tests: configure a default currency

Author: orien

spec/double_entry/validation/line_check_spec.rb

@@ -76,7 +76,7 @@ module Validation
             its(:errors_found) { should be true }
 
             its(:log) { should include <<~LOG }
-              Error on account \#{Account account: savings scope:  currency: USD}: 100.01 (cached balance) != 100.00 (running balance)
+              Error on account \#{Account account: savings scope:  currency: }: 100.01 (cached balance) != 100.00 (running balance)
             LOG
 
             it 'should correct the account balance' do

spec/support/money.rb

@@ -1 +1,2 @@
 Money.locale_backend = :i18n
+Money.default_currency = Money::Currency.new('USD')