docbrown/spec/models/user_subscription_spec.rb

require "rails_helper"

RSpec.describe UserSubscription, type: :model do
  subject { build(:user_subscription) }

  let(:subscriber) { create(:user) }
  let(:source) { create(:article, :with_user_subscription_tag_role_user, with_user_subscription_tag: true) }

  describe "validations" do
    it { is_expected.to validate_presence_of(:user_subscription_sourceable_type) }
    it { is_expected.to validate_presence_of(:subscriber_email) }
    it { is_expected.to validate_inclusion_of(:user_subscription_sourceable_type).in_array(%w[Article]) }

    # rubocop:disable RSpec/NamedSubject
    it {
      expect(subject).to validate_uniqueness_of(:subscriber_id)
        .scoped_to(%i[subscriber_email user_subscription_sourceable_type user_subscription_sourceable_id])
    }
    # rubocop:enable RSpec/NamedSubject

    it "validates the source is active" do
      unpublished_source = create(:article, :with_user_subscription_tag_role_user, with_user_subscription_tag: true,
                                                                                   published: false)
      user_subscription = described_class.build(source: unpublished_source, subscriber: subscriber)
      expect(user_subscription).not_to be_valid
      expect(user_subscription.errors[:base]).to include "Source not found. Please make sure your Article is active!"
    end

    it "validates the tag is enabled in the source" do
      source_without_tag = create(:article, :with_user_subscription_tag_role_user)
      user_subscription = described_class.build(source: source_without_tag, subscriber: subscriber)
      expect(user_subscription).not_to be_valid
      expect(user_subscription.errors[:base]).to include "User subscriptions are not enabled for the source."
    end

    it "validates the subscriber isn't using an Apple private relay" do
      subscriber_with_apple_relay = create(:user, email: "test@privaterelay.appleid.com")
      user_subscription = described_class.build(source: source, subscriber: subscriber_with_apple_relay)
      expect(user_subscription).not_to be_valid

      error = "Can't subscribe with an Apple private relay. Please update email."
      expect(user_subscription.errors[:subscriber_email]).to include(error)
    end

    describe "#user_subscription_sourceable" do
      it "is required on creation" do
        subscription = described_class.new(
          user_subscription_sourceable: nil, subscriber: subscriber, subscriber_email: subscriber.email,
          author: source.user
        )
        subscription.save

        expect(subscription).not_to be_valid
        expect(subscription.errors.messages.keys).to include(
          :user_subscription_sourceable_id, :user_subscription_sourceable_type
        )
      end

      it "can be nulled on update" do
        subscription = described_class.make(source: source, subscriber: subscriber)
        subscription.update(user_subscription_sourceable: nil)

        expect(subscription).to be_valid
      end
    end
  end

  describe "#build" do
    it "returns a new UserSubscription with the correct attributes" do
      new_user_subscription = described_class.new(
        user_subscription_sourceable: source,
        author_id: source.user_id,
        subscriber_id: subscriber.id,
        subscriber_email: subscriber.email,
      )

      factory_user_subscription = described_class.build(source: source, subscriber: subscriber)

      factory_user_subscription.attributes.each do |name, val|
        expect(new_user_subscription[name]).to eq val
      end
    end
  end

  describe "#make" do
    it "returns a created UserSubscription with the correct attributes" do
      factory_user_subscription = described_class.make(source: source, subscriber: subscriber)

      expect(factory_user_subscription.user_subscription_sourceable).to eq source
      expect(factory_user_subscription.author_id).to eq source.user_id
      expect(factory_user_subscription.subscriber_id).to eq subscriber.id
      expect(factory_user_subscription.subscriber_email).to eq subscriber.email
    end
  end

  describe "counter_culture" do
    let(:user) { create(:user) }

    context "when a UserSubscription is created" do
      it "increments subscribed_to_user_subscriptions_count on user" do
        expect do
          create(:user_subscription, subscriber: user)
        end.to change { user.reload.subscribed_to_user_subscriptions_count }.by(1)
      end
    end

    context "when a UserSubscription is destroyed" do
      it "decrements subscribed_to_user_subscriptions_count on user" do
        user_subscription = create(:user_subscription, subscriber: user)
        expect do
          user_subscription.destroy
        end.to change { user.reload.subscribed_to_user_subscriptions_count }.by(-1)
      end
    end
  end
end