discourse/spec/models/category_featured_topic_spec.rb

# frozen_string_literal: true

RSpec.describe CategoryFeaturedTopic do
  it { is_expected.to belong_to :category }
  it { is_expected.to belong_to :topic }

  describe ".feature_topics_for" do
    fab!(:user) { Fabricate(:user) }
    fab!(:category) { Fabricate(:category) }
    let!(:category_post) do
      PostCreator.create(
        user,
        raw: "I put this post in the category",
        title: "categorize THIS",
        category: category.id,
      )
    end

    it "works in batched mode" do
      category2 = Fabricate(:category)
      post2 = create_post(category: category2.id)

      CategoryFeaturedTopic.destroy_all
      CategoryFeaturedTopic.clear_batch!

      size = Category.order(:id).where("id < ?", category.id).count + 1

      CategoryFeaturedTopic.feature_topics(batched: true, batch_size: size)

      expect(CategoryFeaturedTopic.where(topic_id: category_post.topic_id).count).to eq(1)
      expect(CategoryFeaturedTopic.where(topic_id: post2.topic_id).count).to eq(0)

      CategoryFeaturedTopic.feature_topics(batched: true, batch_size: size)

      expect(CategoryFeaturedTopic.where(topic_id: post2.topic_id).count).to eq(1)
    end

    it "should feature topics for a secure category" do
      # so much dancing, I am thinking fixures make sense here.
      user.change_trust_level!(TrustLevel[1])

      category.set_permissions(trust_level_1: :full)
      category.save

      _uncategorized_post =
        PostCreator.create(user, raw: "this is my new post 123 post", title: "hello world")

      CategoryFeaturedTopic.feature_topics_for(category)
      expect(CategoryFeaturedTopic.count).to be(1)
    end

    it "should not include invisible topics" do
      invisible_post =
        PostCreator.create(
          user,
          raw: "Don't look at this post because it's awful.",
          title: "not visible to anyone",
          category: category.id,
        )
      invisible_post.topic.update_status("visible", false, Fabricate(:admin))
      CategoryFeaturedTopic.feature_topics_for(category)
      expect(CategoryFeaturedTopic.count).to be(1)
    end

    it "should feature stuff in the correct order" do
      category = Fabricate(:category, num_featured_topics: 2)
      _t5 = Fabricate(:topic, category_id: category.id, bumped_at: 12.minutes.ago)
      t4 = Fabricate(:topic, category_id: category.id, bumped_at: 10.minutes.ago)
      t3 = Fabricate(:topic, category_id: category.id, bumped_at: 7.minutes.ago)
      t2 = Fabricate(:topic, category_id: category.id, bumped_at: 4.minutes.ago)
      t1 = Fabricate(:topic, category_id: category.id, bumped_at: 5.minutes.ago)
      pinned =
        Fabricate(
          :topic,
          category_id: category.id,
          pinned_at: 10.minutes.ago,
          bumped_at: 10.minutes.ago,
        )

      CategoryFeaturedTopic.feature_topics_for(category)

      # Should find more than we need: pinned topics first, then num_featured_topics * 2
      expect(
        CategoryFeaturedTopic.where(category_id: category.id).order("rank asc").pluck(:topic_id),
      ).to eq([pinned.id, t2.id, t1.id, t3.id, t4.id])
    end
  end
end