create a base component

js/tests/unit/alert.spec.js

@@ -170,4 +170,24 @@ describe('Alert', () => {
       expect(fixtureEl.querySelector('.alert')).not.toBeNull()
     })
   })
+
+  describe('getInstance', () => {
+    it('should return alert instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const alert = new Alert(div)
+
+      expect(Alert.getInstance(div)).toEqual(alert)
+      expect(Alert.getInstance(div) instanceof Alert).toEqual(true)
+    })
+
+    it('should return null when there is no alert instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Alert.getInstance(div)).toEqual(null)
+    })
+  })
 })

js/tests/unit/button.spec.js

@@ -128,4 +128,24 @@ describe('Button', () => {
       expect(btnEl.classList.contains('active')).toEqual(false)
     })
   })
+
+  describe('getInstance', () => {
+    it('should return button instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const button = new Button(div)
+
+      expect(Button.getInstance(div)).toEqual(button)
+      expect(Button.getInstance(div) instanceof Button).toEqual(true)
+    })
+
+    it('should return null when there is no button instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Button.getInstance(div)).toEqual(null)
+    })
+  })
 })

js/tests/unit/carousel.spec.js

@@ -1062,6 +1062,26 @@ describe('Carousel', () => {
     })
   })
 
+  describe('getInstance', () => {
+    it('should return carousel instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const carousel = new Carousel(div)
+
+      expect(Carousel.getInstance(div)).toEqual(carousel)
+      expect(Carousel.getInstance(div) instanceof Carousel).toEqual(true)
+    })
+
+    it('should return null when there is no carousel instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Carousel.getInstance(div)).toEqual(null)
+    })
+  })
+
   describe('jQueryInterface', () => {
     it('should create a carousel', () => {
       fixtureEl.innerHTML = '<div></div>'

js/tests/unit/collapse.spec.js

@@ -812,6 +812,7 @@ describe('Collapse', () => {
       const collapse = new Collapse(div)
 
       expect(Collapse.getInstance(div)).toEqual(collapse)
+      expect(Collapse.getInstance(div) instanceof Collapse).toEqual(true)
     })
 
     it('should return null when there is no collapse instance', () => {

js/tests/unit/dropdown.spec.js

@@ -1612,6 +1612,7 @@ describe('Dropdown', () => {
       const dropdown = new Dropdown(div)
 
       expect(Dropdown.getInstance(div)).toEqual(dropdown)
+      expect(Dropdown.getInstance(div) instanceof Dropdown).toEqual(true)
     })
 
     it('should return null when there is no dropdown instance', () => {

js/tests/unit/modal.spec.js

@@ -1108,6 +1108,7 @@ describe('Modal', () => {
       const modal = new Modal(div)
 
       expect(Modal.getInstance(div)).toEqual(modal)
+      expect(Modal.getInstance(div) instanceof Modal).toEqual(true)
     })
 
     it('should return null when there is no modal instance', () => {

js/tests/unit/popover.spec.js

@@ -253,6 +253,7 @@ describe('Popover', () => {
       const popover = new Popover(popoverEl)
 
       expect(Popover.getInstance(popoverEl)).toEqual(popover)
+      expect(Popover.getInstance(popoverEl) instanceof Popover).toEqual(true)
     })
 
     it('should return null when there is no popover instance', () => {

js/tests/unit/scrollspy.spec.js

@@ -634,6 +634,16 @@ describe('ScrollSpy', () => {
   })
 
   describe('getInstance', () => {
+    it('should return scrollspy instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const scrollSpy = new ScrollSpy(div)
+
+      expect(ScrollSpy.getInstance(div)).toEqual(scrollSpy)
+      expect(ScrollSpy.getInstance(div) instanceof ScrollSpy).toEqual(true)
+    })
+
     it('should return null if there is no instance', () => {
       expect(ScrollSpy.getInstance(fixtureEl)).toEqual(null)
     })

js/tests/unit/tab.spec.js

@@ -417,6 +417,7 @@ describe('Tab', () => {
       const tab = new Tab(divEl)
 
       expect(Tab.getInstance(divEl)).toEqual(tab)
+      expect(Tab.getInstance(divEl) instanceof Tab).toEqual(true)
     })
   })
 

js/tests/unit/toast.spec.js

@@ -384,6 +384,7 @@ describe('Toast', () => {
       const toast = new Toast(div)
 
       expect(Toast.getInstance(div)).toEqual(toast)
+      expect(Toast.getInstance(div) instanceof Toast).toEqual(true)
     })
 
     it('should return null when there is no toast instance', () => {

js/tests/unit/tooltip.spec.js

@@ -1030,6 +1030,26 @@ describe('Tooltip', () => {
     })
   })
 
+  describe('getInstance', () => {
+    it('should return tooltip instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+      const alert = new Tooltip(div)
+
+      expect(Tooltip.getInstance(div)).toEqual(alert)
+      expect(Tooltip.getInstance(div) instanceof Tooltip).toEqual(true)
+    })
+
+    it('should return null when there is no tooltip instance', () => {
+      fixtureEl.innerHTML = '<div></div>'
+
+      const div = fixtureEl.querySelector('div')
+
+      expect(Tooltip.getInstance(div)).toEqual(null)
+    })
+  })
+
   describe('jQueryInterface', () => {
     it('should create a tooltip', () => {
       fixtureEl.innerHTML = '<div></div>'