You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test_find_executable.rb
    path of file: ./repos/jruby/test/mri/mkmf
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require_relative 'base'

class TestMkmf
  class TestFindExecutable < TestMkmf
    def setup
      super
      @path, ENV["PATH"] = ENV["PATH"], @tmpdir
    end

    def each_
    
    def each_exts(&block)
      name = "foobar#{$$}#{rand(1000)}"
      stdout.filter {|s| s.sub(name, "<executable>")}
      exts = mkmf {self.class::CONFIG['EXECUTABLE_EXTS']}.split
      exts[0] ||= ""
      exts.each do |ext|
        yield name+ext, name
      end
    end