Validated value testing?

Question

Vue.js

Hello. Tell me please. I still can’t write a test in Jest to check a valid value. The VeeValidate plugin is used, I found an official example , but it doesn't seem to work.

import { createLocalVue, shallow } from '@vue/test-utils';
import flushPromises from 'flush-promises';
import VeeValidate from 'vee-validate';
import Vuetify from 'vuetify';
import SignUp from './../../src/views/SignUp.vue';

const localVue = createLocalVue( );
localVue.use( VeeValidate );
localVue.use( Vuetify );

describe( 'SignUp', ( ) => {
  it( 'should invalid field username length less 5', async ( ) => {
    const wrapper = shallow( SignUp, { localVue } );

    expect( wrapper.vm.errors.count( ) ).toBe( 0 );

    wrapper.setData( { username: 'asdf' } );
    await flushPromises( );
    expect( wrapper.vm.errors.has( 'username' ) ).toBe( true );
  } );

Mistake

spoiler

FAIL  tests\unit\SignUp.spec.js
  SignUp
    × should invalid field username length less 5 (44ms)

  ● SignUp › should invalid field username length less 5

    expect(received).toBe(expected) // Object.is equality

    Expected value to be:
      true
    Received:
      false

      18 |     // await wrapper.vm.$validator.validateAll( );
      19 |     await flushPromises( );
    > 20 |     await expect( wrapper.vm.errors.has( 'username' ) ).toBe( true );
      21 |   } );
      22 |
      23 |

      at Object._callee$ (tests/unit/SignUp.spec.js:20:57)
      at tryCatch (node_modules/regenerator-runtime/runtime.js:62:40)
      at Generator.invoke [as _invoke] (node_modules/regenerator-runtime/runtime.js:296:22)
      at Generator.prototype.(anonymous function) [as next] (node_modules/regenerator-runtime/runtime.js:114:21)
      at step (node_modules/@babel/runtime/helpers/asyncToGenerator.js:12:30)
      at _next (node_modules/@babel/runtime/helpers/asyncToGenerator.js:27:9)

Test Suites: 1 failed, 1 total
Tests:       1 failed, 1 total
Snapshots:   0 total
Time:        3.971s
Ran all test suites.
 ERROR  jest exited with code 1.
error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

Thank you.