tests.rb

class Account < ActiveRecord::Base
  belongs_to :user
  has_many   :bills
  has_many   :expenses

  validates_presence_of     :name, :message => "You didn't provide account name"
  validates_length_of       :name, :minimum => 4,
                            :message => "Account name must be 4 characters minimum",
                            :on => :create

  validates_numericality_of :balance, :message => "Only numbers allowed for balance",
                            :if => :"balance", :on => :create

end

#shoulda account test
require 'test_helper'

class AccountTest < ActiveSupport::TestCase

  should_belong_to              :user
  should_ensure_length_at_least :name, 4
  should_have_many              :bills, :expenses
  should_validate_numericality_of  :balance
end


# errors

1) Failure:
test: Account should ensure name has a length of at least 4. (AccountTest)
[/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/assertions.rb:50:in `assert_accepts'
/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/active_record/macros.rb:254:in `__bind_1238772668_116192'
/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/context.rb:253:in `call'
/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/context.rb:253:in `test: Account should ensure name has a length of at least 4. ']:
errors to include "is too short (minimum is 4 characters)" when name is set to "xxx", got errors: name Account name must be 4 characters minimum ("xxx")

2) Failure:
test: Account should only allow numeric values for balance. (AccountTest)
[/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/assertions.rb:50:in `assert_accepts'
/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/active_record/macros.rb:334:in `__bind_1238772668_131158'
/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/context.rb:253:in `call'
/Library/Ruby/Gems/1.8/gems/thoughtbot-shoulda-2.10.1/lib/shoulda/context.rb:253:in `test: Account should only allow numeric values for balance. ']:
errors to include "is not a number" when balance is set to "abcd", got errors: name You didn't provide account name (nil)name Account name must be 4 characters minimum (nil)balance Only numbers allowed for balance (0)