A6: Unit Testing

The goal of this assignment is to reinforce the importance of unit testing in Java using JUnit. You will design and implement a suite of unit tests for the train simulation we wrote A4: Chugging Along. Your A4 solution consisted of the following classes:

Car: Represents a train car. Engine: Represents the train’s engine. Passenger: Represents passengers who board and leave the train. Train: Represents an entire train with one or more cars.

In this assignment, you will write at least 10 unit tests that verify the functionality and correctness of each of these classes.

Step 1: Getting Started

• Fork the the repository for CSC120-A6, and clone it to your local machine.
• Add your Car.java, Engine.java, Passenger.java, and Train.java to your forked repository and commit your changes.
• Analyze the functionality of the classes contained in those files.
• Enable Java tests using the jUnit testing framework.

Step 2: Writing Unit Tests

Write your jUnit tests inside TrainTest.java, using assertions to validate expected outputs. Below you'll find a list of key methods in each class that should be tested:

Engine Class (2 tests)

• Verify that the Engine constructor initializes correctly with the given FuelType and fuel level.
• Test the go() method to ensure that fuel consumption reduces the fuel level correctly.

Car Class (2 tests)

• Ensure that adding a Passenger increases the passenger count.
• Check that removing a Passenger decreases the count and doesn't go negative.

Passenger Class (2 tests)

• Test that a Passenger can successfully board a Car.
• Ensure that a Passenger cannot board a full Car.

Train Class (4 tests)

• Verify that a Train initializes correctly with a given number of Cars.
• Ensure the Train’s total Passenger count updates as Passengers board and leave.
• Check that the getCar(int i) method returns the expected Car.
• Test the printManifest() method to ensure it iterates through the Trains Cars correctly.

These are only a starting point; you are welcome to write additional tests if you would like.

What to Submit

As before, all the files necessary for this assignment are contained within this repository. When you submit, please remember to include:

• all files necessary to compile your program
• reflection.md containing your reflections and notes
• rubric.md where you document which elements of the assignment you have attempted and/or completed