golang tests 代码
文件路径：/src/cmd/vet/testdata/testingpkg/tests.go
/ Copyright 2018 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 testdata
文件路径：/src/cmd/vet/testdata/testingpkg/tests.go
/ Copyright 2018 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 testdata