discourse/spec/services/experiments/toggle_spec.rb

# frozen_string_literal: true

RSpec.describe Experiments::Toggle do
  describe described_class::Contract, type: :model do
    it { is_expected.to validate_presence_of :setting_name }
  end

  describe ".call" do
    subject(:result) { described_class.call(params:, **dependencies) }

    fab!(:admin)
    let(:params) { { setting_name: } }
    let(:setting_name) { :experimental_form_templates }
    let(:dependencies) { { guardian: } }
    let(:guardian) { admin.guardian }

    context "when data is invalid" do
      let(:setting_name) { nil }

      it { is_expected.to fail_a_contract }
    end

    context "when setting_name is invalid" do
      let(:setting_name) { "wrong_value" }

      it { is_expected.to fail_a_policy(:setting_is_available) }
    end

    context "when a non-admin user tries to change a setting" do
      let(:guardian) { Guardian.new }

      it { is_expected.to fail_a_policy(:current_user_is_admin) }
    end

    context "when everything's ok" do
      it { is_expected.to run_successfully }

      context "when the setting is enabled" do
        before { SiteSetting.experimental_form_templates = true }

        it "disables the specified setting" do
          expect { result }.to change { SiteSetting.experimental_form_templates }.to(false)
        end
      end

      context "when the setting is disabled" do
        before { SiteSetting.experimental_form_templates = false }

        it "enables the specified setting" do
          expect { result }.to change { SiteSetting.experimental_form_templates }.to(true)
        end
      end

      it "creates an entry in the staff action logs" do
        expect { result }.to change {
          UserHistory.where(
            action: UserHistory.actions[:change_site_setting],
            subject: "experimental_form_templates",
          ).count
        }.by(1)
      end
    end
  end
end