Use IRB to work on WatirWebdriver automation, page objects, and mixins: 1) Start irb, 2) require './path/to/cmdline_tools.rb' 3) use load methods and unload methods as you add more page objects and other methods. Don't keep re-running automated tests to troubleshoot a problem.

cmdline_tools.rb

require 'watir-webdriver'
require 'rspec'

# TODO: Remove the global variable
def load_mixins
  # keep an array of mixins loaded 
$m_constants = mixins
end

def load_pages
  # keep an array of pages loaded
	$p_constants = pages
end

def unload_mixins
	$m_constants.each do |item|
		begin
			Object.send(:remove_const, item)
		rescue => e
			puts e
		end
	end
end

def unload_pages
	$p_constants.each do |item|
		begin
			Object.send(:remove_const, item) 
		rescue => e
			puts e
		end
	end
end

# lazier methods
def unload_all
	unload_mixins
	unload_pages
end

def load_all
	load_mixins
	load_pages
end

def reload
	unload_all
	load_all
end

# camelizing a filename removes the extension and camelizes the remainder
def camelize(file)
	File.basename(file, ".rb").split('_').map {|w| w.capitalize}.join
end

def mixins
 	Dir["./features/support/mixins/*.rb"].collect { |file| 
 		load file
 		camelize(file)
 	}
end

def pages
	Dir["./features/support/pages/*.rb"].collect {|file| 
 		load file 
 		camelize(file)
 	}
end