fix(module:transfer): not setting the move button disable state (#8824)

* fix(module:tabs): wrong cursor

* fix(module:transfer): not setting the move btn disable state

* fix(module:transfer): not setting the move btn disable state

components/transfer/transfer.component.ts

@@ -246,6 +246,7 @@ export class NzTransferComponent implements OnInit, OnChanges, OnDestroy {
   handleSelect(direction: TransferDirection, checked: boolean, item?: TransferItem): void {
     const list = this.getCheckedData(direction);
     if (list.every(i => i.disabled)) {
+      this.updateOperationStatus(direction, 0);
       return;
     }
     this.updateOperationStatus(direction, list.length);

components/transfer/transfer.spec.ts

@@ -114,6 +114,16 @@ describe('transfer', () => {
       expect(instance.comp.rightDataSource.filter(w => !w.hide).length).toBe(COUNT - LEFTCOUNT + 1);
     });
 
+    it('should have correct disable state on moving buttons', () => {
+      const transferOperationButtons: DebugElement[] = dl.queryAll(By.css('.ant-transfer-operation > button'));
+      const transferToRightButton: HTMLElement = transferOperationButtons[1].nativeNode;
+      expect((transferToRightButton as NzSafeAny)['disabled']).toEqual(true);
+      pageObject.checkItem('left', 0);
+      expect((transferToRightButton as NzSafeAny)['disabled']).toEqual(false);
+      pageObject.checkItem('left', 0);
+      expect((transferToRightButton as NzSafeAny)['disabled']).toEqual(true);
+    });
+
     it('should be custom filter option', () => {
       instance.nzFilterOption = (inputValue: string, item: NzSafeAny): boolean =>
         item.description.indexOf(inputValue) > -1;