import github.com/moby/moby/pkg/fsutils (v17.05.0-ce) as fs/fsutils

Signed-off-by: Akihiro Suda <suda.akihiro@lab.ntt.co.jp>

fs/fsutils/fsutils_linux_test.go

@@ -0,0 +1,91 @@
+// +build linux
+
+package fsutils
+
+import (
+	"io/ioutil"
+	"os"
+	"os/exec"
+	"syscall"
+	"testing"
+)
+
+func testSupportsDType(t *testing.T, expected bool, mkfsCommand string, mkfsArg ...string) {
+	// check whether mkfs is installed
+	if _, err := exec.LookPath(mkfsCommand); err != nil {
+		t.Skipf("%s not installed: %v", mkfsCommand, err)
+	}
+
+	// create a sparse image
+	imageSize := int64(32 * 1024 * 1024)
+	imageFile, err := ioutil.TempFile("", "fsutils-image")
+	if err != nil {
+		t.Fatal(err)
+	}
+	imageFileName := imageFile.Name()
+	defer os.Remove(imageFileName)
+	if _, err = imageFile.Seek(imageSize-1, 0); err != nil {
+		t.Fatal(err)
+	}
+	if _, err = imageFile.Write([]byte{0}); err != nil {
+		t.Fatal(err)
+	}
+	if err = imageFile.Close(); err != nil {
+		t.Fatal(err)
+	}
+
+	// create a mountpoint
+	mountpoint, err := ioutil.TempDir("", "fsutils-mountpoint")
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer os.RemoveAll(mountpoint)
+
+	// format the image
+	args := append(mkfsArg, imageFileName)
+	t.Logf("Executing `%s %v`", mkfsCommand, args)
+	out, err := exec.Command(mkfsCommand, args...).CombinedOutput()
+	if len(out) > 0 {
+		t.Log(string(out))
+	}
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// loopback-mount the image.
+	// for ease of setting up loopback device, we use os/exec rather than syscall.Mount
+	out, err = exec.Command("mount", "-o", "loop", imageFileName, mountpoint).CombinedOutput()
+	if len(out) > 0 {
+		t.Log(string(out))
+	}
+	if err != nil {
+		t.Skip("skipping the test because mount failed")
+	}
+	defer func() {
+		if err := syscall.Unmount(mountpoint, 0); err != nil {
+			t.Fatal(err)
+		}
+	}()
+
+	// check whether it supports d_type
+	result, err := SupportsDType(mountpoint)
+	if err != nil {
+		t.Fatal(err)
+	}
+	t.Logf("Supports d_type: %v", result)
+	if result != expected {
+		t.Fatalf("expected %v, got %v", expected, result)
+	}
+}
+
+func TestSupportsDTypeWithFType0XFS(t *testing.T) {
+	testSupportsDType(t, false, "mkfs.xfs", "-m", "crc=0", "-n", "ftype=0")
+}
+
+func TestSupportsDTypeWithFType1XFS(t *testing.T) {
+	testSupportsDType(t, true, "mkfs.xfs", "-m", "crc=0", "-n", "ftype=1")
+}
+
+func TestSupportsDTypeWithExt4(t *testing.T) {
+	testSupportsDType(t, true, "mkfs.ext4")
+}