CHC4010 DevOps Week 5 Practical: Automated Testing

Part I. Find the biggest number in the array

1. In the exercise1 folder, find the file Max.java and copy the file into the src folder of your project. Read, execute, and understand the code.

2. Follow the steps demonstrated in the lecture and create an automated test for the max() method using the testing library JUnit5. You should NOT use the same logic in the test as the tested method itself. Don’t fall into the self-test trap!

Part II. A student database implemented with array

1. Open the exercise2 folder and copy the file inside src into the src folder of your project. Copy the file inside test into the test folder of your project (you should have already created a test folder for the previous exercise!).

2. Run StudentDBTest.java and you will see that some tests are failing. This is due to a bug in getStudents() method. Fix getStudents() method in StudentDB.java so that the test for getStudents() passed. (It’s okay that other tests might still be failing at this point.)

3. Read the documentation of addStudent() and create an automated test for this method. Before writing the test code, make list of the functional properties we should test for.

4. Implement removeStudent() in a way that would pass the removeStudent() test.

5. In its initial state, findStudent() uses linear search to find a certain student in the database. Since students are kept sorted in alphabetical order, we can use binary search to improve efficiency. Adapt the binarySearch() method given in StudentDB.java and use it to find a student in the database.

After this change, run the all the tests again. Did your change break any existing feature? Do we need to update the tests for any of the public methods? Why or why not?

[!TIP] 🔗 Practice codes 🔗 Solution codes