CS 451 Software Engineering
Lab 4: Software Testing
Due: 3/13/2009
Goals:
In this lab, you will apply techniques from the previous two lectures for testing a maze
game system. You will practice using the JUnit and EMMA tools to assist you.
Instructions:
The maze game is a small system for building a maze in a computer game; this system uses
the abstract factory pattern, as described by Gamma et al. A maze is defined as a set of
rooms; a room knows its neighbors, such as a wall, or a door to another room. The class
MapSite is the common abstract class for all the components of the maze. There are two
variations of the maze game supported by the abstract factory pattern: a red maze game
and a blue maze game.
The lab has two parts to focus on the two models of testing.
Stage 1: Black Box Testing
Source code for the part of the system that controls moving around the maze has not been
given to you. Design black box tests to ensure that the system functionality is reasonable
(e.g. one cannot move through a wall). Your interface to this functionality is through the
MazeViewer.move(Maze maze, Direction dir) method. This method instructs the person in
the maze to move one location in the specified direction. If the move is valid, the person
will make the move. If the move is invalid, nothing will happen.
It is important to remember that when loading a maze from a file, the person always starts
in room zero. You may find the Maze.getCurrentRoom() method to be helpful; it returns a
reference to the room the person is currently in.
In a text file called blackbox.txt, describe any techniques you used in designing the tests and
why the number of tests you designed is sufficient. Please also record any bugs found in
blackbox.txt.
Stage 2: White Box Testing
For the parts of the system that you have been given source code to, design a set of white
box tests for maximum code coverage. Use JUnit and EMMA to help you. Is it possible for
you to achieve 100% coverage? Explain.
Calculate the cyclomatic complexity for all methods in the SimpleMazeGame class. How did
you come up with these numbers? Please describe in a text file called whitebox.txt
The SimpleMazeGame class constructs a maze based on a description from a file (see
Appendix A for file format). Unit test this method and record any bugs found in writebox.txt
