wip. test checking

Author: GoodDayForSurf

packages/devextreme-cli/testing/app-template.test.shared.js

@@ -46,6 +46,12 @@ module.exports = (env, { port, urls, useDifferentPorts } = { port: '8080', urls:
                             appUrl = `http://${ip.address()}:${currentPort}/`;
                             devServer = new DevServer(env, { port: currentPort });
 
+                            if(page) {
+                                await page.close();
+                            }
+
+                            page = await browser.newPage();
+
                             try {
                                 console.log('----beforeAll--wait-->', currentPort);
                                 await waitOn({