Use ES6 import in Parser tests

test/specs/parser/index.js

@@ -1,5 +1,5 @@
-const ParserHtml = require('./model/ParserHtml');
-const ParserCss = require('./model/ParserCss');
+import ParserHtml from './model/ParserHtml';
+import ParserCss from './model/ParserCss';
 
 describe('Parser', () => {
   ParserHtml.run();

test/specs/parser/model/ParserCss.js

@@ -1,6 +1,5 @@
 import { parseSelector } from 'parser/model/BrowserParserCss';
-const ParserCss = require('parser/model/ParserCss');
-const Selector = require('selector_manager/model/Selector');
+import ParserCss from 'parser/model/ParserCss';
 
 module.exports = {
   run() {

test/specs/parser/model/ParserHtml.js

@@ -1,6 +1,6 @@
-const ParserHtml = require('parser/model/ParserHtml');
-const ParserCss = require('parser/model/ParserCss');
-const DomComponents = require('dom_components');
+import ParserHtml from 'parser/model/ParserHtml';
+import ParserCss from 'parser/model/ParserCss';
+import DomComponents from 'dom_components';
 
 module.exports = {
   run() {