<s>[INST] We have a class `SimpleLinkedList` that has a method `size()` which returns the number of elements in the list. The list is implemented as a linked list, where each element is a node that points to the next element in the list.

We want to test this method to make sure it is working correctly.

Here is the code:

```java
public class SimpleLinkedList<T> {
    // ... other methods ...

    public int size() {
        int size = 0;
        Node current = head;
        while (current != null) {
            size++;
            current = current.next;
        }
        return size;
    }
}

public class SimpleLinkedListTest {
    @Test
    public void testSize() {
        // Arrange
        SimpleLinkedList<String> list = new SimpleLinkedList<>();
        list.add("apple");
        list.add("banana");
        list.add("cherry");

        // Act
        int size = list.size();

        // Assert
        assertEquals(3, size);
    }
}
```

How can we improve this test to make it more robust?[/INST]