NEED HELP WITH WRITING THE TEST METHOD FOR THE METHOD BELOW IN JAVA.

/**

* picks a random item from the bag

*

* @return the item in the thats picked

*/

@Override

public T pick() {

if (isEmpty()) {

return null;

}

TestableRandom generator = new TestableRandom();

int index = generator.nextInt(numberOfEntries);

Node node = firstNode;

for (int i = 0; i < index; i++) {

node = node.getNext();

}

return node.getData();

}