gitlab-org--gitlab-foss/spec/frontend/behaviors/requires_input_spec.js

import $ from 'jquery';
import '~/behaviors/requires_input';

describe('requiresInput', () => {
  let submitButton;
  preloadFixtures('branches/new_branch.html');

  beforeEach(() => {
    loadFixtures('branches/new_branch.html');
    submitButton = $('button[type="submit"]');
  });

  it('disables submit when any field is required', () => {
    $('.js-requires-input').requiresInput();

    expect(submitButton).toBeDisabled();
  });

  it('enables submit when no field is required', () => {
    $('*[required=required]').prop('required', false);
    $('.js-requires-input').requiresInput();

    expect(submitButton).not.toBeDisabled();
  });

  it('enables submit when all required fields are pre-filled', () => {
    $('*[required=required]').remove();
    $('.js-requires-input').requiresInput();

    expect($('.submit')).not.toBeDisabled();
  });

  it('enables submit when all required fields receive input', () => {
    $('.js-requires-input').requiresInput();
    $('#required1')
      .val('input1')
      .change();

    expect(submitButton).toBeDisabled();

    $('#optional1')
      .val('input1')
      .change();

    expect(submitButton).toBeDisabled();

    $('#required2')
      .val('input2')
      .change();
    $('#required3')
      .val('input3')
      .change();
    $('#required4')
      .val('input4')
      .change();
    $('#required5')
      .val('1')
      .change();

    expect($('.submit')).not.toBeDisabled();
  });
});