mockito-playground

This is a playground project to demonstate Mockito testing framework usage with JUnit4.

Why Mockito doesn't mock private methods?

https://github.com/mockito/mockito/wiki/FAQ#can-i-mock-private-methods

Why Mockito doesn't mock static methods?

https://github.com/mockito/mockito/wiki/FAQ#can-i-mock-static-methods

Which one should I use: mocks or spies?

Prefer mocks overs spies to keep things simple. Spies work partially as the real object and partially have the mocked/overriden behavior and may complicate things. So avoid them, if not necessary to use them.

General best practices on unit tests

1. Readability/Clarity

• naming example: <method_name>Should<expected_result>When<condition_under_test>
• content or test input values: extract anything common to helper methods and supply to the test directly only the specific ones
• BDD style can help in organizing the test: given - when - then

2. Tests should fail only when there are business logic failures

• the test scenarios should isolated from each other
• test scenarios order of execution should not matter
• data dependencies should not exist

Sources

• Concepts demonstrated here were inspired by Ranga's Rao Karanam repository on testing and best practices: https://github.com/in28minutes/MockitoTutorialForBeginners
• https://github.com/ghsukumar/SFDC_Best_Practices/wiki/F.I.R.S.T-Principles-of-Unit-Testing
• https://github.com/mockito/mockito/wiki/How-to-write-good-tests