Java 9 Programming By Example

Refactor the test

Now that we have discussed what a good unit test is, let's improve our test. The first thing is to move the supporting classes to separate files. We will create ArrayListSortableCollection:

package packt.java9.by.example.ch03.bubble; import packt.java9.by.example.ch03.SortableCollection; import java.util.ArrayList; public class ArrayListSortableCollection implements SortableCollection {     final private ArrayList actualNames;     ArrayListSortableCollection(ArrayList actualNames) {         this.actualNames = actualNames;     }     @Override     public Object get(int i) {         return actualNames.get(i);     }     @Override     public int size() {         return actualNames.size();     } }

This class encapsulates ArrayList and then implements the get and size methods ...