Let's see following quote about the role of mocking:
"Mockito is a mocking framework that tastes really good. It lets you write beautiful tests with a clean & simple API. Mockito doesn't give you hangover because the tests are very readable and they produce clean verification errors."
– Mockito. Mockito Framework Site. N.p., n.d. Web. 28 Apr. 2017.
When running tests, it is sometimes necessary to mock certain components within your application context. For example, you may have a facade over some remote service that is unavailable during development. Mocking can also be useful when you want to simulate failures that might be hard to trigger in a real environment. Let's see the following test class where ...
