Function mutateProperties

src/cdk/tree/tree.spec.ts:580–587

()

      }

      function mutateProperties() {
        const copiedData = component.dataSource.data.slice();
        copiedData[0] = new TestData('topping_something_new');
        copiedData[1] = new TestData('topping_something_new_1');
        component.dataSource.data = copiedData;
        fixture.changeDetectorRef.markForCheck();
        fixture.detectChanges();
      }

      it('should add/remove/move nodes with reference-based trackBy', () => {
        createTrackByTestComponent('reference');