test.go

var programBinary string

func setup(dir string) {
	program := `package main
....
}`

	goFileName := dir + "/main.go"

	err := ioutil.WriteFile(goFileName, []byte(program), 0644)
	if err != nil {
		log.Fatal(err)
	}

	programBinary = dir + "/stub"
	exec.Command("go", "build", "-o", programBinary, goFileName).Run()
}

func clean(dir string) {
	err := os.Remove(dir + "/main.go")
	if err != nil {
		log.Fatal(err)
	}

	err = os.Remove(dir + "/stub")
	if err != nil {
		log.Fatal(err)
	}
}