Feature: improve exported rules test (testing-library#15)

* test: improve exported rules check

With this improvement the test will check that all the rules available under 'lib/rules' folder are properly exposed in the plugin.

* test: rename test

Author: Belco90

lib/index.js

@@ -4,6 +4,7 @@ const rules = {
   'await-async-query': require('./rules/await-async-query'),
   'no-await-sync-query': require('./rules/no-await-sync-query'),
   'no-debug': require('./rules/no-debug'),
+  'no-dom-import': require('./rules/no-dom-import'),
 };
 
 const recommendedRules = {

tests/__snapshots__/index.test.js.snap

@@ -50,11 +50,3 @@ Object {
   },
 }
 `;
-
-exports[`should export proper rules 1`] = `
-Array [
-  "await-async-query",
-  "no-await-sync-query",
-  "no-debug",
-]
-`;

tests/index.test.js

@@ -1,9 +1,14 @@
 'use strict';
 
 const { configs, rules } = require('../lib');
+const fs = require('fs');
+const path = require('path');
 
-it('should export proper rules', () => {
-  expect(Object.keys(rules)).toMatchSnapshot();
+const rulesModules = fs.readdirSync(path.join(__dirname, '/lib/rules'));
+
+it('should export all available rules', () => {
+  const availableRules = rulesModules.map(module => module.replace('.js', ''));
+  expect(Object.keys(rules)).toEqual(availableRules);
 });
 
 it.each(['recommended', 'angular', 'react', 'vue'])(