wip. checking test for nextjs-ts

Author: GoodDayForSurf

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

@@ -46,7 +46,9 @@ module.exports = (env, { port } = { port: '8080' }) => {
                                 await devServer.setLayout(layout);
                                 await devServer.setTheme(theme);
                                 await devServer.build();
+                                console.log('-----build----->');
                                 await devServer.start();
+                                console.log('-----start----->');
                             } catch(e) {
                                 // NOTE jest@27 will fail test, but jest@26 - not
                                 console.log('----throw new Error------>', e);
@@ -62,6 +64,7 @@ module.exports = (env, { port } = { port: '8080' }) => {
                             const viewport = viewports[viewportName];
 
                             async function openPage(url, options) {
+                                console.log('-------openPage--->', url);
                                 await page.goto('about:blank');
                                 await page.setViewport(viewport);
                                 await page.goto(url, {
@@ -157,7 +160,8 @@ module.exports = (env, { port } = { port: '8080' }) => {
                             }
 
                             describe(`${viewportName}`, () => {
-                                it('Home view', async() => {
+                                fit('Home view', async() => {
+                                    console.log('---START TEST------>');
                                     await openPage(appUrl, { timeout: 5000 });
                                     await page.reload([{
                                         waitUntil: {

packages/devextreme-cli/testing/dev-server.js

@@ -16,7 +16,6 @@ module.exports = class DevServer {
         if(this.env.engine.indexOf('nextjs') === 0) {
             if(startedPromise) {
                 startedPromise.kill();
-                startedPromise = null;
             }
             startedPromise = runCommand('npm', ['run', 'start'], {
                 cwd: this.env.appPath,