Function TestLoopbackMount

core/mount/manager/manager_linux_test.go:39–105

(t *testing.T)

)

func TestLoopbackMount(t *testing.T) {
	testutil.RequiresRoot(t)
	ctx := logtest.WithT(context.Background(), t)
	ctx = namespaces.WithNamespace(ctx, "test")
	td := t.TempDir()
	metadb := filepath.Join(td, "mounts.db")
	targetdir := filepath.Join(td, "m")
	db, err := bolt.Open(metadb, 0600, nil)
	if err != nil {
		t.Fatal(err)
	}

	a := fstest.Apply(
		fstest.CreateFile("/foo", []byte("foo\n"), 0777),
		fstest.CreateDir("/a", 0755),
		fstest.CreateDir("/a/b", 0755),
		fstest.CreateDir("/a/b/c", 0755),
	)

	source, err := initalizeBlockDevice(td, a)
	if err != nil {
		t.Fatal(err)
	}
	mounts := []mount.Mount{
		{
			Type:    "loop",
			Source:  source,
			Options: []string{},
		},
		{
			Type:    "format/ext4",
			Source:  "{{ mount 0 }}", // previous mount
			Options: []string{},
		},
	}

	m, err := NewManager(db, targetdir, WithMountHandler("loop", mount.LoopbackHandler()))
	require.NoError(t, err)
	ainfo, err := m.Activate(ctx, "id1", mounts)
	require.NoError(t, err)
	defer func() {
		assert.NoError(t, m.Deactivate(ctx, "id1"))
	}()

	tm, err := os.MkdirTemp(td, "test-mount-")
	if err != nil {
		t.Fatal(err)
	}

	actual, err := os.MkdirTemp(td, "actual-")
	if err != nil {
		t.Fatal(err)
	}

	if err := a.Apply(actual); err != nil {
		t.Fatal(err)
	}