CSCI 2134 - The Ticket to Ride Problem - Inherited Some Buggy Code for Computing Shortest Path - IT Assignment Help

Assignment Task

Objectives 
• Practice developing effective unit tests 
• Practice implementing unit tests with JUnit 

Background 
You have inherited some buggy code for computing shortest path solutions to the board game  Ticket to Ride. Your boss fired their previous developer because the former developer did not  do any testing. Your boss has hired you to write a comprehensive set of tests for part of the  codebase. For now, she just wants you to create the test suite. 
Given a game board of rail segments and a list of routes (pairs of cities), the code is supposed to  compute the total cost of building a network between the given routes, assuming that the  shortest distance for each route is chosen. This can be computed by computing shortest paths  for each route using Dijkstra’s shortest path algorithm. 
You will be provided with a partial codebase for distance computation, a specification, a starter  JUnit5 test class, and a list of classes for which you are to create unit tests. Your job is to create  the test suite and identify the bugs. You will fix the bugs in a later assignment so do not spend  time fixing them now.
Note that the code you are provided does not have a main method and does not have the  method implementing Dijkstra’s shortest path algorithm. These will be provided in a later  assignment. You only need to write unit tests, not code for the Ticket to Ride problem in this  assignment. 

Task 
1. Read the specification of what the code is supposed to do in  docs/specification.pdf 
2. Create a set of unit tests using JUnit5 for the following classes: 
• City.java 
• Link.java 
• CityComparator.java 
3. Use a separate test class for each of the above target classes. Some sample empty tests  and real tests have been provided. For each test class  
a. You can decide if you want to use white-box testing, black-box testing, or grey-box  testing. 
b. Create as many tests for each method of each class as needed. Recall from class  that we discussed ways of determining how many tests we would need. By  analysing the code (white-box testing) or the specification (black-box testing).

c. Each test should provide an appropriate message if it fails. 
d. Use good formatting and documentation in your tests, just like for any source code. 4. All the test classes should compile and be runnable in IntelliJ. If your test classes do not  compile, you will receive 0 on the assignment. 
5. Record all detected errors in a file called errors.txt in the docs directory. You do not  need to debug, just record the method and class that failed. Each error should have the  following information:  
a. Class name 
b. Method name  
c. Test name that caught the error 
d. Message that the test method generated 
This information will be used to assess the number of errors found by your tests. An  example is provided. 
6. Commit and push back to the remote repository. As the primary branch is called “main” you  will need to use the command “git push origin main”. Remember to check that all your files  have been submitted using the web interface to git. 

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