4. Unit Tests

• Feel free to use your laptop

• You are strongly encourage to work with others

  • When you get stuck, ask those sitting around you for help

  • Get used to working together in the labs

  • Peer teaching and peer learning has been empirically shown to be very effective

4.1. Before Unit Testing

This lab focuses on writing unit tests for the Course and CourseList classes described in the Objects Lab and Collections Lab respectively. These classes are to be completed before writing the unit tests. If these classes are not complete, complete them before continuing.

4.2. Unit Testing

It is always important to ensure code correctness. For this reason, unit tests are written as they help programmers test their code to demonstrate correctness in a systematic way. While working on this lab, it is strongly recommended to refer to the relevant topic on unit testing.

4.2.1. Testing the Course Class

Note

Give the test methods descriptive names while still being brief. The recommended convention to follow is method_condition_expected(), for example:

• getFirstName_generalCase_returnsFirstName

• size_empty_returnsZero()

• indexOf_singleton_returnsCorrectIndex()

1. Create the test class for Course called CourseTest

2. Write a unit test for getProgramCode

3. Write a unit test for getCourseCode

4. Write a unit test for getCourseTitle

5. Write a unit test for toString

6. Write a unit test for equals

   • Do not write tests for hashCode

4.2.2. Testing the CourseList Class

Warning

Writing unit tests for collections is quite difficult for a variety of reasons. For example, consider that collections can have various different states — empty, single element, many elements, duplicate elements.

Consider remove:

• What should happen when remove is called on an empty CourseList?

• What should happen when remove is called on a CourseList with one element?

• What should happen when calling it on a CourseList with many elements?

• What should happen when trying to remove an element that does not exist in the CourseList?

• What should happen when there are multiple equal Course objects to be removed?

Try to test each method as thoroughly as possible.

1. Write unit tests for add

2. Write unit tests for contains

3. Write unit tests for indexOf

4. Write unit tests for remove

5. Write unit tests for get

6. Write unit tests for size

7. Write unit tests for toString

8. Try to write unit tests for equals

   • Testing equality on collections is very challenging

4.3. Kattis Problems

1. https://open.kattis.com/problems/quadrant

2. https://open.kattis.com/problems/judgingmoose

3. https://open.kattis.com/problems/timeloop

4. https://open.kattis.com/problems/oddities

5. https://open.kattis.com/problems/fizzbuzz

6. https://open.kattis.com/problems/twostones

7. https://open.kattis.com/problems/spavanac

8. https://open.kattis.com/problems/cetvrta

9. https://open.kattis.com/problems/bus

10. https://open.kattis.com/problems/timeloop

11. https://open.kattis.com/problems/oddities

12. https://open.kattis.com/problems/fizzbuzz

13. https://open.kattis.com/problems/sibice

14. https://open.kattis.com/problems/datum

15. https://open.kattis.com/problems/dicecup

16. https://open.kattis.com/problems/autori

17. https://open.kattis.com/problems/apaxiaaans

18. https://open.kattis.com/problems/hissingmicrophone

19. https://open.kattis.com/problems/trik

20. https://open.kattis.com/problems/pot

21. https://open.kattis.com/problems/filip

22. https://open.kattis.com/problems/reversebinary

23. https://open.kattis.com/problems/sevenwonders

24. https://open.kattis.com/problems/zamka

25. https://open.kattis.com/problems/bijele

26. https://open.kattis.com/problems/cold

27. https://open.kattis.com/problems/nastyhacks

28. https://open.kattis.com/problems/grassseed

29. https://open.kattis.com/problems/pet

30. https://open.kattis.com/problems/batterup

31. https://open.kattis.com/problems/aboveaverage

32. https://open.kattis.com/problems/icpcawards

33. https://open.kattis.com/problems/quickbrownfox

34. https://open.kattis.com/problems/nodup

35. https://open.kattis.com/problems/conundrum

36. https://open.kattis.com/problems/bela

37. https://open.kattis.com/problems/kornislav