discourse/spec/lib/post_action_destroyer_spec.rb

# frozen_string_literal: true

RSpec.describe PostActionDestroyer do
  fab!(:admin) { Fabricate(:admin) }
  fab!(:user) { Fabricate(:user) }
  fab!(:post) { Fabricate(:post) }

  describe "#perform" do
    context "with like" do
      context "when post action exists" do
        before { PostActionCreator.new(user, post, PostActionType.types[:like]).perform }

        it "destroys the post action" do
          expect { PostActionDestroyer.destroy(user, post, :like) }.to change {
            PostAction.count
          }.by(-1)
        end

        it "notifies subscribers" do
          expect(post.reload.like_count).to eq(1)

          messages = MessageBus.track_publish { PostActionDestroyer.destroy(user, post, :like) }

          message = messages.find { |msg| msg.data[:type] === :unliked }.data
          expect(message).to be_present
          expect(message[:type]).to eq(:unliked)
          expect(message[:likes_count]).to eq(0)
          expect(message[:user_id]).to eq(user.id)
        end

        it "notifies updated topic stats to subscribers" do
          topic = Fabricate(:topic)
          post = Fabricate(:post, topic: topic)
          PostActionCreator.new(user, post, PostActionType.types[:like]).perform

          expect(post.reload.like_count).to eq(1)

          messages =
            MessageBus.track_publish("/topic/#{topic.id}") do
              PostActionDestroyer.destroy(user, post, :like)
            end

          stats_message = messages.select { |msg| msg.data[:type] == :stats }.first
          expect(stats_message).to be_present
          expect(stats_message.data[:like_count]).to eq(0)
        end

        it "triggers the right flag events" do
          PostActionCreator.new(user, post, PostActionType.types[:inappropriate]).perform
          events =
            DiscourseEvent.track_events { PostActionDestroyer.destroy(user, post, :inappropriate) }
          event_names = events.map { |event| event[:event_name] }
          expect(event_names).to include(:flag_destroyed)
          expect(event_names).not_to include(:like_destroyed)
        end

        it "triggers the right like events" do
          events = DiscourseEvent.track_events { PostActionDestroyer.destroy(user, post, :like) }
          event_names = events.map { |event| event[:event_name] }
          expect(event_names).to include(:like_destroyed)
          expect(event_names).not_to include(:flag_destroyed)
        end

        it "sends the right event arguments" do
          events = DiscourseEvent.track_events { PostActionDestroyer.destroy(user, post, :like) }
          event = events.find { |e| e[:event_name] == :like_destroyed }
          expect(event.present?).to eq(true)
          expect(event[:params].first).to be_instance_of(PostAction)
          expect(event[:params].second).to be_instance_of(PostActionDestroyer)
        end
      end

      context "when post action doesn’t exist" do
        it "fails" do
          result = PostActionDestroyer.destroy(user, post, :like)
          expect(result.success).to eq(false)
          expect(result.not_found).to eq(true)
        end
      end
    end

    context "with any other notifiable type" do
      before { PostActionCreator.new(user, post, PostActionType.types[:spam]).perform }

      it "destroys the post action" do
        expect { PostActionDestroyer.destroy(user, post, :spam) }.to change { PostAction.count }.by(
          -1,
        )
      end

      it "notifies subscribers" do
        messages = MessageBus.track_publish { PostActionDestroyer.destroy(user, post, :spam) }

        expect(messages.last.data[:type]).to eq(:acted)
      end
    end
  end
end