spec/rubocop/cop/usage_data/instrumentation_superclass_spec.rb


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# frozen_string_literal: true

require 'fast_spec_helper'

require_relative '../../../../rubocop/cop/usage_data/instrumentation_superclass'

RSpec.describe RuboCop::Cop::UsageData::InstrumentationSuperclass do
  let(:allowed_classes) { %i[GenericMetric DatabaseMetric RedisHllMetric] }
  let(:msg) { "Instrumentation classes should subclass one of the following: #{allowed_classes.join(', ')}." }

  let(:config) do
    RuboCop::Config.new('UsageData/InstrumentationSuperclass' => {
                          'AllowedClasses' => allowed_classes
                        })
  end

  subject(:cop) { described_class.new(config) }

  context 'with class definition' do
    context 'when inheriting from allowed superclass' do
      it 'does not register an offense' do
        expect_no_offenses('class NewMetric < GenericMetric; end')
      end
    end

    context 'when inheriting from some other superclass' do
      it 'registers an offense' do
        expect_offense(<<~CODE)
          class NewMetric < BaseMetric; end
                            ^^^^^^^^^^ #{msg}
        CODE
      end
    end

    context 'when not inheriting' do
      it 'does not register an offense' do
        expect_no_offenses('class NewMetric; end')
      end
    end
  end

  context 'with dynamic class definition' do
    context 'when inheriting from allowed superclass' do
      it 'does not register an offense' do
        expect_no_offenses('NewMetric = Class.new(GenericMetric)')
      end
    end

    context 'when inheriting from some other superclass' do
      it 'registers an offense' do
        expect_offense(<<~CODE)
          NewMetric = Class.new(BaseMetric)
                                ^^^^^^^^^^ #{msg}
        CODE
      end
    end

    context 'when not inheriting' do
      it 'does not register an offense' do
        expect_no_offenses('NewMetric = Class.new')
      end
    end
  end
end