AAE-46654 Fix - return empty string when no value is provided in card… (#11969)

* AAE-46654 Fix - return empty string when no value is provided in card view text item

* uncomment code

lib/core/src/lib/card-view/components/card-view-textitem/card-view-textitem.component.spec.ts

@@ -899,6 +899,26 @@ describe('CardViewTextItemComponent', () => {
             expect(await getTextFieldValue(component.property.key)).toEqual(expectedNumber.toString());
             expect(component.property.value).toBe(expectedNumber.toString());
         });
+
+        it('should set property value to empty string when value is cleared', async () => {
+            const itemUpdatedSpy = spyOn(cardViewUpdateService.itemUpdated$, 'next');
+
+            await updateTextField(component.property.key, '');
+            await fixture.whenStable();
+
+            expect(itemUpdatedSpy).toHaveBeenCalledWith({
+                target: { ...component.property, isValidValue: true },
+                changed: {
+                    textkey: ''
+                },
+                previousValue: {
+                    textkey: 10
+                }
+            });
+
+            verifyNoErrors(component.property.key);
+            expect(component.property.value).toBe('');
+        });
     });
 
     describe('float', () => {

lib/core/src/lib/card-view/components/card-view-textitem/card-view-textitem.component.ts

@@ -251,6 +251,10 @@ export class CardViewTextItemComponent extends BaseCardView<CardViewTextItemMode
     }
 
     private prepareIntLongValue(value: string): string {
+        if (value === '') {
+            return '';
+        }
+
         return String(Math.trunc(Number(value)));
     }
 }