fix(module:button): prevent default event fire (#7267)

* fix(module:button): prevent default event fire

* test(module:button): add test case

* test(module:button): update test logic

* test(module:button): revert test case name

* chore(module:button): resolve test case fail

Author: chenc041

components/button/button.component.ts

@@ -141,10 +141,10 @@ export class NzButtonComponent implements OnDestroy, OnChanges, AfterViewInit, A
       // The compiler generates the `ɵɵlistener` instruction which wraps the actual listener internally into the
       // function, which runs `markDirty()` before running the actual listener (the decorated class method).
       // Since we're preventing the default behavior and stopping event propagation this doesn't require Angular to run the change detection.
-      fromEvent<MouseEvent>(this.elementRef.nativeElement, 'click')
+      fromEvent<MouseEvent>(this.elementRef.nativeElement, 'click', { capture: true })
         .pipe(takeUntil(this.destroy$))
         .subscribe(event => {
-          if (this.disabled && (event.target as HTMLElement)?.tagName === 'A') {
+          if ((this.disabled && (event.target as HTMLElement)?.tagName === 'A') || this.nzLoading) {
             event.preventDefault();
             event.stopImmediatePropagation();
           }

components/button/button.spec.ts

@@ -180,6 +180,17 @@ describe('button', () => {
       // Previously, it would've caused `tick()` to be called 2 times, because 2 click events have been triggered.
       expect(spy).toHaveBeenCalledTimes(0);
     });
+
+    it('prevent default and stop propagation when the button state is loading', fakeAsync(() => {
+      testBed.component.nzLoading = true;
+      testBed.fixture.detectChanges();
+      const event = new MouseEvent('click');
+      const preventDefaultSpy = spyOn(event, 'preventDefault').and.callThrough();
+      const stopImmediatePropagationSpy = spyOn(event, 'stopImmediatePropagation').and.callThrough();
+      buttonElement.dispatchEvent(event);
+      expect(preventDefaultSpy).toHaveBeenCalledTimes(1);
+      expect(stopImmediatePropagationSpy).toHaveBeenCalledTimes(1);
+    }));
   });
 });
 
@@ -281,6 +292,13 @@ export class TestButtonIconOnlyComponent {}
 })
 export class TestButtonIconOnlyLoadingComponent {}
 
+@Component({
+  template: `<button nz-button [nzLoading]="nzLoading" (click)="buttonClick()">click me</button> `
+})
+export class TestButtonWithLoadingComponent {
+  @Input() nzLoading: boolean = false;
+}
+
 @Component({
   template: `
     <div [dir]="direction">