1 // Copyright 2015 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package runtime_test 6 7 import ( 8 "runtime" 9 "syscall" 10 "testing" 11 ) 12 13 func TestFixedGOROOT(t *testing.T) { 14 if runtime.GOOS == "plan9" { 15 t.Skipf("skipping plan9, it is inconsistent by allowing GOROOT to be updated by Setenv") 16 } 17 18 // Restore both the real GOROOT environment variable, and runtime's copies: 19 if orig, ok := syscall.Getenv("GOROOT"); ok { 20 defer syscall.Setenv("GOROOT", orig) 21 } else { 22 defer syscall.Unsetenv("GOROOT") 23 } 24 envs := runtime.Envs() 25 oldenvs := append([]string{}, envs...) 26 defer runtime.SetEnvs(oldenvs) 27 28 // attempt to reuse existing envs backing array. 29 want := runtime.GOROOT() 30 runtime.SetEnvs(append(envs[:0], "GOROOT="+want)) 31 32 if got := runtime.GOROOT(); got != want { 33 t.Errorf(`initial runtime.GOROOT()=%q, want %q`, got, want) 34 } 35 if err := syscall.Setenv("GOROOT", "/os"); err != nil { 36 t.Fatal(err) 37 } 38 if got := runtime.GOROOT(); got != want { 39 t.Errorf(`after setenv runtime.GOROOT()=%q, want %q`, got, want) 40 } 41 if err := syscall.Unsetenv("GOROOT"); err != nil { 42 t.Fatal(err) 43 } 44 if got := runtime.GOROOT(); got != want { 45 t.Errorf(`after unsetenv runtime.GOROOT()=%q, want %q`, got, want) 46 } 47 } 48
