fix(test): fixed ProvidePlugin.test.js (#2002)

Author: knagaitsev

Diff for: test/e2e/ProvidePlugin.test.js

@@ -4,7 +4,7 @@ const testServer = require('../helpers/test-server');
 const config = require('../fixtures/provide-plugin-config/webpack.config');
 const runBrowser = require('../helpers/run-browser');
 
-describe.skip('ProvidePlugin', () => {
+describe('ProvidePlugin', () => {
   describe('inline', () => {
     beforeAll((done) => {
       const options = {

Diff for: test/fixtures/provide-plugin-config/foo.js

@@ -1,6 +1,7 @@
 'use strict';
 
-const SockJSClient = require('../../../client-src/clients/SockJSClient');
+// 'npm run prepare' must be run for this to work during testing
+const SockJSClient = require('../../../client/clients/SockJSClient');
 
 window.expectedClient = SockJSClient;
 // eslint-disable-next-line camelcase, no-undef