github.com/dlintw/docker@v1.5.0-rc4/pkg/mount/mount_test.go (about)

     1  package mount
     2  
     3  import (
     4  	"os"
     5  	"path"
     6  	"testing"
     7  )
     8  
     9  func TestMountOptionsParsing(t *testing.T) {
    10  	options := "noatime,ro,size=10k"
    11  
    12  	flag, data := parseOptions(options)
    13  
    14  	if data != "size=10k" {
    15  		t.Fatalf("Expected size=10 got %s", data)
    16  	}
    17  
    18  	expectedFlag := NOATIME | RDONLY
    19  
    20  	if flag != expectedFlag {
    21  		t.Fatalf("Expected %d got %d", expectedFlag, flag)
    22  	}
    23  }
    24  
    25  func TestMounted(t *testing.T) {
    26  	tmp := path.Join(os.TempDir(), "mount-tests")
    27  	if err := os.MkdirAll(tmp, 0777); err != nil {
    28  		t.Fatal(err)
    29  	}
    30  	defer os.RemoveAll(tmp)
    31  
    32  	var (
    33  		sourceDir  = path.Join(tmp, "source")
    34  		targetDir  = path.Join(tmp, "target")
    35  		sourcePath = path.Join(sourceDir, "file.txt")
    36  		targetPath = path.Join(targetDir, "file.txt")
    37  	)
    38  
    39  	os.Mkdir(sourceDir, 0777)
    40  	os.Mkdir(targetDir, 0777)
    41  
    42  	f, err := os.Create(sourcePath)
    43  	if err != nil {
    44  		t.Fatal(err)
    45  	}
    46  	f.WriteString("hello")
    47  	f.Close()
    48  
    49  	f, err = os.Create(targetPath)
    50  	if err != nil {
    51  		t.Fatal(err)
    52  	}
    53  	f.Close()
    54  
    55  	if err := Mount(sourceDir, targetDir, "none", "bind,rw"); err != nil {
    56  		t.Fatal(err)
    57  	}
    58  	defer func() {
    59  		if err := Unmount(targetDir); err != nil {
    60  			t.Fatal(err)
    61  		}
    62  	}()
    63  
    64  	mounted, err := Mounted(targetDir)
    65  	if err != nil {
    66  		t.Fatal(err)
    67  	}
    68  	if !mounted {
    69  		t.Fatalf("Expected %s to be mounted", targetDir)
    70  	}
    71  	if _, err := os.Stat(targetDir); err != nil {
    72  		t.Fatal(err)
    73  	}
    74  }
    75  
    76  func TestMountReadonly(t *testing.T) {
    77  	tmp := path.Join(os.TempDir(), "mount-tests")
    78  	if err := os.MkdirAll(tmp, 0777); err != nil {
    79  		t.Fatal(err)
    80  	}
    81  	defer os.RemoveAll(tmp)
    82  
    83  	var (
    84  		sourceDir  = path.Join(tmp, "source")
    85  		targetDir  = path.Join(tmp, "target")
    86  		sourcePath = path.Join(sourceDir, "file.txt")
    87  		targetPath = path.Join(targetDir, "file.txt")
    88  	)
    89  
    90  	os.Mkdir(sourceDir, 0777)
    91  	os.Mkdir(targetDir, 0777)
    92  
    93  	f, err := os.Create(sourcePath)
    94  	if err != nil {
    95  		t.Fatal(err)
    96  	}
    97  	f.WriteString("hello")
    98  	f.Close()
    99  
   100  	f, err = os.Create(targetPath)
   101  	if err != nil {
   102  		t.Fatal(err)
   103  	}
   104  	f.Close()
   105  
   106  	if err := Mount(sourceDir, targetDir, "none", "bind,ro"); err != nil {
   107  		t.Fatal(err)
   108  	}
   109  	defer func() {
   110  		if err := Unmount(targetDir); err != nil {
   111  			t.Fatal(err)
   112  		}
   113  	}()
   114  
   115  	f, err = os.OpenFile(targetPath, os.O_RDWR, 0777)
   116  	if err == nil {
   117  		t.Fatal("Should not be able to open a ro file as rw")
   118  	}
   119  }
   120  
   121  func TestGetMounts(t *testing.T) {
   122  	mounts, err := GetMounts()
   123  	if err != nil {
   124  		t.Fatal(err)
   125  	}
   126  
   127  	root := false
   128  	for _, entry := range mounts {
   129  		if entry.Mountpoint == "/" {
   130  			root = true
   131  		}
   132  	}
   133  
   134  	if !root {
   135  		t.Fatal("/ should be mounted at least")
   136  	}
   137  }