tests: try to fix a few random failures (#35184)

* Change `Swipe` dispose spy on EventHandler
* Modal hide spy on backdrop hide

js/tests/unit/carousel.spec.js

@@ -1268,6 +1268,7 @@ describe('Carousel', () => {
 
       carousel.dispose()
 
+      expect(carousel._swipeHelper).toBeNull()
       expect(removeEventSpy).toHaveBeenCalledWith(carouselEl, Carousel.EVENT_KEY)
       expect(swipeHelperSpy).toHaveBeenCalled()
 

js/tests/unit/modal.spec.js

@@ -608,6 +608,7 @@ describe('Modal', () => {
 
       const modalEl = fixtureEl.querySelector('.modal')
       const modal = new Modal(modalEl)
+      const backdropSpy = spyOn(modal._backdrop, 'hide').and.callThrough()
 
       modalEl.addEventListener('shown.bs.modal', () => {
         modal.hide()
@@ -622,7 +623,7 @@ describe('Modal', () => {
         expect(modalEl.getAttribute('role')).toBeNull()
         expect(modalEl.getAttribute('aria-hidden')).toEqual('true')
         expect(modalEl.style.display).toEqual('none')
-        expect(document.querySelector('.modal-backdrop')).toBeNull()
+        expect(backdropSpy).toHaveBeenCalled()
         done()
       })
 

js/tests/unit/util/swipe.spec.js

@@ -232,7 +232,7 @@ describe('Swipe', () => {
 
     it('should destroy', () => {
       const addEventSpy = spyOn(fixtureEl, 'addEventListener').and.callThrough()
-      const removeEventSpy = spyOn(fixtureEl, 'removeEventListener').and.callThrough()
+      const removeEventSpy = spyOn(EventHandler, 'off').and.callThrough()
       defineDocumentElementOntouchstart()
 
       const swipe = new Swipe(fixtureEl)
@@ -253,9 +253,8 @@ describe('Swipe', () => {
 
       swipe.dispose()
 
-      expect(removeEventSpy.calls.allArgs()).toEqual(expectedArgs)
+      expect(removeEventSpy).toHaveBeenCalledWith(fixtureEl, '.bs.swipe')
-
+      deleteDocumentElementOntouchstart()
-      delete document.documentElement.ontouchstart
     })
   })