Remove potential false positive assertions (#33288)

* Remove potential false positive assertions

querySelector() returns null but

expect(document.querySelector('...')).toBeDefined()

tests that the value is not undefined

* Migrated assertions from .toBeDefined() to .not.toBeNull() for .getInstance() calls in tests

* Migrate offcanvas assertions from .toBeDefined() to .not.toBeNull() for .getInstance() call

* convert more cases to not.toBeNull assertions

Co-authored-by: XhmikosR <xhmikosr@gmail.com>

13 files changed, 67 insertions, 67 deletions

diff --git a/js/tests/README.md b/js/tests/README.md
index f614499b49..1e96a6b5da 100644
--- a/js/tests/README.md
+++ b/js/tests/README.md
@@ -61,7 +61,7 @@ it('should show a tooltip without the animation', done => {
   tooltipEl.addEventListener('shown.bs.tooltip', () => {
     const tip = document.querySelector('.tooltip')
 
-    expect(tip).toBeDefined()
+    expect(tip).not.toBeNull()
     expect(tip.classList.contains('fade')).toEqual(false)
     done()
   })
diff --git a/js/tests/unit/alert.spec.js b/js/tests/unit/alert.spec.js
index 194da420e9..29b99d7921 100644
--- a/js/tests/unit/alert.spec.js
+++ b/js/tests/unit/alert.spec.js
@@ -134,7 +134,7 @@ describe('Alert', () => {
       const alertEl = document.querySelector('.alert')
       const alert = new Alert(alertEl)
 
-      expect(Alert.getInstance(alertEl)).toBeDefined()
+      expect(Alert.getInstance(alertEl)).not.toBeNull()
 
       alert.dispose()
 
@@ -169,7 +169,7 @@ describe('Alert', () => {
 
       jQueryMock.fn.alert.call(jQueryMock, 'close')
 
-      expect(Alert.getInstance(alertEl)).toBeDefined()
+      expect(Alert.getInstance(alertEl)).not.toBeNull()
       expect(fixtureEl.querySelector('.alert')).toBeNull()
     })
 
@@ -183,7 +183,7 @@ describe('Alert', () => {
 
       jQueryMock.fn.alert.call(jQueryMock)
 
-      expect(Alert.getInstance(alertEl)).toBeDefined()
+      expect(Alert.getInstance(alertEl)).not.toBeNull()
       expect(fixtureEl.querySelector('.alert')).not.toBeNull()
     })
   })
diff --git a/js/tests/unit/button.spec.js b/js/tests/unit/button.spec.js
index e7d92cb6d2..90cf766144 100644
--- a/js/tests/unit/button.spec.js
+++ b/js/tests/unit/button.spec.js
@@ -91,7 +91,7 @@ describe('Button', () => {
       const btnEl = fixtureEl.querySelector('.btn')
       const button = new Button(btnEl)
 
-      expect(Button.getInstance(btnEl)).toBeDefined()
+      expect(Button.getInstance(btnEl)).not.toBeNull()
 
       button.dispose()
 
@@ -126,7 +126,7 @@ describe('Button', () => {
 
       jQueryMock.fn.button.call(jQueryMock, 'toggle')
 
-      expect(Button.getInstance(btnEl)).toBeDefined()
+      expect(Button.getInstance(btnEl)).not.toBeNull()
       expect(btnEl.classList.contains('active')).toEqual(true)
     })
 
@@ -140,7 +140,7 @@ describe('Button', () => {
 
       jQueryMock.fn.button.call(jQueryMock)
 
-      expect(Button.getInstance(btnEl)).toBeDefined()
+      expect(Button.getInstance(btnEl)).not.toBeNull()
       expect(btnEl.classList.contains('active')).toEqual(false)
     })
   })
diff --git a/js/tests/unit/carousel.spec.js b/js/tests/unit/carousel.spec.js
index 75c3bbd6d8..324ff19a70 100644
--- a/js/tests/unit/carousel.spec.js
+++ b/js/tests/unit/carousel.spec.js
@@ -1213,7 +1213,7 @@ describe('Carousel', () => {
 
       jQueryMock.fn.carousel.call(jQueryMock)
 
-      expect(Carousel.getInstance(div)).toBeDefined()
+      expect(Carousel.getInstance(div)).not.toBeNull()
     })
 
     it('should not re create a carousel', () => {
@@ -1271,7 +1271,7 @@ describe('Carousel', () => {
 
       window.dispatchEvent(loadEvent)
 
-      expect(Carousel.getInstance(carouselEl)).toBeDefined()
+      expect(Carousel.getInstance(carouselEl)).not.toBeNull()
     })
 
     it('should create carousel and go to the next slide on click (with real button controls)', done => {
diff --git a/js/tests/unit/collapse.spec.js b/js/tests/unit/collapse.spec.js
index bc7c157714..590b5795c7 100644
--- a/js/tests/unit/collapse.spec.js
+++ b/js/tests/unit/collapse.spec.js
@@ -810,7 +810,7 @@ describe('Collapse', () => {
 
       jQueryMock.fn.collapse.call(jQueryMock)
 
-      expect(Collapse.getInstance(div)).toBeDefined()
+      expect(Collapse.getInstance(div)).not.toBeNull()
     })
 
     it('should not re create a collapse', () => {
diff --git a/js/tests/unit/dropdown.spec.js b/js/tests/unit/dropdown.spec.js
index b0f225140e..57989059d1 100644
--- a/js/tests/unit/dropdown.spec.js
+++ b/js/tests/unit/dropdown.spec.js
@@ -948,8 +948,8 @@ describe('Dropdown', () => {
       const dropdown = new Dropdown(btnDropdown)
 
       expect(dropdown._popper).toBeNull()
-      expect(dropdown._menu).toBeDefined()
-      expect(dropdown._element).toBeDefined()
+      expect(dropdown._menu).not.toBeNull()
+      expect(dropdown._element).not.toBeNull()
       expect(btnDropdown.addEventListener).toHaveBeenCalledWith('click', jasmine.any(Function), jasmine.any(Boolean))
 
       dropdown.dispose()
@@ -974,9 +974,9 @@ describe('Dropdown', () => {
 
       dropdown.toggle()
 
-      expect(dropdown._popper).toBeDefined()
-      expect(dropdown._menu).toBeDefined()
-      expect(dropdown._element).toBeDefined()
+      expect(dropdown._popper).not.toBeNull()
+      expect(dropdown._menu).not.toBeNull()
+      expect(dropdown._element).not.toBeNull()
 
       dropdown.dispose()
 
@@ -1002,7 +1002,7 @@ describe('Dropdown', () => {
 
       dropdown.toggle()
 
-      expect(dropdown._popper).toBeDefined()
+      expect(dropdown._popper).not.toBeNull()
 
       spyOn(dropdown._popper, 'update')
       spyOn(dropdown, '_detectNavbar')
@@ -1886,7 +1886,7 @@ describe('Dropdown', () => {
 
       jQueryMock.fn.dropdown.call(jQueryMock)
 
-      expect(Dropdown.getInstance(div)).toBeDefined()
+      expect(Dropdown.getInstance(div)).not.toBeNull()
     })
 
     it('should not re create a dropdown', () => {
diff --git a/js/tests/unit/modal.spec.js b/js/tests/unit/modal.spec.js
index a09711b349..79f3c4845b 100644
--- a/js/tests/unit/modal.spec.js
+++ b/js/tests/unit/modal.spec.js
@@ -247,9 +247,9 @@ describe('Modal', () => {
       modalEl.addEventListener('shown.bs.modal', () => {
         expect(modalEl.getAttribute('aria-modal')).toEqual('true')
         expect(modalEl.getAttribute('role')).toEqual('dialog')
-        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.getAttribute('aria-hidden')).toBeNull()
         expect(modalEl.style.display).toEqual('block')
-        expect(document.querySelector('.modal-backdrop')).toBeDefined()
+        expect(document.querySelector('.modal-backdrop')).not.toBeNull()
         done()
       })
 
@@ -271,7 +271,7 @@ describe('Modal', () => {
       modalEl.addEventListener('shown.bs.modal', () => {
         expect(modalEl.getAttribute('aria-modal')).toEqual('true')
         expect(modalEl.getAttribute('role')).toEqual('dialog')
-        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.getAttribute('aria-hidden')).toBeNull()
         expect(modalEl.style.display).toEqual('block')
         expect(document.querySelector('.modal-backdrop')).toBeNull()
         done()
@@ -292,7 +292,7 @@ describe('Modal', () => {
 
       modalEl.addEventListener('shown.bs.modal', () => {
         const dynamicModal = document.getElementById(id)
-        expect(dynamicModal).toBeDefined()
+        expect(dynamicModal).not.toBeNull()
         dynamicModal.parentNode.removeChild(dynamicModal)
         done()
       })
@@ -763,8 +763,8 @@ describe('Modal', () => {
       })
 
       modalEl.addEventListener('hidden.bs.modal', () => {
-        expect(modalEl.getAttribute('aria-modal')).toEqual(null)
-        expect(modalEl.getAttribute('role')).toEqual(null)
+        expect(modalEl.getAttribute('aria-modal')).toBeNull()
+        expect(modalEl.getAttribute('role')).toBeNull()
         expect(modalEl.getAttribute('aria-hidden')).toEqual('true')
         expect(modalEl.style.display).toEqual('none')
         expect(document.querySelector('.modal-backdrop')).toBeNull()
@@ -785,8 +785,8 @@ describe('Modal', () => {
       })
 
       modalEl.addEventListener('hidden.bs.modal', () => {
-        expect(modalEl.getAttribute('aria-modal')).toEqual(null)
-        expect(modalEl.getAttribute('role')).toEqual(null)
+        expect(modalEl.getAttribute('aria-modal')).toBeNull()
+        expect(modalEl.getAttribute('role')).toBeNull()
         expect(modalEl.getAttribute('aria-hidden')).toEqual('true')
         expect(modalEl.style.display).toEqual('none')
         expect(document.querySelector('.modal-backdrop')).toBeNull()
@@ -862,7 +862,7 @@ describe('Modal', () => {
 
       modal.dispose()
 
-      expect(Modal.getInstance(modalEl)).toEqual(null)
+      expect(Modal.getInstance(modalEl)).toBeNull()
       expect(EventHandler.off).toHaveBeenCalledTimes(4)
     })
   })
@@ -895,18 +895,18 @@ describe('Modal', () => {
       modalEl.addEventListener('shown.bs.modal', () => {
         expect(modalEl.getAttribute('aria-modal')).toEqual('true')
         expect(modalEl.getAttribute('role')).toEqual('dialog')
-        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.getAttribute('aria-hidden')).toBeNull()
         expect(modalEl.style.display).toEqual('block')
-        expect(document.querySelector('.modal-backdrop')).toBeDefined()
+        expect(document.querySelector('.modal-backdrop')).not.toBeNull()
         setTimeout(() => trigger.click(), 10)
       })
 
       modalEl.addEventListener('hidden.bs.modal', () => {
-        expect(modalEl.getAttribute('aria-modal')).toEqual(null)
-        expect(modalEl.getAttribute('role')).toEqual(null)
+        expect(modalEl.getAttribute('aria-modal')).toBeNull()
+        expect(modalEl.getAttribute('role')).toBeNull()
         expect(modalEl.getAttribute('aria-hidden')).toEqual('true')
         expect(modalEl.style.display).toEqual('none')
-        expect(document.querySelector('.modal-backdrop')).toEqual(null)
+        expect(document.querySelector('.modal-backdrop')).toBeNull()
         done()
       })
 
@@ -947,9 +947,9 @@ describe('Modal', () => {
       modalEl.addEventListener('shown.bs.modal', () => {
         expect(modalEl.getAttribute('aria-modal')).toEqual('true')
         expect(modalEl.getAttribute('role')).toEqual('dialog')
-        expect(modalEl.getAttribute('aria-hidden')).toEqual(null)
+        expect(modalEl.getAttribute('aria-hidden')).toBeNull()
         expect(modalEl.style.display).toEqual('block')
-        expect(document.querySelector('.modal-backdrop')).toBeDefined()
+        expect(document.querySelector('.modal-backdrop')).not.toBeNull()
         expect(Event.prototype.preventDefault).toHaveBeenCalled()
         done()
       })
@@ -1057,7 +1057,7 @@ describe('Modal', () => {
 
       jQueryMock.fn.modal.call(jQueryMock)
 
-      expect(Modal.getInstance(div)).toBeDefined()
+      expect(Modal.getInstance(div)).not.toBeNull()
     })
 
     it('should create a modal with given config', () => {
@@ -1073,7 +1073,7 @@ describe('Modal', () => {
       expect(Modal.prototype.constructor).not.toHaveBeenCalledWith(div, { keyboard: false })
 
       const modal = Modal.getInstance(div)
-      expect(modal).toBeDefined()
+      expect(modal).not.toBeNull()
       expect(modal._config.keyboard).toBe(false)
     })
 
@@ -1153,7 +1153,7 @@ describe('Modal', () => {
 
       const div = fixtureEl.querySelector('div')
 
-      expect(Modal.getInstance(div)).toEqual(null)
+      expect(Modal.getInstance(div)).toBeNull()
     })
   })
 })
diff --git a/js/tests/unit/offcanvas.spec.js b/js/tests/unit/offcanvas.spec.js
index 30edc2913b..64c565318e 100644
--- a/js/tests/unit/offcanvas.spec.js
+++ b/js/tests/unit/offcanvas.spec.js
@@ -560,7 +560,7 @@ describe('Offcanvas', () => {
 
       jQueryMock.fn.offcanvas.call(jQueryMock)
 
-      expect(Offcanvas.getInstance(div)).toBeDefined()
+      expect(Offcanvas.getInstance(div)).not.toBeNull()
     })
 
     it('should not re create an offcanvas', () => {
@@ -678,7 +678,7 @@ describe('Offcanvas', () => {
       expect(Offcanvas.prototype.constructor).not.toHaveBeenCalledWith(div, { scroll: true })
 
       const offcanvas = Offcanvas.getInstance(div)
-      expect(offcanvas).toBeDefined()
+      expect(offcanvas).not.toBeNull()
       expect(offcanvas._config.scroll).toBe(true)
     })
   })
@@ -699,7 +699,7 @@ describe('Offcanvas', () => {
 
       const div = fixtureEl.querySelector('div')
 
-      expect(Offcanvas.getInstance(div)).toEqual(null)
+      expect(Offcanvas.getInstance(div)).toBeNull()
     })
   })
 })
diff --git a/js/tests/unit/popover.spec.js b/js/tests/unit/popover.spec.js
index e5c235e2a9..dc1c4afc13 100644
--- a/js/tests/unit/popover.spec.js
+++ b/js/tests/unit/popover.spec.js
@@ -70,7 +70,7 @@ describe('Popover', () => {
       const popover = new Popover(popoverEl)
 
       popoverEl.addEventListener('shown.bs.popover', () => {
-        expect(document.querySelector('.popover')).toBeDefined()
+        expect(document.querySelector('.popover')).not.toBeNull()
         done()
       })
 
@@ -89,7 +89,7 @@ describe('Popover', () => {
       popoverEl.addEventListener('shown.bs.popover', () => {
         const popoverDisplayed = document.querySelector('.popover')
 
-        expect(popoverDisplayed).toBeDefined()
+        expect(popoverDisplayed).not.toBeNull()
         expect(popoverDisplayed.querySelector('.popover-header').textContent).toEqual('Bootstrap')
         expect(popoverDisplayed.querySelector('.popover-body').textContent).toEqual('loves writing tests （╯°□°）╯︵ ┻━┻')
         done()
@@ -109,7 +109,7 @@ describe('Popover', () => {
       popoverEl.addEventListener('shown.bs.popover', () => {
         const popoverDisplayed = document.querySelector('.popover')
 
-        expect(popoverDisplayed).toBeDefined()
+        expect(popoverDisplayed).not.toBeNull()
         expect(popoverDisplayed.querySelector('.popover-body').textContent).toEqual('Popover content')
         done()
       })
@@ -125,7 +125,7 @@ describe('Popover', () => {
 
       popoverEl.addEventListener('shown.bs.popover', () => {
         const tip = document.querySelector('.popover')
-        expect(tip).toBeDefined()
+        expect(tip).not.toBeNull()
         expect(tip.classList.contains('custom-class')).toBeTrue()
         done()
       })
@@ -165,7 +165,7 @@ describe('Popover', () => {
 
       jQueryMock.fn.popover.call(jQueryMock)
 
-      expect(Popover.getInstance(popoverEl)).toBeDefined()
+      expect(Popover.getInstance(popoverEl)).not.toBeNull()
     })
 
     it('should create a popover with a config object', () => {
@@ -180,7 +180,7 @@ describe('Popover', () => {
         content: 'Popover content'
       })
 
-      expect(Popover.getInstance(popoverEl)).toBeDefined()
+      expect(Popover.getInstance(popoverEl)).not.toBeNull()
     })
 
     it('should not re create a popover', () => {
diff --git a/js/tests/unit/scrollspy.spec.js b/js/tests/unit/scrollspy.spec.js
index c4130a1aa7..6b2a134302 100644
--- a/js/tests/unit/scrollspy.spec.js
+++ b/js/tests/unit/scrollspy.spec.js
@@ -602,7 +602,7 @@ describe('ScrollSpy', () => {
 
       jQueryMock.fn.scrollspy.call(jQueryMock)
 
-      expect(ScrollSpy.getInstance(div)).toBeDefined()
+      expect(ScrollSpy.getInstance(div)).not.toBeNull()
     })
 
     it('should create a scrollspy with given config', () => {
@@ -618,7 +618,7 @@ describe('ScrollSpy', () => {
       expect(ScrollSpy.prototype.constructor).not.toHaveBeenCalledWith(div, { offset: 15 })
 
       const scrollspy = ScrollSpy.getInstance(div)
-      expect(scrollspy).toBeDefined()
+      expect(scrollspy).not.toBeNull()
       expect(scrollspy._config.offset).toBe(15)
     })
 
diff --git a/js/tests/unit/tab.spec.js b/js/tests/unit/tab.spec.js
index c8e1475adb..76d4765258 100644
--- a/js/tests/unit/tab.spec.js
+++ b/js/tests/unit/tab.spec.js
@@ -368,7 +368,7 @@ describe('Tab', () => {
 
       jQueryMock.fn.tab.call(jQueryMock)
 
-      expect(Tab.getInstance(div)).toBeDefined()
+      expect(Tab.getInstance(div)).not.toBeNull()
     })
 
     it('should not re create a tab', () => {
diff --git a/js/tests/unit/toast.spec.js b/js/tests/unit/toast.spec.js
index ea71e2cdb5..62cfc966de 100644
--- a/js/tests/unit/toast.spec.js
+++ b/js/tests/unit/toast.spec.js
@@ -472,7 +472,7 @@ describe('Toast', () => {
 
       const toast = new Toast(toastEl)
 
-      expect(Toast.getInstance(toastEl)).toBeDefined()
+      expect(Toast.getInstance(toastEl)).not.toBeNull()
       expect(toastEl.addEventListener).toHaveBeenCalledWith('click', jasmine.any(Function), jasmine.any(Boolean))
 
       toast.dispose()
@@ -494,7 +494,7 @@ describe('Toast', () => {
       const toast = new Toast(toastEl)
       const expected = () => {
         expect(toastEl.classList.contains('show')).toEqual(true)
-        expect(Toast.getInstance(toastEl)).toBeDefined()
+        expect(Toast.getInstance(toastEl)).not.toBeNull()
 
         toast.dispose()
 
@@ -523,7 +523,7 @@ describe('Toast', () => {
 
       jQueryMock.fn.toast.call(jQueryMock)
 
-      expect(Toast.getInstance(div)).toBeDefined()
+      expect(Toast.getInstance(div)).not.toBeNull()
     })
 
     it('should not re create a toast', () => {
diff --git a/js/tests/unit/tooltip.spec.js b/js/tests/unit/tooltip.spec.js
index 399f1f22a8..0dec2cee46 100644
--- a/js/tests/unit/tooltip.spec.js
+++ b/js/tests/unit/tooltip.spec.js
@@ -194,7 +194,7 @@ describe('Tooltip', () => {
       tooltip.enable()
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
-        expect(document.querySelector('.tooltip')).toBeDefined()
+        expect(document.querySelector('.tooltip')).not.toBeNull()
         done()
       })
 
@@ -267,7 +267,7 @@ describe('Tooltip', () => {
       const tooltip = new Tooltip(tooltipEl)
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
-        expect(document.querySelector('.tooltip')).toBeDefined()
+        expect(document.querySelector('.tooltip')).not.toBeNull()
         done()
       })
 
@@ -386,7 +386,7 @@ describe('Tooltip', () => {
       const tooltip = new Tooltip(tooltipEl)
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
-        expect(document.querySelector('.tooltip')).toBeDefined()
+        expect(document.querySelector('.tooltip')).not.toBeNull()
 
         tooltip.dispose()
 
@@ -408,7 +408,7 @@ describe('Tooltip', () => {
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tooltipShown = document.querySelector('.tooltip')
 
-        expect(tooltipShown).toBeDefined()
+        expect(tooltipShown).not.toBeNull()
         expect(tooltipEl.getAttribute('aria-describedby')).toEqual(tooltipShown.getAttribute('id'))
         expect(tooltipShown.getAttribute('id')).toContain('tooltip')
         done()
@@ -516,7 +516,7 @@ describe('Tooltip', () => {
       })
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
-        expect(fixtureEl.querySelector('.tooltip')).toBeDefined()
+        expect(fixtureEl.querySelector('.tooltip')).not.toBeNull()
         done()
       })
 
@@ -535,7 +535,7 @@ describe('Tooltip', () => {
       })
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
-        expect(fixtureEl.querySelector('.tooltip')).toBeDefined()
+        expect(fixtureEl.querySelector('.tooltip')).not.toBeNull()
         done()
       })
 
@@ -551,7 +551,7 @@ describe('Tooltip', () => {
       })
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
-        expect(fixtureEl.querySelector('.tooltip')).toBeDefined()
+        expect(fixtureEl.querySelector('.tooltip')).not.toBeNull()
         done()
       })
 
@@ -568,7 +568,7 @@ describe('Tooltip', () => {
       })
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
-        expect(document.querySelector('.tooltip')).toBeDefined()
+        expect(document.querySelector('.tooltip')).not.toBeNull()
         expect(spy).toHaveBeenCalled()
         done()
       })
@@ -587,7 +587,7 @@ describe('Tooltip', () => {
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tip = document.querySelector('.tooltip')
 
-        expect(tip).toBeDefined()
+        expect(tip).not.toBeNull()
         expect(tip.classList.contains('fade')).toEqual(false)
         done()
       })
@@ -810,7 +810,7 @@ describe('Tooltip', () => {
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tip = document.querySelector('.tooltip')
-        expect(tip).toBeDefined()
+        expect(tip).not.toBeNull()
         expect(tip.classList.contains('custom-class')).toBeTrue()
         done()
       })
@@ -828,7 +828,7 @@ describe('Tooltip', () => {
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tip = document.querySelector('.tooltip')
-        expect(tip).toBeDefined()
+        expect(tip).not.toBeNull()
         expect(tip.classList.contains('custom-class')).toBeTrue()
         expect(tip.classList.contains('custom-class-2')).toBeTrue()
         done()
@@ -848,7 +848,7 @@ describe('Tooltip', () => {
 
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tip = document.querySelector('.tooltip')
-        expect(tip).toBeDefined()
+        expect(tip).not.toBeNull()
         expect(spy).toHaveBeenCalled()
         expect(tip.classList.contains('custom-class')).toBeTrue()
         done()
@@ -1263,7 +1263,7 @@ describe('Tooltip', () => {
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tooltipShown = document.querySelector('.tooltip')
 
-        expect(tooltipShown).toBeDefined()
+        expect(tooltipShown).not.toBeNull()
         expect(tooltipEl.getAttribute('aria-label')).toEqual('Another tooltip')
         done()
       })
@@ -1280,7 +1280,7 @@ describe('Tooltip', () => {
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tooltipShown = document.querySelector('.tooltip')
 
-        expect(tooltipShown).toBeDefined()
+        expect(tooltipShown).not.toBeNull()
         expect(tooltipEl.getAttribute('aria-label')).toEqual('Different label')
         done()
       })
@@ -1297,7 +1297,7 @@ describe('Tooltip', () => {
       tooltipEl.addEventListener('shown.bs.tooltip', () => {
         const tooltipShown = document.querySelector('.tooltip')
 
-        expect(tooltipShown).toBeDefined()
+        expect(tooltipShown).not.toBeNull()
         expect(tooltipEl.getAttribute('aria-label')).toBeNull()
         done()
       })
@@ -1317,7 +1317,7 @@ describe('Tooltip', () => {
 
       jQueryMock.fn.tooltip.call(jQueryMock)
 
-      expect(Tooltip.getInstance(div)).toBeDefined()
+      expect(Tooltip.getInstance(div)).not.toBeNull()
     })
 
     it('should not re create a tooltip', () => {