CST438 Module 2

 In lab 1 on Junit you used a Mock.  In your own words describe what a Mock is and why it is useful in unit testing. 

    A mock is a fake Java class that mimics any external dependencies a program might have such as a database or API. It's useful in unit testing as it can give our test a consistent, predictable, and quick alternative to accessing the final production dependencies it might rely on. For example, testing logic on receiving data from an API when that API's output is constantly changing.

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