spec(excel-style-date-expression): fix failing test

Author: simeonoff

projects/igniteui-angular/src/lib/grids/filtering/excel-style/excel-style-date-expression.component.html

@@ -27,7 +27,6 @@
         [outlet]="grid.outlet"
         (click)="picker.open()"
         [placeholder]="inputDatePlaceholder"
-        [displayFormat]="column.pipeArgs.format"
         [formatter]="column.formatter"
         [disabled]="expressionUI.expression.condition && expressionUI.expression.condition.isUnary"
         type="box"

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

@@ -5388,8 +5388,8 @@ describe('IgxGrid - Filtering actions - Excel style filtering #grid', () => {
 
             // Verify the results are with 'today' date.
             const filteredDate = SampleTestData.today;
-            const inputText = column.formatter(filteredDate, null);
-            expect((input as HTMLInputElement).value).toMatch(inputText);
+            const datePickerDebugEl = fix.debugElement.query(By.directive(IgxDatePickerComponent));
+            expect(datePickerDebugEl.componentInstance.value).toEqual(filteredDate);
 
             // Click 'apply' button to apply filter.
             GridFunctions.clickApplyExcelStyleCustomFiltering(fix);