_activity} =
        CommonAPI.post(user, %{
          status: "why is tenshi eating a corndog so cute?",
          visibility: "private"
        })
      [result] = ActivityPub.fetch_activities_bounded([], [user.follower_address])
      assert result.id == activity.id
    end
  end
  describe "fetch_follow_information_for_user" do
    test "synchronizes following/followers counters" do
      user =
        insert(:user,
          local: false,
          follower_address: "https://remote.org/users/fuser2/followers",
          following_address: "https://remote.org/users/fuser2/following"
        )
      {:ok, info} = ActivityPub.fetch_follow_information_for_user(user)
      assert info.follower_count == 527
      assert info.following_count == 267
    end
    test "detects hidden followers" do
      mock(fn env ->
        case env.url do
          "https://remote.org/users/masto_closed/followers?page=1" ->
            %Tesla.Env{status: 403, body: ""}
          _ ->
            apply(HttpRequestMock, :request, [env])
        end
      end)
      user =
        insert(:user,
          local: false,
          follower_address: "https://remote.org/users/masto_closed/followers",
          following_address: "https://remote.org/users/masto_closed/following"
        )
      {:ok, follow_info} = ActivityPub.fetch_follow_information_for_user(user)
      assert follow_info.hide_followers == true
      assert follow_info.hide_follows == false
    end
    test "detects hidden follows" do
      mock(fn env ->
        case env.url do
          "https://remote.org/users/masto_closed/following?page=1" ->
            %Tesla.Env{status: 403, body: ""}
          _ ->
            apply(HttpRequestMock, :request, [env])
        end
      end)
      user =
        insert(:user,
          local: false,
          follower_address: "https://remote.org/users/masto_closed/followers",
          following_address: "https://remote.org/users/masto_closed/following"
        )
      {:ok, follow_info} = ActivityPub.fetch_follow_information_for_user(user)
      assert follow_info.hide_followers == false
      assert follow_info.hide_follows == true
    end
    test "detects hidden follows/followers for friendica" do
      user =
        insert(:user,
          local: false,
          follower_address: "https://remote.org/followers/fuser3",
          following_address: "https://remote.org/following/fuser3"
        )
      {:ok, follow_info} = ActivityPub.fetch_follow_information_for_user(user)
      assert follow_info.hide_followers == true
      assert follow_info.follower_count == 296
      assert follow_info.following_count == 32
      assert follow_info.hide_follows == true
    end
    test "doesn't crash when follower and following counters are hidden" do
      mock(fn env ->
        case env.url do
          "https://remote.org/users/masto_hidden_counters/following" ->
            json(
              %{
                "@context" => "https://www.w3.org/ns/activitystreams",
                "id" => "https://remote.org/users/masto_hidden_counters/followers"
              },
              headers: HttpRequestMock.activitypub_object_headers()
            )
          "https://remote.org/users/masto_hidden_counters/following?page=1" ->
            %Tesla.Env{status: 403, body: ""}
          "https://remote.org/users/masto_hidden_counters/followers" ->
            json(
              %{
                "@context" => "https://www.w3.org/ns/activitystreams",
                "id" => "https://remote.org/users/masto_hidden_counters/following"
              },
              headers: HttpRequestMock.activitypub_object_headers()
            )
          "https://remote.org/users/masto_hidden_counters/followers?page=1" ->
            %Tesla.Env{status: 403, body: ""}
        end
      end)
      user =
        insert(:user,
          local: false,
          follower_address: "https://remote.org/users/masto_hidden_counters/followers",
          following_address: "https://remote.org/users/masto_hidden_counters/following"
        )
      {:ok, follow_info} = ActivityPub.fetch_follow_information_for_user(user)
      assert follow_info.hide_followers == true
      assert follow_info.follower_count == 0
      assert follow_info.hide_follows == true
      assert follow_info.following_count == 0
    end
  end
  describe "fetch_favourites/3" do
    test "returns a favourite activities sorted by adds to favorite" do
      user = insert(:user)
      other_user = insert(:user)
      user1 = insert(:user)
      user2 = insert(:user)
      {:ok, a1} = CommonAPI.post(user1, %{status: "bla"})
      {:ok, _a2} = CommonAPI.post(user2, %{status: "traps are happy"})
      {:ok, a3} = CommonAPI.post(user2, %{status: "Trees Are "})
      {:ok, a4} = CommonAPI.post(user2, %{status: "Agent Smith "})
      {:ok, a5} = CommonAPI.post(user1, %{status: "Red or Blue "})
      {:ok, _} = CommonAPI.favorite(a4.id, user)
      {:ok, _} = CommonAPI.favorite(a3.id, other_user)
      {:ok, _} = CommonAPI.favorite(a3.id, user)
      {:ok, _} = CommonAPI.favorite(a5.id, other_user)
      {:ok, _} = CommonAPI.favorite(a5.id, user)
      {:ok, _} = CommonAPI.favorite(a4.id, other_user)
      {:ok, _} = CommonAPI.favorite(a1.id, user)
      {:ok, _} = CommonAPI.favorite(a1.id, other_user)
      result = ActivityPub.fetch_favourites(user)
      assert Enum.map(result, & &1.id) == [a1.id, a5.id, a3.id, a4.id]
      result = ActivityPub.fetch_favourites(user, %{limit: 2})
      assert Enum.map(result, & &1.id) == [a1.id, a5.id]
    end
  end
  describe "Move activity" do
    test "create" do
      %{ap_id: old_ap_id} = old_user = insert(:user)
      %{ap_id: new_ap_id} = new_user = insert(:user, also_known_as: [old_ap_id])
      follower = insert(:user)
      follower_move_opted_out = insert(:user, allow_following_move: false)
      User.follow(follower, old_user)
      User.follow(follower_move_opted_out, old_user)
      assert User.following?(follower, old_user)
      assert User.following?(follower_move_opted_out, old_user)
      assert {:ok, activity} = ActivityPub.move(old_user, new_user)
      assert %Activity{
               actor: ^old_ap_id,
               data: %{
                 "actor" => ^old_ap_id,
                 "object" => ^old_ap_id,
                 "target" => ^new_ap_id,
                 "type" => "Move"
               },
               local: true,
               recipients: recipients
             } = activity
      assert old_user.follower_address in recipients
      params = %{
        "op" => "move_following",
        "origin_id" => old_user.id,
        "target_id" => new_user.id
      }
      assert_enqueued(worker: Pleroma.Workers.BackgroundWorker, args: params)
      Pleroma.Workers.BackgroundWorker.perform(%Oban.Job{args: params})
      refute User.following?(follower, old_user)
      assert User.following?(follower, new_user)
      assert User.following?(follower_move_opted_out, old_user)
      refute User.following?(follower_move_opted_out, new_user)
      activity = %Activity{activity | object: nil}
      assert [%Notification{activity: ^activity}] = Notification.for_user(follower)
      assert [%Notification{activity: ^activity}] = Notification.for_user(follower_move_opted_out)
    end
    test "old user must be in the new user's `also_known_as` list" do
      old_user = insert(:user)
      new_user = insert(:user)
      assert {:error, "Target account must have the origin in `alsoKnownAs`"} =
               ActivityPub.move(old_user, new_user)
    end
    test "do not move remote user following relationships" do
      %{ap_id: old_ap_id} = old_user = insert(:user)
      %{ap_id: new_ap_id} = new_user = insert(:user, also_known_as: [old_ap_id])
      follower_remote = insert(:user, local: false)
      User.follow(follower_remote, old_user)
      assert User.following?(follower_remote, old_user)
      assert {:ok, activity} = ActivityPub.move(old_user, new_user)
      assert %Activity{
               actor: ^old_ap_id,
               data: %{
                 "actor" => ^old_ap_id,
                 "object" => ^old_ap_id,
                 "target" => ^new_ap_id,
                 "type" => "Move"
               },
               local: true
             } = activity
      params = %{
        "op" => "move_following",
        "origin_id" => old_user.id,
        "target_id" => new_user.id
      }
      assert_enqueued(worker: Pleroma.Workers.BackgroundWorker, args: params)
      Pleroma.Workers.BackgroundWorker.perform(%Oban.Job{args: params})
      assert User.following?(follower_remote, old_user)
      refute User.following?(follower_remote, new_user)
    end
  end
  test "doesn't retrieve replies activities with exclude_replies" do
    user = insert(:user)
    {:ok, activity} = CommonAPI.post(user, %{status: "yeah"})
    {:ok, _reply} = CommonAPI.post(user, %{status: "yeah", in_reply_to_status_id: activity.id})
    [result] = ActivityPub.fetch_public_activities(%{exclude_replies: true})
    assert result.id == activity.id
    assert length(ActivityPub.fetch_public_activities()) == 2
  end
  describe "replies filtering with public messages" do
    setup :public_messages
    test "public timeline", %{users: %{u1: user}} do
      activities_ids =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:local_only, false)
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:reply_filtering_user, user)
        |> ActivityPub.fetch_public_activities()
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 16
    end
    test "public timeline with reply_visibility `following`", %{
      users: %{u1: user},
      u1: u1,
      u2: u2,
      u3: u3,
      u4: u4,
      activities: activities
    } do
      activities_ids =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:local_only, false)
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:reply_visibility, "following")
        |> Map.put(:reply_filtering_user, user)
        |> ActivityPub.fetch_public_activities()
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 14
      visible_ids =
        Map.values(u1) ++ Map.values(u2) ++ Map.values(u4) ++ Map.values(activities) ++ [u3[:r1]]
      assert Enum.all?(visible_ids, &(&1 in activities_ids))
    end
    test "public timeline with reply_visibility `self`", %{
      users: %{u1: user},
      u1: u1,
      u2: u2,
      u3: u3,
      u4: u4,
      activities: activities
    } do
      activities_ids =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:local_only, false)
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:reply_visibility, "self")
        |> Map.put(:reply_filtering_user, user)
        |> ActivityPub.fetch_public_activities()
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 10
      visible_ids = Map.values(u1) ++ [u2[:r1], u3[:r1], u4[:r1]] ++ Map.values(activities)
      assert Enum.all?(visible_ids, &(&1 in activities_ids))
    end
    test "home timeline", %{
      users: %{u1: user},
      activities: activities,
      u1: u1,
      u2: u2,
      u3: u3,
      u4: u4
    } do
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:user, user)
        |> Map.put(:reply_filtering_user, user)
      activities_ids =
        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 13
      visible_ids =
        Map.values(u1) ++
          Map.values(u3) ++
          [
            activities[:a1],
            activities[:a2],
            activities[:a4],
            u2[:r1],
            u2[:r3],
            u4[:r1],
            u4[:r2]
          ]
      assert Enum.all?(visible_ids, &(&1 in activities_ids))
    end
    test "home timeline with reply_visibility `following`", %{
      users: %{u1: user},
      activities: activities,
      u1: u1,
      u2: u2,
      u3: u3,
      u4: u4
    } do
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:user, user)
        |> Map.put(:reply_visibility, "following")
        |> Map.put(:reply_filtering_user, user)
      activities_ids =
        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 11
      visible_ids =
        Map.values(u1) ++
          [
            activities[:a1],
            activities[:a2],
            activities[:a4],
            u2[:r1],
            u2[:r3],
            u3[:r1],
            u4[:r1],
            u4[:r2]
          ]
      assert Enum.all?(visible_ids, &(&1 in activities_ids))
    end
    test "home timeline with reply_visibility `self`", %{
      users: %{u1: user},
      activities: activities,
      u1: u1,
      u2: u2,
      u3: u3,
      u4: u4
    } do
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:user, user)
        |> Map.put(:reply_visibility, "self")
        |> Map.put(:reply_filtering_user, user)
      activities_ids =
        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 9
      visible_ids =
        Map.values(u1) ++
          [
            activities[:a1],
            activities[:a2],
            activities[:a4],
            u2[:r1],
            u3[:r1],
            u4[:r1]
          ]
      assert Enum.all?(visible_ids, &(&1 in activities_ids))
    end
    test "filtering out announces where the user is the actor of the announced message" do
      user = insert(:user)
      other_user = insert(:user)
      third_user = insert(:user)
      User.follow(user, other_user)
      {:ok, post} = CommonAPI.post(user, %{status: "yo"})
      {:ok, other_post} = CommonAPI.post(third_user, %{status: "yo"})
      {:ok, _announce} = CommonAPI.repeat(post.id, other_user)
      {:ok, _announce} = CommonAPI.repeat(post.id, third_user)
      {:ok, announce} = CommonAPI.repeat(other_post.id, other_user)
      params = %{
        type: ["Announce"]
      }
      results =
        [user.ap_id | User.following(user)]
        |> ActivityPub.fetch_activities(params)
      assert length(results) == 3
      params = %{
        type: ["Announce"],
        announce_filtering_user: user
      }
      [result] =
        [user.ap_id | User.following(user)]
        |> ActivityPub.fetch_activities(params)
      assert result.id == announce.id
    end
  end
  describe "replies filtering with private messages" do
    setup :private_messages
    test "public timeline", %{users: %{u1: user}} do
      activities_ids =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:local_only, false)
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:user, user)
        |> ActivityPub.fetch_public_activities()
        |> Enum.map(& &1.id)
      assert activities_ids == []
    end
    test "public timeline with default reply_visibility `following`", %{users: %{u1: user}} do
      activities_ids =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:local_only, false)
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:reply_visibility, "following")
        |> Map.put(:reply_filtering_user, user)
        |> Map.put(:user, user)
        |> ActivityPub.fetch_public_activities()
        |> Enum.map(& &1.id)
      assert activities_ids == []
    end
    test "public timeline with default reply_visibility `self`", %{users: %{u1: user}} do
      activities_ids =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:local_only, false)
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:reply_visibility, "self")
        |> Map.put(:reply_filtering_user, user)
        |> Map.put(:user, user)
        |> ActivityPub.fetch_public_activities()
        |> Enum.map(& &1.id)
      assert activities_ids == []
      activities_ids =
        %{}
        |> Map.put(:reply_visibility, "self")
        |> Map.put(:reply_filtering_user, nil)
        |> ActivityPub.fetch_public_activities()
      assert activities_ids == []
    end
    test "home timeline", %{users: %{u1: user}} do
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:user, user)
      activities_ids =
        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 12
    end
    test "home timeline with default reply_visibility `following`", %{users: %{u1: user}} do
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:user, user)
        |> Map.put(:reply_visibility, "following")
        |> Map.put(:reply_filtering_user, user)
      activities_ids =
        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 12
    end
    test "home timeline with default reply_visibility `self`", %{
      users: %{u1: user},
      activities: activities,
      u1: u1,
      u2: u2,
      u3: u3,
      u4: u4
    } do
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:user, user)
        |> Map.put(:reply_visibility, "self")
        |> Map.put(:reply_filtering_user, user)
      activities_ids =
        ActivityPub.fetch_activities([user.ap_id | User.following(user)], params)
        |> Enum.map(& &1.id)
      assert length(activities_ids) == 10
      visible_ids =
        Map.values(u1) ++ Map.values(u4) ++ [u2[:r1], u3[:r1]] ++ Map.values(activities)
      assert Enum.all?(visible_ids, &(&1 in activities_ids))
    end
  end
  defp public_messages(_) do
    [u1, u2, u3, u4] = insert_list(4, :user)
    {:ok, u1, u2} = User.follow(u1, u2)
    {:ok, u2, u1} = User.follow(u2, u1)
    {:ok, u1, u4} = User.follow(u1, u4)
    {:ok, u4, u1} = User.follow(u4, u1)
    {:ok, u2, u3} = User.follow(u2, u3)
    {:ok, u3, u2} = User.follow(u3, u2)
    {:ok, a1} = CommonAPI.post(u1, %{status: "Status"})
    {:ok, r1_1} =
      CommonAPI.post(u2, %{
        status: "@#{u1.nickname} reply from u2 to u1",
        in_reply_to_status_id: a1.id
      })
    {:ok, r1_2} =
      CommonAPI.post(u3, %{
        status: "@#{u1.nickname} reply from u3 to u1",
        in_reply_to_status_id: a1.id
      })
    {:ok, r1_3} =
      CommonAPI.post(u4, %{
        status: "@#{u1.nickname} reply from u4 to u1",
        in_reply_to_status_id: a1.id
      })
    {:ok, a2} = CommonAPI.post(u2, %{status: "Status"})
    {:ok, r2_1} =
      CommonAPI.post(u1, %{
        status: "@#{u2.nickname} reply from u1 to u2",
        in_reply_to_status_id: a2.id
      })
    {:ok, r2_2} =
      CommonAPI.post(u3, %{
        status: "@#{u2.nickname} reply from u3 to u2",
        in_reply_to_status_id: a2.id
      })
    {:ok, r2_3} =
      CommonAPI.post(u4, %{
        status: "@#{u2.nickname} reply from u4 to u2",
        in_reply_to_status_id: a2.id
      })
    {:ok, a3} = CommonAPI.post(u3, %{status: "Status"})
    {:ok, r3_1} =
      CommonAPI.post(u1, %{
        status: "@#{u3.nickname} reply from u1 to u3",
        in_reply_to_status_id: a3.id
      })
    {:ok, r3_2} =
      CommonAPI.post(u2, %{
        status: "@#{u3.nickname} reply from u2 to u3",
        in_reply_to_status_id: a3.id
      })
    {:ok, r3_3} =
      CommonAPI.post(u4, %{
        status: "@#{u3.nickname} reply from u4 to u3",
        in_reply_to_status_id: a3.id
      })
    {:ok, a4} = CommonAPI.post(u4, %{status: "Status"})
    {:ok, r4_1} =
      CommonAPI.post(u1, %{
        status: "@#{u4.nickname} reply from u1 to u4",
        in_reply_to_status_id: a4.id
      })
    {:ok, r4_2} =
      CommonAPI.post(u2, %{
        status: "@#{u4.nickname} reply from u2 to u4",
        in_reply_to_status_id: a4.id
      })
    {:ok, r4_3} =
      CommonAPI.post(u3, %{
        status: "@#{u4.nickname} reply from u3 to u4",
        in_reply_to_status_id: a4.id
      })
    {:ok,
     users: %{u1: u1, u2: u2, u3: u3, u4: u4},
     activities: %{a1: a1.id, a2: a2.id, a3: a3.id, a4: a4.id},
     u1: %{r1: r1_1.id, r2: r1_2.id, r3: r1_3.id},
     u2: %{r1: r2_1.id, r2: r2_2.id, r3: r2_3.id},
     u3: %{r1: r3_1.id, r2: r3_2.id, r3: r3_3.id},
     u4: %{r1: r4_1.id, r2: r4_2.id, r3: r4_3.id}}
  end
  defp private_messages(_) do
    [u1, u2, u3, u4] = insert_list(4, :user)
    {:ok, u1, u2} = User.follow(u1, u2)
    {:ok, u2, u1} = User.follow(u2, u1)
    {:ok, u1, u3} = User.follow(u1, u3)
    {:ok, u3, u1} = User.follow(u3, u1)
    {:ok, u1, u4} = User.follow(u1, u4)
    {:ok, u4, u1} = User.follow(u4, u1)
    {:ok, u2, u3} = User.follow(u2, u3)
    {:ok, u3, u2} = User.follow(u3, u2)
    {:ok, a1} = CommonAPI.post(u1, %{status: "Status", visibility: "private"})
    {:ok, r1_1} =
      CommonAPI.post(u2, %{
        status: "@#{u1.nickname} reply from u2 to u1",
        in_reply_to_status_id: a1.id,
        visibility: "private"
      })
    {:ok, r1_2} =
      CommonAPI.post(u3, %{
        status: "@#{u1.nickname} reply from u3 to u1",
        in_reply_to_status_id: a1.id,
        visibility: "private"
      })
    {:ok, r1_3} =
      CommonAPI.post(u4, %{
        status: "@#{u1.nickname} reply from u4 to u1",
        in_reply_to_status_id: a1.id,
        visibility: "private"
      })
    {:ok, a2} = CommonAPI.post(u2, %{status: "Status", visibility: "private"})
    {:ok, r2_1} =
      CommonAPI.post(u1, %{
        status: "@#{u2.nickname} reply from u1 to u2",
        in_reply_to_status_id: a2.id,
        visibility: "private"
      })
    {:ok, r2_2} =
      CommonAPI.post(u3, %{
        status: "@#{u2.nickname} reply from u3 to u2",
        in_reply_to_status_id: a2.id,
        visibility: "private"
      })
    {:ok, a3} = CommonAPI.post(u3, %{status: "Status", visibility: "private"})
    {:ok, r3_1} =
      CommonAPI.post(u1, %{
        status: "@#{u3.nickname} reply from u1 to u3",
        in_reply_to_status_id: a3.id,
        visibility: "private"
      })
    {:ok, r3_2} =
      CommonAPI.post(u2, %{
        status: "@#{u3.nickname} reply from u2 to u3",
        in_reply_to_status_id: a3.id,
        visibility: "private"
      })
    {:ok, a4} = CommonAPI.post(u4, %{status: "Status", visibility: "private"})
    {:ok, r4_1} =
      CommonAPI.post(u1, %{
        status: "@#{u4.nickname} reply from u1 to u4",
        in_reply_to_status_id: a4.id,
        visibility: "private"
      })
    {:ok,
     users: %{u1: u1, u2: u2, u3: u3, u4: u4},
     activities: %{a1: a1.id, a2: a2.id, a3: a3.id, a4: a4.id},
     u1: %{r1: r1_1.id, r2: r1_2.id, r3: r1_3.id},
     u2: %{r1: r2_1.id, r2: r2_2.id},
     u3: %{r1: r3_1.id, r2: r3_2.id},
     u4: %{r1: r4_1.id}}
  end
  describe "maybe_update_follow_information/1" do
    setup do
      clear_config([:instance, :external_user_synchronization], true)
      user = %{
        local: false,
        ap_id: "https://gensokyo.2hu/users/raymoo",
        following_address: "https://gensokyo.2hu/users/following",
        follower_address: "https://gensokyo.2hu/users/followers",
        type: "Person"
      }
      %{user: user}
    end
    test "logs an error when it can't fetch the info", %{user: user} do
      assert capture_log(fn ->
               ActivityPub.maybe_update_follow_information(user)
             end) =~ "Follower/Following counter update for #{user.ap_id} failed"
    end
    test "just returns the input if the user type is Application", %{
      user: user
    } do
      user =
        user
        |> Map.put(:type, "Application")
      refute capture_log(fn ->
               assert ^user = ActivityPub.maybe_update_follow_information(user)
             end) =~ "Follower/Following counter update for #{user.ap_id} failed"
    end
    test "it just returns the input if the user has no following/follower addresses", %{
      user: user
    } do
      user =
        user
        |> Map.put(:following_address, nil)
        |> Map.put(:follower_address, nil)
      refute capture_log(fn ->
               assert ^user = ActivityPub.maybe_update_follow_information(user)
             end) =~ "Follower/Following counter update for #{user.ap_id} failed"
    end
  end
  describe "global activity expiration" do
    test "creates an activity expiration for local Create activities" do
      clear_config([:mrf, :policies], Pleroma.Web.ActivityPub.MRF.ActivityExpirationPolicy)
      {:ok, activity} = ActivityBuilder.insert(%{"type" => "Create", "context" => "3hu"})
      {:ok, follow} = ActivityBuilder.insert(%{"type" => "Follow", "context" => "3hu"})
      assert_enqueued(
        worker: Pleroma.Workers.PurgeExpiredActivity,
        args: %{activity_id: activity.id},
        scheduled_at:
          activity.inserted_at
          |> DateTime.from_naive!("Etc/UTC")
          |> Timex.shift(days: 365)
      )
      refute_enqueued(
        worker: Pleroma.Workers.PurgeExpiredActivity,
        args: %{activity_id: follow.id}
      )
    end
  end
  describe "handling of clashing nicknames" do
    test "renames an existing user with a clashing nickname and a different ap id" do
      orig_user =
        insert(
          :user,
          local: false,
          nickname: "admin@mastodon.example.org",
          ap_id: "http://mastodon.example.org/users/harinezumigari"
        )
      %{
        nickname: orig_user.nickname,
        ap_id: orig_user.ap_id <> "part_2"
      }
      |> ActivityPub.maybe_handle_clashing_nickname()
      user = User.get_by_id(orig_user.id)
      assert user.nickname == "#{orig_user.id}.admin@mastodon.example.org"
    end
    test "does nothing with a clashing nickname and the same ap id" do
      orig_user =
        insert(
          :user,
          local: false,
          nickname: "admin@mastodon.example.org",
          ap_id: "http://mastodon.example.org/users/harinezumigari"
        )
      %{
        nickname: orig_user.nickname,
        ap_id: orig_user.ap_id
      }
      |> ActivityPub.maybe_handle_clashing_nickname()
      user = User.get_by_id(orig_user.id)
      assert user.nickname == orig_user.nickname
    end
  end
  describe "reply filtering" do
    test "`following` still contains announcements by friends" do
      user = insert(:user)
      followed = insert(:user)
      not_followed = insert(:user)
      User.follow(user, followed)
      {:ok, followed_post} = CommonAPI.post(followed, %{status: "Hello"})
      {:ok, not_followed_to_followed} =
        CommonAPI.post(not_followed, %{
          status: "Also hello",
          in_reply_to_status_id: followed_post.id
        })
      {:ok, retoot} = CommonAPI.repeat(not_followed_to_followed.id, followed)
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:reply_filtering_user, user)
        |> Map.put(:reply_visibility, "following")
        |> Map.put(:announce_filtering_user, user)
        |> Map.put(:user, user)
      activities =
        [user.ap_id | User.following(user)]
        |> ActivityPub.fetch_activities(params)
      followed_post_id = followed_post.id
      retoot_id = retoot.id
      assert [%{id: ^followed_post_id}, %{id: ^retoot_id}] = activities
      assert length(activities) == 2
    end
    # This test is skipped because, while this is the desired behavior,
    # there seems to be no good way to achieve it with the method that
    # we currently use for detecting to who a reply is directed.
    # This is a TODO and should be fixed by a later rewrite of the code
    # in question.
    @tag skip: true
    test "`following` still contains self-replies by friends" do
      user = insert(:user)
      followed = insert(:user)
      not_followed = insert(:user)
      User.follow(user, followed)
      {:ok, followed_post} = CommonAPI.post(followed, %{status: "Hello"})
      {:ok, not_followed_post} = CommonAPI.post(not_followed, %{status: "Also hello"})
      {:ok, _followed_to_not_followed} =
        CommonAPI.post(followed, %{status: "sup", in_reply_to_status_id: not_followed_post.id})
      {:ok, _followed_self_reply} =
        CommonAPI.post(followed, %{status: "Also cofe", in_reply_to_status_id: followed_post.id})
      params =
        %{}
        |> Map.put(:type, ["Create", "Announce"])
        |> Map.put(:blocking_user, user)
        |> Map.put(:muting_user, user)
        |> Map.put(:reply_filtering_user, user)
        |> Map.put(:reply_visibility, "following")
        |> Map.put(:announce_filtering_user, user)
        |> Map.put(:user, user)
      activities =
        [user.ap_id | User.following(user)]
        |> ActivityPub.fetch_activities(params)
      assert length(activities) == 2
    end
  end
  test "allow fetching of accounts with an empty string name field" do
    Tesla.Mock.mock(fn
      %{method: :get, url: "https://princess.cat/users/mewmew"} ->
        file = File.read!("test/fixtures/mewmew_no_name.json")
        %Tesla.Env{status: 200, body: file, headers: HttpRequestMock.activitypub_object_headers()}
    end)
    {:ok, user} = ActivityPub.make_user_from_ap_id("https://princess.cat/users/mewmew")
    assert user.name == " "
  end
  test "pin_data_from_featured_collection will ignore unsupported values" do
    assert %{} ==
             ActivityPub.pin_data_from_featured_collection(%{
               "type" => "OrderedCollection",
               "first" => "https://social.example/users/alice/collections/featured?page=true"
             })
  end
end