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My problem statement is related to interacting with a web based terminal
through selenium

• I logged into one site.


• I clicked on specific Jupyter application


• I selected terminal in the Jupyter application


• I have landed on a blank black screen where I need to pass the below
  command and get the access token.

Command

curl -X POST https://dummyterminal/oauth/token -k -H 

'authorization: Basic Authcode'  -H 'content-type: application/x-www- 

 form-urlencoded'  -d 

 'username=username&password=#password&grant_type=password' 

I tried to capture the whole flow from Selenium IDE also, in order to find out if terminal has some web element or not
For terminal it is showing the web element as
cssSelector("canvas.xterm-cursor-layer") through Selenium IDE, but when I ran with same web element it has thrown below error

I tried searching on Google also but most of the solutions were related interaction of putty with Java code means interaction of desktop
application which is putty with Java code but in my case I need
interaction with web based terminal(which is kind of putty) with selenium
so that I can paste my commands there and retrieve the output

I am not able to paste the above command in the web based terminal,
getting below error:-

output:-

    org.openqa.selenium.WebDriverException: unknown error: cannot focus element

              (Session info: chrome=70.0.3538.77)

              (Driver info: chromedriver=2.36.540470 (e522d04694c7ebea4ba8821272dbef4f9b818c91),platform=Windows NT 10.0.16299 x86_64) (WARNING: The server did not provide any stacktrace information)

            Command duration or timeout: 70 milliseconds

            Build info: version: '2.53.0', revision: 'XXXX', time: '2016-03-15 16:57:40'

            System info: host: 'XXXX', ip: 'XXXXXX', os.name: 'Windows 10', os.arch: 'amd64', os.version: '10.0', java.version: '1.8.0_191'

            Driver info: org.openqa.selenium.chrome.ChromeDriver

            Capabilities [{applicationCacheEnabled=false, rotatable=false, mobileEmulationEnabled=false, networkConnectionEnabled=false, chrome={chromedriverVersion=2.36.540470 (e522d04694cxxxx7e21272dbef4f9b818c91), userDataDir=C:UsersXXXXX[enter image description here][1]AppDataLocalTempscoped_dir3736_24657}, takesHeapSnapshot=true, pageLoadStrategy=normal, databaseEnabled=false, handlesAlerts=true, hasTouchScreen=false, version=70.0.3538.77, platform=XP, browserConnectionEnabled=false, nativeEvents=true, acceptSslCerts=false, acceptInsecureCerts=false, locationContextEnabled=true, webStorageEnabled=true, browserName=chrome, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true, setWindowRect=true, unexpectedAlertBehaviour=}]

            Session ID: f629216f0f8cvvvvvv6f7d95

                at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)

                at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)

                at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)

                at java.lang.reflect.Constructor.newInstance(Unknown Source)

                at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:206)

                at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:158)

                at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:678)

                at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:327)

                at org.openqa.selenium.remote.RemoteWebElement.sendKeys(RemoteWebElement.java:122)

                at getToken.getAccessToken.captureTerminalOutput(getAccessToken.java:52)

                at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

                at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

                at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

                at java.lang.reflect.Method.invoke(Unknown Source)

                at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85)

                at org.testng.internal.Invoker.invokeMethod(Invoker.java:639)

                at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:816)

                at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1124)

                at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:125)

                at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108)

                at org.testng.TestRunner.privateRun(TestRunner.java:774)

                at org.testng.TestRunner.run(TestRunner.java:624)

                at org.testng.SuiteRunner.runTest(SuiteRunner.java:359)

                at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:354)

                at org.testng.SuiteRunner.privateRun(SuiteRunner.java:312)

                at org.testng.SuiteRunner.run(SuiteRunner.java:261)

                at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)

                at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)

                at org.testng.TestNG.runSuitesSequentially(TestNG.java:1215)

                at org.testng.TestNG.runSuitesLocally(TestNG.java:1140)

                at org.testng.TestNG.run(TestNG.java:1048)

                at org.testng.remote.AbstractRemoteTestNG.run(AbstractRemoteTestNG.java:114)

                at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:251)

                at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:77)





            ===============================================

                Default test

                Tests run: 1, Failures: 1, Skips: 0

            ===============================================





            ===============================================

            Default suite

            Total tests run: 1, Failures: 1, Skips: 0

            ===============================================

For terminal it is showing the web element as cssSelector("canvas.xterm-cursor-layer")....

Selenium and any other DOM based tools can not automate actions inside a canvas element. For these tools, the canvas element is one big black box and they can not see inside (xpath locators do not work).

A good solution for canvas test automation is to use Kantu Seleniium IDE with the real-user simulation xmodule installed (open source, free). This gives you the xclick and xtype commands, and they work great for canvas element testing. XClicks takes images as input, so instead of xpaths or CSS selectors, you use images to tell XClick where to click. Same for Xtype, which is a sendkeys-like command.