Effective Testing with RSpec 3

Defining the Ledger

We’ll start with an empty Ledger class. In your project directory, create a new file called app/ledger.rb with the following contents:

05-unit-specs/08/expense_tracker/app/ledger.rb

module ExpenseTracker
  RecordResult = Struct.new(:success?, :expense_id, :error_message)

  class Ledger
  end
end

Notice we’ve also moved the temporary RecordResult struct definition from earlier into its permanent home here. Don’t forget to delete the old version of RecordResult from spec/unit/app/api_spec.rb.

You’ll need to require this new file from app/api.rb:

05-unit-specs/08/expense_tracker/app/api.rb

require_relative 'ledger'

The specs you have so far are still using the fake ledger. They passed without a real Ledger ...