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test(fireEvent): Add expected behavior for blur/focus in React #757

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Aug 4, 2020
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test(fireEvent): Add expected behavior for blur/focus in React #757

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27 changes: 27 additions & 0 deletions src/__tests__/events.js
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Original file line number Diff line number Diff line change
Expand Up @@ -211,3 +211,30 @@ test('calling `fireEvent` directly works too', () => {
}),
)
})

test('blur/foucs bubbles in react', () => {
const handleBlur = jest.fn()
const handleBubbledBlur = jest.fn()
const handleFocus = jest.fn()
const handleBubbledFocus = jest.fn()
const {container} = render(
<div onBlur={handleBubbledBlur} onFocus={handleBubbledFocus}>
<button onBlur={handleBlur} onFocus={handleFocus} />
</div>,
)
const button = container.firstChild.firstChild

fireEvent.focus(button)

expect(handleBlur).toHaveBeenCalledTimes(0)
expect(handleBubbledBlur).toHaveBeenCalledTimes(0)
expect(handleFocus).toHaveBeenCalledTimes(1)
expect(handleBubbledFocus).toHaveBeenCalledTimes(1)

fireEvent.blur(button)

expect(handleBlur).toHaveBeenCalledTimes(1)
expect(handleBubbledBlur).toHaveBeenCalledTimes(1)
expect(handleFocus).toHaveBeenCalledTimes(1)
expect(handleBubbledFocus).toHaveBeenCalledTimes(1)
})