Selenium has 3 core components:
        
        
        1) A Browser plug-in to record manual tests
            this is the Selenium IDE
            
        2) A tool to support automated testing in Java/.Net/Python/etc   
            Java classes and is call Web Driver <- this is the focus of our class
            
        3) A tool to do "mass test" and control test machines remotely
            this the Grid, this runs a set of Web Driver tests on
            a number of computers, using different Browsers
            
            
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       Here is how WebDriver works:
       
       My Java code creates a WebDriver Object that will access a Browser,
       then using that object it open a URL, find a spot on the web page
       fill in/click that spot, do the next User Action, repeat...
       
       
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       On the Lab Machine we have:
       
       Chrome
       FireFox
       Edge
       IE
       
       in addition to these Browser installations
       WebDriver can test w/ in-memory Browser