register_spec_type(*args, &block)public
Register a new type of spec that matches the spec’s description. This method can take either a Regexp and a spec class or a spec class and a block that takes the description and returns true if it matches.
Eg:
register_spec_type(/Controller$/, MiniTest::Spec::Rails)
or:
register_spec_type(MiniTest::Spec::RailsModel) do |desc| desc.superclass == ActiveRecord::Base end