integration_to_unit.rb

#GistID: dd1f4bffde8b23192433df1c93685b2e
require 'pry'
class Test
  def first_call(f)
    a = f
    b = 2
    res = second_call(a,b)
    puts "\n\n=== result res:#{res} ===\n\n"
    return res
  end

  def second_call(aay, bbee)
    return aay * bbee
  end
end

trace = TracePoint.new(:call, :return) do |tp|
  p ["#{tp.event} #{tp.defined_class}##{tp.method_id}:#{tp.lineno}", tp.self.method(tp.method_id).parameters.inspect, tp.binding.local_variables.map{|a| [a, tp.binding.local_variable_get(a)]} , tp.event == :return ? tp.return_value : "nop"]
  #binding.pry
end

trace.enable
t = Test.new
v = t.first_call(ARGV[0])
puts  "final #{v}"