test(fireEvent): add test spec for read-only target properties

testing-library · Aug 31, 2021 · df76448 · df76448
1 parent b09c02e
commit df76448
Showing 1 changed file with 10 additions and 0 deletions.
diff --git a/src/__tests__/events.js b/src/__tests__/events.js
@@ -366,6 +366,16 @@ test('assigns clipboardData properties', () => {
   expect(clipboardData.getData('text')).toBe('example')
 })
 
+test('assigns read-only target properties', () => {
+  const node = document.createElement('div')
+  const spy = jest.fn()
+  node.addEventListener('scroll', spy)
+
+  expect(node.scrollWidth).toBe(0)
+  fireEvent.scroll(node, {target: {scrollWidth: 10}})
+  expect(node.scrollWidth).toBe(10)
+})
+
 test('fires events on Window', () => {
   const messageSpy = jest.fn()
   window.addEventListener('message', messageSpy)