golang main_test 代码
文件路径：/src/cmd/compile/internal/types2/main_test.go
// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package types2_test
import (
"go/build"
"internal/testenv"
"os"
"testing"
)
func TestMain(m *testing.M) {
build.Default.GOROOT = testenv.GOROOT(nil)
os.Exit(m.Run())
}