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 #### Unit Testing
 
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 How can you ensure that your app continues to work as you add more features or change existing functionality? By writing tests.
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 Unit tests are handy for verifying the behavior of a single function, method, or class. The test package provides the core framework for writing unit tests, and the flutter_test package provides additional utilities for testing widgets.
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 [Continue Reading](https://docs.flutter.dev/cookbook/testing/unit/introduction)
 
 
 #### Mock dependencies using Mockito
 
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 Sometimes, unit tests might depend on classes that fetch data from live web services or databases. This is inconvenient for a few reasons:
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 Calling live services or databases slows down test execution.
 A passing test might start failing if a web service or database returns unexpected results. This is known as a “flaky test.”
 It is difficult to test all possible success and failure scenarios by using a live web service or database.