Basic test helper for Ruby

test_helper.rb

ENV['RACK_ENV']         = 'test'

require 'bundler/setup'

require 'simplecov'
SimpleCov.start do
  add_filter "/test/"
end

require 'test/unit'
require 'contest'
require 'mocha/setup'

$LOAD_PATH.unshift(File.expand_path('../../lib', __FILE__))

class Test::Unit::TestCase
  # Syntactic sugar for defining a memoized helper method.
  def self.let(name, &block)
    ivar = "@#{name}"
    self.class_eval do
      define_method(name) do
        if instance_variable_defined?(ivar)
          instance_variable_get(ivar)
        else
          value = self.instance_eval(&block)
          instance_variable_set(ivar, value)
        end
      end
    end
  end
end