tests := []struct {
		name             string
		driver           string
		makeAttachment   func() *storage.VolumeAttachment
		spec             *volume.Spec
		expectedAttachID string
		expectError      bool
		watchTimeout     time.Duration
	}{
		{
			name:   "successful attach",
			driver: "attachable",
			makeAttachment: func() *storage.VolumeAttachment {