Merge branch 'deletion-resilience' into 'develop'

Deletion resilience

See merge request pleroma/pleroma!3237

test/pleroma/resilience_test.exs

@@ -0,0 +1,103 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.ResilienceTest do
+  use Pleroma.Web.ConnCase, async: true
+
+  import Pleroma.Factory
+
+  alias Pleroma.Activity
+  alias Pleroma.Repo
+  alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.MastodonAPI.StatusView
+
+  setup do
+    # user = insert(:user)
+    %{user: user, conn: conn} = oauth_access(["write", "read"])
+    other_user = insert(:user)
+
+    {:ok, post_one} = CommonAPI.post(user, %{status: "Here is a post"})
+    {:ok, like} = CommonAPI.favorite(other_user, post_one.id)
+
+    %{
+      user: user,
+      other_user: other_user,
+      post_one: post_one,
+      like: like,
+      conn: conn
+    }
+  end
+
+  test "after destruction of like activities, things still work", %{
+    user: user,
+    post_one: post,
+    other_user: other_user,
+    conn: conn,
+    like: like
+  } do
+    post = Repo.get(Activity, post.id)
+
+    # Rendering the liked status
+    rendered_for_user = StatusView.render("show.json", %{activity: post, for: user})
+    assert rendered_for_user.favourites_count == 1
+
+    rendered_for_other_user = StatusView.render("show.json", %{activity: post, for: other_user})
+    assert rendered_for_other_user.favourites_count == 1
+    assert rendered_for_other_user.favourited
+
+    # Getting the favourited by
+    [liking_user] =
+      conn
+      |> get("/api/v1/statuses/#{post.id}/favourited_by")
+      |> json_response(200)
+
+    assert liking_user["id"] == other_user.id
+
+    # We have one notification
+    [notification] =
+      conn
+      |> get("/api/v1/notifications")
+      |> json_response(200)
+
+    assert notification["type"] == "favourite"
+
+    # Destroying the like
+    Repo.delete(like)
+    post = Repo.get(Activity, post.id)
+
+    # Rendering the liked status
+    rendered_for_user = StatusView.render("show.json", %{activity: post, for: user})
+    assert rendered_for_user.favourites_count == 1
+
+    rendered_for_other_user = StatusView.render("show.json", %{activity: post, for: other_user})
+    assert rendered_for_other_user.favourites_count == 1
+    assert rendered_for_other_user.favourited
+
+    # Getting the favourited by
+    [liking_user] =
+      conn
+      |> get("/api/v1/statuses/#{post.id}/favourited_by")
+      |> json_response(200)
+
+    assert liking_user["id"] == other_user.id
+
+    # Notification is removed
+
+    assert [] ==
+             conn
+             |> get("/api/v1/notifications")
+             |> json_response(200)
+
+    # Favoriting again doesn't hurt
+    {:ok, _like_two} = CommonAPI.favorite(other_user, post.id)
+
+    post = Repo.get(Activity, post.id)
+
+    # Rendering the liked status
+    rendered_for_user = StatusView.render("show.json", %{activity: post, for: user})
+    assert rendered_for_user.favourites_count == 1
+
+    # General fallout: Can't unfavorite stuff anymore. Acceptable for remote users.
+  end
+end