bvogel

require 'barby'
require 'barby/barcode'
require 'barby/barcode/qr_code'
require 'barby/outputter/png_outputter'

str = 'Hello QrCode!! Using Gem for Barby, Barby-pngOutputter and Chunky-PNG.'

b = Barby::QrCode.new(str, level: :q, size: 10)
File.open('qr.png', 'w') do |f|
  f.write b.to_png

bvogel

#Model 

@user.should have(1).error_on(:username) # Checks whether there is an error in username 
@user.errors[:username].should include("can't be blank")  # check for the error message 

#Rendering
response.should render_template(:index)

#Redirecting 
response.should redirect_to(movies_path)