fix: make fireEvent mouseEnter/mouseLeave work with addEventListener (#588)

* fix: make fireEvent mouseEnter/mouseLeave work with addEventListener (#577)

* Add tests for native events

* fix: make fireEvent select work with addEventListener. Improve organization of native events test.

Closes #577

Author: zbrogz

src/__tests__/events.js

@@ -153,6 +153,41 @@ eventTypes.forEach(({type, events, elementType, init}) => {
   })
 })
 
+eventTypes.forEach(({type, events, elementType, init}) => {
+  describe(`Native ${type} Events`, () => {
+    events.forEach(eventName => {
+      let nativeEventName = eventName.toLowerCase()
+
+      // The doubleClick synthetic event maps to the dblclick native event
+      if (nativeEventName === 'doubleclick') {
+        nativeEventName = 'dblclick'
+      }
+
+      it(`triggers native ${nativeEventName}`, () => {
+        const ref = React.createRef()
+        const spy = jest.fn()
+        const Element = elementType
+
+        const NativeEventElement = () => {
+          React.useEffect(() => {
+            const element = ref.current
+            element.addEventListener(nativeEventName, spy)
+            return () => {
+              element.removeEventListener(nativeEventName, spy)
+            }
+          })
+          return <Element ref={ref} />
+        }
+
+        render(<NativeEventElement />)
+
+        fireEvent[eventName](ref.current, init)
+        expect(spy).toHaveBeenCalledTimes(1)
+      })
+    })
+  })
+})
+
 test('onChange works', () => {
   const handleChange = jest.fn()
   const {

src/pure.js

@@ -128,10 +128,20 @@ Object.keys(dtlFireEvent).forEach(key => {
 // React event system tracks native mouseOver/mouseOut events for
 // running onMouseEnter/onMouseLeave handlers
 // @link https://github.com/facebook/react/blob/b87aabdfe1b7461e7331abb3601d9e6bb27544bc/packages/react-dom/src/events/EnterLeaveEventPlugin.js#L24-L31
-fireEvent.mouseEnter = fireEvent.mouseOver
-fireEvent.mouseLeave = fireEvent.mouseOut
+const mouseEnter = fireEvent.mouseEnter
+const mouseLeave = fireEvent.mouseLeave
+fireEvent.mouseEnter = (...args) => {
+  mouseEnter(...args)
+  return fireEvent.mouseOver(...args)
+}
+fireEvent.mouseLeave = (...args) => {
+  mouseLeave(...args)
+  return fireEvent.mouseOut(...args)
+}
 
+const select = fireEvent.select
 fireEvent.select = (node, init) => {
+  select(node, init)
   // React tracks this event only on focused inputs
   node.focus()