chore(*): Add test for new API.

Author: MKirova

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

@@ -812,6 +812,17 @@ describe('Basic IgxPivotGrid #pivotGrid', () => {
             expect((rowChip1.nativeElement.previousElementSibling as any).style.visibility).toBe('hidden');
             expect((rowChip1.nativeElement.nextElementSibling as any).style.visibility).toBe('hidden');
         });
+
+        it('should auto-size row dimension via the API.', () => {
+            const pivotGrid = fixture.componentInstance.pivotGrid;
+            const rowDimension = pivotGrid.pivotConfiguration.rows[0];
+            expect(rowDimension.width).toBeUndefined();
+            expect(pivotGrid.resolveRowDimensionWidth(rowDimension)).toBe(200);
+            pivotGrid.autoSizeRowDimension(rowDimension);
+            fixture.detectChanges();
+            expect(rowDimension.width).toBe('186px');
+            expect(pivotGrid.resolveRowDimensionWidth(rowDimension)).toBe(186);
+        });
     });
 });