github.com/rsc/go@v0.0.0-20150416155037-e040fd465409/src/os/os_windows_test.go (about)

     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  }