ActiveSupport::Testing::Declarative
Methods
T
Instance Public methods
test(name, &block)

Helper to define a test method using a String. Under the hood, it replaces spaces with underscores and defines the test method.

test "verify something" do
  ...
end

Source: show | on GitHub 

# File activesupport/lib/active_support/testing/declarative.rb, line 11
def test(name, &block)
  test_name = "test_#{name.gsub(/\s+/, '_')}".to_sym
  defined = method_defined? test_name
  raise "#{test_name} is already defined in #{self}" if defined
  if block_given?
    define_method(test_name, &block)
  else
    define_method(test_name) do
      flunk "No implementation provided for #{name}"
    end
  end
end