Rails & RSpec - Testing Concerns class methods

Question

I have the following (simplified) Rails Concern:

module HasTerms
  extend ActiveSupport::Concern

  module ClassMethods
    def optional_agreement
      # At         


        

Answer 1

Building on Aaron K's excellent answer here, there are some nice tricks you can use with described_class that RSpec provides to make your methods ubiquitous and make factories work for you. Here's a snippet of a shared example I recently made for an application:

shared_examples 'token authenticatable' do
  describe '.find_by_authentication_token' do
    context 'valid token' do
      it 'finds correct user' do
        class_symbol = described_class.name.underscore
        item = create(class_symbol, :authentication_token)
        create(class_symbol, :authentication_token)

        item_found = described_class.find_by_authentication_token(
          item.authentication_token
        )

        expect(item_found).to eq item
      end
    end

    context 'nil token' do
      it 'returns nil' do
        class_symbol = described_class.name.underscore
        create(class_symbol)

        item_found = described_class.find_by_authentication_token(nil)

        expect(item_found).to be_nil
      end
    end
  end
end