github.com/code-reading/golang@v0.0.0-20220303082512-ba5bc0e589a3/go/src/os/exec/lp_unix_test.go (about) 1 // Copyright 2013 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 //go:build aix || darwin || dragonfly || freebsd || linux || netbsd || openbsd || solaris 6 // +build aix darwin dragonfly freebsd linux netbsd openbsd solaris 7 8 package exec 9 10 import ( 11 "os" 12 "testing" 13 ) 14 15 func TestLookPathUnixEmptyPath(t *testing.T) { 16 tmp, err := os.MkdirTemp("", "TestLookPathUnixEmptyPath") 17 if err != nil { 18 t.Fatal("TempDir failed: ", err) 19 } 20 defer os.RemoveAll(tmp) 21 wd, err := os.Getwd() 22 if err != nil { 23 t.Fatal("Getwd failed: ", err) 24 } 25 err = os.Chdir(tmp) 26 if err != nil { 27 t.Fatal("Chdir failed: ", err) 28 } 29 defer os.Chdir(wd) 30 31 f, err := os.OpenFile("exec_me", os.O_CREATE|os.O_EXCL, 0700) 32 if err != nil { 33 t.Fatal("OpenFile failed: ", err) 34 } 35 err = f.Close() 36 if err != nil { 37 t.Fatal("Close failed: ", err) 38 } 39 40 t.Setenv("PATH", "") 41 42 path, err := LookPath("exec_me") 43 if err == nil { 44 t.Fatal("LookPath found exec_me in empty $PATH") 45 } 46 if path != "" { 47 t.Fatalf("LookPath path == %q when err != nil", path) 48 } 49 }