// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime_test
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import (
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"runtime"
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"syscall"
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"testing"
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)
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func TestFixedGOROOT(t *testing.T) {
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if runtime.GOOS == "plan9" {
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t.Skipf("skipping plan9, it is inconsistent by allowing GOROOT to be updated by Setenv")
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}
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// Restore both the real GOROOT environment variable, and runtime's copies:
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if orig, ok := syscall.Getenv("GOROOT"); ok {
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defer syscall.Setenv("GOROOT", orig)
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} else {
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defer syscall.Unsetenv("GOROOT")
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}
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envs := runtime.Envs()
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oldenvs := append([]string{}, envs...)
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defer runtime.SetEnvs(oldenvs)
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// attempt to reuse existing envs backing array.
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want := runtime.GOROOT()
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runtime.SetEnvs(append(envs[:0], "GOROOT="+want))
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if got := runtime.GOROOT(); got != want {
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t.Errorf(`initial runtime.GOROOT()=%q, want %q`, got, want)
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}
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if err := syscall.Setenv("GOROOT", "/os"); err != nil {
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t.Fatal(err)
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}
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if got := runtime.GOROOT(); got != want {
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t.Errorf(`after setenv runtime.GOROOT()=%q, want %q`, got, want)
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}
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if err := syscall.Unsetenv("GOROOT"); err != nil {
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t.Fatal(err)
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}
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if got := runtime.GOROOT(); got != want {
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t.Errorf(`after unsetenv runtime.GOROOT()=%q, want %q`, got, want)
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}
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}
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