CODEWITHSUNDEEP
javascriptreactjstestingjestjsreact-testing-library
Uladz Kha
Uladz Kha

Reputation: 2354

How to get Component by dynamic testid using React Testing Library

Currently I'm working on unit tests creation for my project, the part of code I'm writing tests looks like:

  {errors.map(error => (
         <li
          data-testid={`${error.key}-error-item`}
          key={error.key}
          className={error.className}
        >
          <Container>{error.message}</Container>
        </li>
   ))}

I use a dynamic `data-tested key to get this element within tests. My test looks like this:

...
expect(screen.queryAllByTestId(`${error.key}-error-item`).length).toEqual(1)
...

But this test fails, please tell me how can I get items by `dynamic data-tested property?

Upvotes: 1

Views: 5635

Answers (1)

Mikey
Mikey

Reputation: 58

You need to iterate across the same errors you pass into (or expect to receive in your component. For example the following component:

import React from 'react';


const MyComponent = ({errors}) => <div>

{errors.map(error => (
         <li
          data-testid={`${error.key}-error-item`}
          key={error.key}
          className={error.className}
        >
          <div>{error.message}</div>
        </li>
   ))}
</div>

export default MyComponent;

will pass the following test absolutely fine:

import { render, screen } from '@testing-library/react';
import MyComponent from './features/test-feature';

const ERRORS = [{key: 1, className: 'class1'}, {key: 2, className: 'class2'} ]

test('renders learn react link', () => {
  render(<MyComponent errors={ERRORS}/>);

  for(let error of ERRORS){
    expect(screen.queryAllByTestId(`${error.key}-error-item`).length).toEqual(1)
  } 
});

Upvotes: 1

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