A simple example just to show you how to set break points using Ruby debug

debugger.rb

require 'debugger'

class Hello
  def hi_there
    debugger
    puts "wohoo"
  end
end

testing = Hello.new

puts "here"

# This will break the code here
# You can carry on running the code by pressing
# continue or c.
# If you can't run the code, run `set autoeval` although you can set this up in a .rdebugrc
debugger
puts "there"

testing.hi_there
testing.hi_there