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Mastering Selenium WebDriver 3.0 by Mark Collin

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A picture paints a thousand words

Even if you have made your tests totally reliable, they will fail occasionally. When this happens, it is often very hard to describe the problem with words alone. If one of your tests failed, wouldn't it be easier to explain what went wrong if you had a picture of what was happening in the browser when things went wrong? I know that when any of my Selenium tests fail, the first thing I want to know is what was on the screen at the time of failure. If I knew what was on the screen at the time of failure, I would be able to diagnose the vast majority of issues without having to hunt through a stack trace for a specific line number, and then go and look at the associated code to try and work out what went wrong. ...

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