fix(combo): don't clear items when disabled #8200

Author: Lipata

projects/igniteui-angular/src/lib/combo/combo.component.spec.ts

@@ -19,7 +19,6 @@ import { DisplayDensity } from '../core/density';
 import { AbsoluteScrollStrategy, ConnectedPositioningStrategy } from '../services/public_api';
 import { IgxSelectionAPIService } from '../core/selection';
 import { IgxIconService } from '../icon/public_api';
-import { CancelableEventArgs } from '../core/utils';
 
 const CSS_CLASS_COMBO = 'igx-combo';
 const CSS_CLASS_COMBO_DROPDOWN = 'igx-combo__drop-down';
@@ -602,6 +601,38 @@ describe('igxCombo', () => {
             expect(combo.onSearchInput.emit).toHaveBeenCalledTimes(1);
             expect(matchSpy).toHaveBeenCalledTimes(1);
         });
+        it('should not open on click if combo is disabled', () => {
+            combo = new IgxComboComponent(elementRef, mockCdr, mockSelection as any, mockComboService,
+                mockIconService, null, null, mockInjector);
+            const dropdown = jasmine.createSpyObj('IgxComboDropDownComponent', ['open', 'close', 'toggle']);
+            const spyObj = jasmine.createSpyObj('event', ['stopPropagation', 'preventDefault']);
+            spyOn(mockIconService, 'addSvgIconFromText').and.returnValue(null);
+            combo.ngOnInit();
+            combo.dropdown = dropdown;
+            dropdown.collapsed = true;
+
+            combo.disabled = true;
+            combo.onInputClick(spyObj);
+            expect(combo.dropdown.collapsed).toBeTruthy();
+        });
+        it('should not clear value when combo is disabled', () => {
+            const selectionService = new IgxSelectionAPIService();
+            combo = new IgxComboComponent(elementRef, mockCdr, selectionService, mockComboService,
+                mockIconService, null, null, mockInjector);
+            const dropdown = jasmine.createSpyObj('IgxComboDropDownComponent', ['selectItem']);
+            const spyObj = jasmine.createSpyObj('event', ['stopPropagation']);
+            spyOn(mockIconService, 'addSvgIconFromText').and.returnValue(null);
+            combo.ngOnInit();
+            combo.data = data;
+            combo.dropdown = dropdown;
+            combo.disabled = true;
+            spyOnProperty(combo, 'totalItemCount').and.returnValue(combo.data.length);
+
+            const item = combo.data.slice(0, 1);
+            combo.selectItems(item, true);
+            combo.handleClearItems(spyObj);
+            expect(combo.value).toEqual(item[0]);
+        });
     });
     describe('Initialization and rendering tests: ', () => {
         configureTestSuite();
@@ -2541,13 +2572,6 @@ describe('igxCombo', () => {
                 expect(combo.valid).toEqual(IgxComboState.INITIAL);
                 expect(combo.comboInput.valid).toEqual(IgxInputState.INITIAL);
             });
-            it('should not open on click if combo is disabled', () => {
-                combo.disabled = true;
-                fixture.detectChanges();
-                UIInteractions.simulateClickEvent(combo.comboInput.nativeElement);
-                fixture.detectChanges();
-                expect(combo.dropdown.collapsed).toBeTruthy();
-            });
             it('should be possible to be enabled/disabled when used as a form control', () => {
                 const form = fixture.componentInstance.reactiveForm;
                 const comboFormReference = form.controls.townCombo;

projects/igniteui-angular/src/lib/combo/combo.component.ts

@@ -1324,11 +1324,13 @@ export class IgxComboComponent extends DisplayDensityBase implements IgxComboBas
      * @hidden @internal
      */
     public handleClearItems(event: Event): void {
-        this.deselectAllItems(true, event);
-        if (this.collapsed) {
-            this.getEditElement().focus();
-        } else {
-            this.focusSearchInput(true);
+        if (!this.disabled) {
+            this.deselectAllItems(true, event);
+            if (this.collapsed) {
+                this.getEditElement().focus();
+            } else {
+                this.focusSearchInput(true);
+            }
         }
         event.stopPropagation();
     }