go1.4 TestMain example

testmain_example_test.go

package example_test

import (
	"os"
	"testing"
)

func TestA(t *testing.T) {
}

func TestB(t *testing.T) {
}

func setup() {
	println("setup")
}

func teardown() {
	println("teardown")
}

func TestMain(m *testing.M) {
	setup()
	ret := m.Run()
	if ret == 0 {
		teardown()
	}
	os.Exit(ret)
}