Unable to set focus in new tab in Chrome browser in selenium? - selenium

Question

I am trying to read object on a new tab but driver focus is not shifting on that. Here is a scenario:
1. Open Gmail.
2. Click on "term" link below Gmail site. New Tab will get open.
3. Read any object from new tab of term link.
Unable to do step 3. Here is code
WebDriver driver= new ChromeDriver();
driver.get("http://gmail.com");
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
Thread.sleep(2000);
String Mainwindow = driver.getWindowHandle();
boolean Term = driver.findElement(By.xpath("//*[#id='footer-list']/li[3]/a")).isDisplayed();
if(Term){
driver.findElement(By.xpath("//*[#id='footer-list']/li[3]/a")).click();
}
else{
driver.findElement(By.xpath("html/body/footer/div/div[5]/div[1]/a[4]")).click();
// this is written for IE and Mozila
}
Set<String> set = driver.getWindowHandles();
System.out.println(set.size());
Iterator<String> it = set.iterator();
String main =it.next();
String maintab =it.next();
System.out.println(maintab);
driver.switchTo().window(maintab);
Thread.sleep(10000);
driver.findElement(By.xpath("//*[#id='maia-nav-y']/ul/li[1]")).sendKeys(Keys.PAGE_DOWN);
Thread.sleep(3000);
driver.findElement(By.xpath(".//*[#id='maia-nav-y']/ul/li[1]")).sendKeys(Keys.PAGE_UP);
Thread.sleep(3000);
driver.findElement(By.xpath(".//*[#id='maia-nav-y']/ul/li[1]")).sendKeys(Keys.BACK_SPACE);
driver.switchTo().window(main);
}}

Answer 1

Use Array List instead of Set. As Set stores the elements by using a mechanism called hashing. So String 'main' or 'mainTab' may not have right window handle to switch.

Answer 2

May be you need to try this:
driver.switchTo().window("windowName");

Answer 3

Webdriver is successfully able to switch to the new tab. However, you are trying to invoke sendKeys API on a control which is not an input element.
If you just want to scroll page down and up in the new tab, you can do that using JavascriptExecutor, as shown in the below code:
WebDriver driver= new ChromeDriver();
driver.get("http://gmail.com");
driver.manage().window().maximize();
driver.manage().timeouts().implicitlyWait(10, TimeUnit.SECONDS);
Thread.sleep(2000);
String Mainwindow = driver.getWindowHandle();
boolean Term = driver.findElement(By.xpath("//*[#id='footer-list']/li[3]/a")).isDisplayed();
if(Term){
driver.findElement(By.xpath("//*[#id='footer-list']/li[3]/a")).click();
}
else{
driver.findElement(By.xpath("html/body/footer/div/div[5]/div[1]/a[4]")).click();
// this is written for IE and Mozila
}
Set<String> set = driver.getWindowHandles();
System.out.println(set.size());
Iterator<String> it = set.iterator();
String main =it.next();
String maintab =it.next();
System.out.println(maintab);
driver.switchTo().window(maintab);
Thread.sleep(10000);
//Using JavaScriptExecutor
//Scroll page down
JavascriptExecutor jscriptExec = (JavascriptExecutor)driver;
jscriptExec.executeScript("window.scrollBy(0,250)", "");
//Scroll page up
jscriptExec.executeScript("window.scrollBy(0,-250)", "");
//driver.findElement(By.xpath("//*[#id='maia-nav-y']/ul/li[1]")).sendKeys(Keys.PAGE_DOWN);
//Thread.sleep(3000);
//driver.findElement(By.xpath(".//*[#id='maia-nav-y']/ul/li[1]")).sendKeys(Keys.PAGE_UP);
//Thread.sleep(3000);
//driver.findElement(By.xpath(".//*[#id='maia-nav-y']/ul/li[1]")).sendKeys(Keys.BACK_SPACE);
driver.switchTo().window(main);
driver.quit();