eslint-plugin-lit-a11y/tests/lib/rules/no-invalid-change-handler.js

linting plugin for lit-a11y

/**
 * @fileoverview Enforce usage of onBlur over onChange for accessibility.
 * @author open-wc
 */

//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------

import { RuleTester } from 'eslint';
import rule from '../../../lib/rules/no-invalid-change-handler.js';

//------------------------------------------------------------------------------
// Tests
//------------------------------------------------------------------------------

const ruleTester = new RuleTester({
  settings: { litHtmlSources: false },
  languageOptions: {
    parserOptions: {
      sourceType: 'module',
      ecmaVersion: 2015,
    },
  },
});

ruleTester.run('no-invalid-change-handler', rule, {
  valid: [{ code: 'html`<select @blur=${foo}></select>`' }, { code: 'html`<div></div>`' }],

  invalid: [
    {
      code: 'html`<select @change=${foo}></select>`',
      errors: [
        {
          message:
            '@blur must be used instead of @change on <select>, unless absolutely necessary and it causes no negative consequences for keyboard only or screen reader users.',
        },
      ],
    },
    {
      code: 'html`<option @change=${foo}></option>`',
      errors: [
        {
          message:
            '@blur must be used instead of @change on <option>, unless absolutely necessary and it causes no negative consequences for keyboard only or screen reader users.',
        },
      ],
    },
  ],
});