fix(tree): calling updateItems should not lose the Tree collapsing icon

- calling an update of an row item that is a parent item (with collapse/expand icon) should keep their icon even after an update, it was losing the icon because the Tree structure gets lost and we need to recreate it

src/app/modules/angular-slickgrid/services/__tests__/grid.service.spec.ts

@@ -518,6 +518,52 @@ describe('Grid Service', () => {
       // reset mock
       jest.spyOn(gridStub, 'getOptions').mockReturnValue({});
     });
+
+    it('should invalidate and rerender the tree dataset when grid option "enableTreeData" is set when calling "updateItem"', () => {
+      const mockUpdatedItem = { id: 1, file: 'vacation.txt', size: 2.2, parentId: 0 };
+      const mockFlatDataset = [{ id: 0, file: 'documents' }, { id: 1, file: 'vacation.txt', parentId: 0 }, mockUpdatedItem];
+      const mockHierarchical = [{ id: 0, file: 'documents', files: [{ id: 1, file: 'vacation.txt' }, mockUpdatedItem] }];
+      const mockColumns = [{ id: 'file', field: 'file', }, { id: 'size', field: 'size', }] as Column[];
+
+      jest.spyOn(dataviewStub, 'getItems').mockReturnValue(mockFlatDataset);
+      jest.spyOn(dataviewStub, 'getRowById').mockReturnValue(0);
+      jest.spyOn(treeDataServiceStub, 'convertFlatParentChildToTreeDatasetAndSort').mockReturnValue({ flat: mockFlatDataset as any[], hierarchical: mockHierarchical as any[] });
+      jest.spyOn(gridStub, 'getOptions').mockReturnValue({ enableAutoResize: true, enableRowSelection: true, enableTreeData: true } as GridOption);
+      jest.spyOn(SharedService.prototype, 'allColumns', 'get').mockReturnValue(mockColumns);
+      const setItemSpy = jest.spyOn(dataviewStub, 'setItems');
+      const updateSpy = jest.spyOn(dataviewStub, 'updateItem');
+      const invalidateSpy = jest.spyOn(service, 'invalidateHierarchicalDataset');
+
+      service.updateItem(mockUpdatedItem);
+
+      expect(updateSpy).toHaveBeenCalledTimes(1);
+      expect(updateSpy).toHaveBeenCalledWith(mockUpdatedItem.id, mockUpdatedItem);
+      expect(invalidateSpy).toHaveBeenCalled();
+      expect(setItemSpy).toHaveBeenCalledWith(mockFlatDataset);
+    });
+
+    it('should invalidate and rerender the tree dataset when grid option "enableTreeData" is set when calling "updateItems"', () => {
+      const mockUpdatedItem = { id: 1, file: 'vacation.txt', size: 2.2, parentId: 0 };
+      const mockFlatDataset = [{ id: 0, file: 'documents' }, { id: 1, file: 'vacation.txt', parentId: 0 }, mockUpdatedItem];
+      const mockHierarchical = [{ id: 0, file: 'documents', files: [{ id: 1, file: 'vacation.txt' }, mockUpdatedItem] }];
+      const mockColumns = [{ id: 'file', field: 'file', }, { id: 'size', field: 'size', }] as Column[];
+
+      jest.spyOn(dataviewStub, 'getItems').mockReturnValue(mockFlatDataset);
+      jest.spyOn(dataviewStub, 'getRowById').mockReturnValue(0);
+      jest.spyOn(treeDataServiceStub, 'convertFlatParentChildToTreeDatasetAndSort').mockReturnValue({ flat: mockFlatDataset as any[], hierarchical: mockHierarchical as any[] });
+      jest.spyOn(gridStub, 'getOptions').mockReturnValue({ enableAutoResize: true, enableRowSelection: true, enableTreeData: true } as GridOption);
+      jest.spyOn(SharedService.prototype, 'allColumns', 'get').mockReturnValue(mockColumns);
+      const setItemSpy = jest.spyOn(dataviewStub, 'setItems');
+      const updateSpy = jest.spyOn(dataviewStub, 'updateItems');
+      const invalidateSpy = jest.spyOn(service, 'invalidateHierarchicalDataset');
+
+      service.updateItems([mockUpdatedItem]);
+
+      expect(updateSpy).toHaveBeenCalledTimes(1);
+      expect(updateSpy).toHaveBeenCalledWith([mockUpdatedItem.id], [mockUpdatedItem]);
+      expect(invalidateSpy).toHaveBeenCalled();
+      expect(setItemSpy).toHaveBeenCalledWith(mockFlatDataset);
+    });
   });
 
   describe('addItem methods', () => {

src/app/modules/angular-slickgrid/services/grid.service.ts

@@ -777,6 +777,11 @@ export class GridService {
     // end the bulk transaction since we're all done
     this._dataView.endUpdate();
 
+    if (this._gridOptions?.enableTreeData) {
+      // if we add/remove item(s) from the dataset, we need to also refresh our tree data filters
+      this.invalidateHierarchicalDataset();
+    }
+
     // only highlight at the end, all at once
     // we have to do this because doing highlight 1 by 1 would only re-select the last highlighted row which is wrong behavior
     if (options.highlightRow) {
@@ -819,6 +824,11 @@ export class GridService {
       this._dataView.updateItem(itemId, item);
       this._grid.updateRow(rowNumber);
 
+      if (this._gridOptions?.enableTreeData) {
+        // if we add/remove item(s) from the dataset, we need to also refresh our tree data filters
+        this.invalidateHierarchicalDataset();
+      }
+
       // do we want to scroll to the row so that it shows in the Viewport (UI)
       if (options.scrollRowIntoView) {
         this._grid.scrollRowIntoView(rowNumber);