fix(igxHierarchicalGrid): Fix column grid owner before copying column for child. (#15206)

Author: MayaKirova

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-grid-base.directive.ts

@@ -207,6 +207,7 @@ export abstract class IgxHierarchicalGridBaseDirective extends IgxGridBaseDirect
         const columns = [];
         const topLevelCols = cols.filter(c => c.level === 0);
         topLevelCols.forEach((col) => {
+            col.grid = this;
             const ref = this._createColumn(col);
             ref.changeDetectorRef.detectChanges();
             columns.push(ref.instance);

projects/igniteui-angular/src/lib/grids/hierarchical-grid/hierarchical-grid.spec.ts

@@ -1038,6 +1038,23 @@ describe('Basic IgxHierarchicalGrid #hGrid', () => {
             expect(hierarchicalGrid.childLayoutList.first.columns.length).toEqual(0, 'Columns length should be 0 after toggle');
             expect(hierarchicalGrid.childLayoutList.first.columnList.length).toEqual(0, 'ColumnList length should be 0 after toggle');
         }));
+
+        it('should resolve child grid cols default editable prop correctly based on row island\'s rowEditable.', () => {
+            hierarchicalGrid.rowEditable = false;
+            hierarchicalGrid.childLayoutList.first.rowEditable = true;
+            fixture.detectChanges();
+            // expand row
+            const row = hierarchicalGrid.gridAPI.get_row_by_index(0) as IgxHierarchicalRowComponent;
+            UIInteractions.simulateClickAndSelectEvent(row.expander);
+            fixture.detectChanges();
+
+            //check child grid column are editable
+            const childGrids =  fixture.debugElement.queryAll(By.css('igx-child-grid-row'));
+            const childGrid1 = childGrids[0].query(By.css('igx-hierarchical-grid')).componentInstance;
+
+            expect(childGrid1.columns[0].editable).toBeTrue();
+            expect(childGrid1.columns[1].editable).toBeTrue();
+        });
     });
 
     describe('IgxHierarchicalGrid Children Sizing #hGrid', () => {