ejemplo de código fireevent.input react-testing-library

Al fin después de mucho trabajar ya hallamos la respuesta de este atolladero que algunos de nuestros usuarios de nuestro espacio han tenido. Si tienes algún detalle que aportar puedes dejar tu información.

Ejemplo: probar entradas con la biblioteca de pruebas de reacción

import React from'react'import render, fireEvent from'@testing-library/react'classCostInputextendsReact.Component 
  state =
    value:'',removeDollarSign= value =>(value[0]==='$'? value.slice(1): value)getReturnValue= value =>(value ===''?'':`$$value`)handleChange= ev =>
    ev.preventDefault()const inputtedValue = ev.currentTarget.value
    const noDollarSign =this.removeDollarSign(inputtedValue)if(isNaN(noDollarSign))returnthis.setState( value:this.getReturnValue(noDollarSign))render()return(<input
        value=this.state.value
        aria-label="cost-input"
        onChange=this.handleChange/>)constsetup=()=>const utils =render(<CostInput />)const input = utils.getByLabelText('cost-input')return
    input,...utils,test('It should keep a $ in front of the input',()=>const input =setup()
  fireEvent.change(input, target: value:'23')expect(input.value).toBe('$23'))test('It should allow a $ to be in the input when the value is changed',()=>const input =setup()
  fireEvent.change(input, target: value:'$23.0')expect(input.value).toBe('$23.0'))test('It should not allow letters to be inputted',()=>const input =setup()expect(input.value).toBe('')// empty before
  fireEvent.change(input, target: value:'Good Day')expect(input.value).toBe('')//empty after)test('It should allow the $ to be deleted',()=>const input =setup()
  fireEvent.change(input, target: value:'23')expect(input.value).toBe('$23')// need to make a change so React registers "" as a change
  fireEvent.change(input, target: value:'')expect(input.value).toBe(''))
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