Always Maximize Browser Window (Selenium Web Driver + JUnit + ExtJS)

Selenium WebDriver test will fail if you ask it to click a button that is out of sight. Since WebDriver is designed to simulates human interaction, this behavior is correct. But for most of us, scrolling the object into view is a trivial task that is not the subject of testing. So to reduce a lot of trivial errors like this, it's usually preferable to start browser window in maximum size.

Here is the Java code to maximize browser window:
  WebDriver driver;
  ... 
  driver.manage().window().maximize();