enzyme render simulate click code example

Example 1: react enzyme simulate click

// App.js
function App() {
  const [count, setCount] = React.useState(0)

  const onClick = () => {
    setCount((prevState) => prevState + 1)
  }

  return (
    <div>
      <button onClick={onClick}>{count}</button>
    </div>
  )
}

export default App

//App.test.js
describe('Counter Group', () => {
  it('calls incCounter function when button is clicked', () => {
    const wrapper = shallow(<App />)
    const initClickCount = 2

    for (let i = 0; i < initClickCount; i++) {
      wrapper.find('button').simulate('click')
    }

    expect(wrapper.find('button').text()).toContain(2)

    console.log(wrapper.debug())
  })
})

Example 2: react enzyme simulate click sub component

//Counter.js
import React from 'react'

function Counter() {
  const [count, setCount] = React.useState(0)

  const onClick = () => setCount((prevState) => prevState + 1)

  return (
    <div>
      <button onClick={onClick}>{count}</button>
    </div>
  )
}

export default Counter

//App.js
import React from 'react'
import Counter from './Counter'

const App = (props) => {
  return (
    <>
      <Counter />
    </>
  )
}

export default App

//App.test.js
import React from 'react'
import { mount } from 'enzyme'
import App from './App'
import Counter from './Counter'

describe('Counter Group', () => {
  it('calls incCounter function when button is clicked', () => {
    const wrapper = mount(<App />)
    const subComponent = wrapper.find(Counter)
    const initClickCount = 2

    expect(subComponent.find('button').exists()).toBeTruthy()

    for (let i = 0; i < initClickCount; i++) {
      subComponent.find('button').simulate('click')
    }

    expect(subComponent.find('button').text()).toContain(2)

    console.log(wrapper.debug())
  })
})