switch to multiple tabs in same window in selenium code example

Example 1: multiple tabs in selenium

Selenium stays on one window. If you open a window and then 5 tabs popped open,
selenium is focused on the first window
If you are on a new window and you tell selenium to print an element on 
the default window, it will still work even that user’s focus is on the 
new window. Must switch to new window:

    - Use windowHandle()
    - Driver.getWindowHandle()
   - Everytime Selenium opens a browser, it's going to give an index ID
   for the page  called Handles
      - Returns the handle/id of current page (as a string)
      - driver.switchTo().window(string handle)
      - driver.getWindowHandles()  for multiple windows
Returns a Set of window handles
      - Switch using titles:
  	for(string handle: driver.getWindowHandles()){                            
		driver.switchTo().Window(handle)                            
	   		 if(driver.getTitle().equals(targetTitle)
	      			break;

Example 2: how to handle tabs in selenium

How do we handle windows/tabs?
    - We have to switch driver's focus to different window to be able to 
    handle that one using window handles.
    
    - windowHandle: is a unique alphanumerical string randomly generated 
    for each window/tab.
    
    -> To get single window handle?
 -If we want to get the currently open window's handle: driver.getWindowHandle();
- What is the return type of driver.getWindowHandle();
        - String
-> How do we get all of the handles of the currently open windows?
    - driver.getWindowHandles(); 
    - Return type: Set<String>
    syntax: driver.switchTo().window(WINDOWHANDLE);