When writing unit tests I tend to 1) use factories instead of fixtures and 2) keep my factories in synch with model validations. As such, I like to write a test to ensure that out of the box a new instance of a factory object will be valid. Here is a macro to help out with that:
class ActiveSupport::TestCase def self.should_be_valid_with_factory klass = self.name.gsub(/Test$/, '').underscore.to_sym should "be valid with factory" do assert_valid Factory.build(klass) end end end
Put this in your ActiveSupport::TestCase definition and it will be available in all your tests. Simply call it by name with no params:
class BuildingTest < ActiveSupport::TestCase should_be_valid_with_factory end
Naming for this method was inspired by a similar method in Dan Croak's Blitz plugin.