JUnit Testcase Best Practices

Tips for writing great unit tests :

1. Test only one code unit at a time
2. Don’t make unnecessary assertions
3. Make each test independent to all the others
4. Mock out all external services and state
5. Don’t unit-test configuration settings
6. Name your unit tests clearly and consistently
7. Write tests for methods that have the fewest dependencies first, and work your way up
8. All methods, regardless of visibility, should have appropriate unit tests
9. Aim for each unit test method to perform exactly one assertion
10. Create unit tests that target exceptions
11. Use the most appropriate assertion methods.
12. Put assertion parameters in the proper order
13. Ensure that test code is separated from production code
14. Do not print anything out in unit tests
15. Do not use static members in a test class
16. Do not write your own catch blocks that exist only to fail a test
17. Do not rely on indirect testing
18. Integrate Testcases with build script
19. Do not skip unit tests
20. Capture results using the XML formatter