Editor tabs are not restored after refreshing browser tab

Describe the bug

The selenium tests fails because Editor tabs are not restored after refreshing browser tab.

• ProjectStateAfterRefreshTest.checkRestoreStateOfProjectAfterRefreshTest failure on nightly build https://ci.codenvycorp.com/view/qa-nightly/job/che-integration-tests-multiuser-master-ocp/850/Selenium_20tests_20report/failsafe-report.html#org.eclipse.che.selenium.workspaces.ProjectStateAfterRefreshTest

Driver info: org.eclipse.che.selenium.core.SeleniumWebDriver
	at org.openqa.selenium.support.ui.WebDriverWait.timeoutException(WebDriverWait.java:80)
	at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:265)
	at org.eclipse.che.selenium.core.webdriver.SeleniumWebDriverHelper.waitVisibility(SeleniumWebDriverHelper.java:151)
	at org.eclipse.che.selenium.core.webdriver.SeleniumWebDriverHelper.waitVisibility(SeleniumWebDriverHelper.java:161)
	at org.eclipse.che.selenium.pageobject.theia.TheiaEditor.waitEditorTab(TheiaEditor.java:126)
	at org.eclipse.che.selenium.workspaces.ProjectStateAfterRefreshTest.checkFilesAreOpened(ProjectStateAfterRefreshTest.java:89)
	at org.eclipse.che.selenium.workspaces.ProjectStateAfterRefreshTest.checkRestoreStateOfProjectAfterRefreshTest(ProjectStateAfterRefreshTest.java:76)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:696)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:882)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1189)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.openqa.selenium.NoSuchElementException: no such element: Unable to locate element: {"method":"xpath","selector":"//ul[@class='p-TabBar-content']//li[contains(@title, 'pom.xml')]"}
  (Session info: chrome=71.0.3578.98)
  (Driver info: chromedriver=2.45.615279 (12b89733300bd268cff3b78fc76cb8f3a7cc44e5),platform=Linux 3.10.0-862.11.6.el7.x86_64 x86_64) (WARNING: The server did not provide any stacktrace information)

• ProjectStateAfterRenameWorkspaceTest.checkProjectAfterRenameWs failure on nightly build: https://ci.codenvycorp.com/view/qa-nightly/job/che-integration-tests-multiuser-master-ocp/850/Selenium_20tests_20report/failsafe-report.html#org.eclipse.che.selenium.workspaces.ProjectStateAfterRenameWorkspaceTest

Driver info: org.eclipse.che.selenium.core.SeleniumWebDriver
	at org.openqa.selenium.support.ui.WebDriverWait.timeoutException(WebDriverWait.java:80)
	at org.openqa.selenium.support.ui.FluentWait.until(FluentWait.java:265)
	at org.eclipse.che.selenium.core.webdriver.SeleniumWebDriverHelper.waitVisibility(SeleniumWebDriverHelper.java:151)
	at org.eclipse.che.selenium.core.webdriver.SeleniumWebDriverHelper.waitVisibility(SeleniumWebDriverHelper.java:161)
	at org.eclipse.che.selenium.pageobject.theia.TheiaEditor.waitEditorTab(TheiaEditor.java:126)
	at org.eclipse.che.selenium.workspaces.ProjectStateAfterRenameWorkspaceTest.checkFilesAreOpened(ProjectStateAfterRenameWorkspaceTest.java:109)
	at org.eclipse.che.selenium.workspaces.ProjectStateAfterRenameWorkspaceTest.checkProjectAfterRenameWs(ProjectStateAfterRenameWorkspaceTest.java:94)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:696)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:882)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1189)
	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
Caused by: org.openqa.selenium.NoSuchElementException: no such element: Unable to locate element: {"method":"xpath","selector":"//ul[@class='p-TabBar-content']//li[contains(@title, 'pom.xml')]"}
  (Session info: chrome=71.0.3578.98)
  (Driver info: chromedriver=2.45.615279 (12b89733300bd268cff3b78fc76cb8f3a7cc44e5),platform=Linux 3.10.0-862.11.6.el7.x86_64 x86_64) (WARNING: The server did not provide any stacktrace information)

Che version

• latest
• nightly
• other: please specify

Runtime

• kubernetes (include output of kubectl version)
• Openshift 3.9 (include output of oc version)
• minikube (include output of minikube version and kubectl version)
• minishift (include output of minishift version and oc version)
• docker-desktop + K8S (include output of docker version and kubectl version)
• other: (please specify)

Environment

• my computer
  • Windows
  • Linux
  • macOS
• Cloud
  • Amazon
  • Azure
  • GCE
  • other (please specify)
• other: Codenvy CI

[dmytro-ndp]

There are dedicated E2E tests, which check that tabs are being restored after refresh of browser tab. That beheviour was treated as important, so as it’s quite usual situation when user has a lot of opened files, and from some reasons has lost connection to server, or workspace has stopped by timeout. And it’s expected user would not need to find and reopen files after restoring access to his workspace.

[azatsarynnyy]

Thanks @SkorikSergey for checking it!