Home | History | Annotate | Download | only in os 
      1 package os_test
      2 
      3 import (
      4 	"io/ioutil"
      5 	"os"
      6 	osexec "os/exec"
      7 	"path/filepath"
      8 	"strings"
      9 	"syscall"
     10 	"testing"
     11 )
     12 
     13 var supportJunctionLinks = true
     14 
     15 func init() {
     16 	tmpdir, err := ioutil.TempDir("", "symtest")
     17 	if err != nil {
     18 		panic("failed to create temp directory: " + err.Error())
     19 	}
     20 	defer os.RemoveAll(tmpdir)
     21 
     22 	err = os.Symlink("target", filepath.Join(tmpdir, "symlink"))
     23 	if err != nil {
     24 		err = err.(*os.LinkError).Err
     25 		switch err {
     26 		case syscall.EWINDOWS, syscall.ERROR_PRIVILEGE_NOT_HELD:
     27 			supportsSymlinks = false
     28 		}
     29 	}
     30 	defer os.Remove("target")
     31 
     32 	b, _ := osexec.Command("cmd", "/c", "mklink", "/?").Output()
     33 	if !strings.Contains(string(b), " /J ") {
     34 		supportJunctionLinks = false
     35 	}
     36 }
     37 
     38 func TestSameWindowsFile(t *testing.T) {
     39 	temp, err := ioutil.TempDir("", "TestSameWindowsFile")
     40 	if err != nil {
     41 		t.Fatal(err)
     42 	}
     43 	defer os.RemoveAll(temp)
     44 
     45 	wd, err := os.Getwd()
     46 	if err != nil {
     47 		t.Fatal(err)
     48 	}
     49 	err = os.Chdir(temp)
     50 	if err != nil {
     51 		t.Fatal(err)
     52 	}
     53 	defer os.Chdir(wd)
     54 
     55 	f, err := os.Create("a")
     56 	if err != nil {
     57 		t.Fatal(err)
     58 	}
     59 	f.Close()
     60 
     61 	ia1, err := os.Stat("a")
     62 	if err != nil {
     63 		t.Fatal(err)
     64 	}
     65 
     66 	path, err := filepath.Abs("a")
     67 	if err != nil {
     68 		t.Fatal(err)
     69 	}
     70 	ia2, err := os.Stat(path)
     71 	if err != nil {
     72 		t.Fatal(err)
     73 	}
     74 	if !os.SameFile(ia1, ia2) {
     75 		t.Errorf("files should be same")
     76 	}
     77 
     78 	p := filepath.VolumeName(path) + filepath.Base(path)
     79 	if err != nil {
     80 		t.Fatal(err)
     81 	}
     82 	ia3, err := os.Stat(p)
     83 	if err != nil {
     84 		t.Fatal(err)
     85 	}
     86 	if !os.SameFile(ia1, ia3) {
     87 		t.Errorf("files should be same")
     88 	}
     89 }
     90 
     91 func TestStatJunctionLink(t *testing.T) {
     92 	if !supportJunctionLinks {
     93 		t.Skip("skipping because junction links are not supported")
     94 	}
     95 
     96 	dir, err := ioutil.TempDir("", "go-build")
     97 	if err != nil {
     98 		t.Fatalf("failed to create temp directory: %v", err)
     99 	}
    100 	defer os.RemoveAll(dir)
    101 
    102 	link := filepath.Join(filepath.Dir(dir), filepath.Base(dir)+"-link")
    103 
    104 	output, err := osexec.Command("cmd", "/c", "mklink", "/J", link, dir).CombinedOutput()
    105 	if err != nil {
    106 		t.Fatalf("failed to run mklink %v %v: %v %q", link, dir, err, output)
    107 	}
    108 	defer os.Remove(link)
    109 
    110 	fi, err := os.Stat(link)
    111 	if err != nil {
    112 		t.Fatalf("failed to stat link %v: %v", link, err)
    113 	}
    114 	expected := filepath.Base(dir)
    115 	got := fi.Name()
    116 	if !fi.IsDir() || expected != got {
    117 		t.Fatalf("link should point to %v but points to %v instead", expected, got)
    118 	}
    119 }
    120 
    121 func TestStartProcessAttr(t *testing.T) {
    122 	p, err := os.StartProcess(os.Getenv("COMSPEC"), []string{"/c", "cd"}, new(os.ProcAttr))
    123 	if err != nil {
    124 		return
    125 	}
    126 	defer p.Wait()
    127 	t.Fatalf("StartProcess expected to fail, but succeeded.")
    128 }
    129