Fall 2025 — Assignment 2

• Practice static analysis
• Apply RIPR model to design tests
• Understand testability, controllability, and observability
• Recognize characteristics of good test cases
• Practice test automation framework — JUnit

All homeworks are due before class on the due date. All homework assignments must reflect your own understanding of the topic and be communicated in your own words. You may use one of the collaborative options. You may also request help and advice from your classmates on Piazza. Any help not allowed by that policy will be an honor violation.

Early-submission bonus points

Purpose: To encourage students to start working on the homework assignments early and recognize students who are actively engaged in the content

• 4% of the points you earn (from the assignment) if you submit your assignment at least 48 hours early (submitted by 20-September-2025 11am EST).
• 2% of the points you earn (from the assignment) if you submit your assignment at least 24 hours early (submitted after 20-September-2025 11am EST, by 21-September-2025 11am EST).

Note: The final submission timestamp shown on Gradescope will be used.

[Total: 20 points]

Part 1: JUnit tests for BoundedQueue (6 points)

Part 2: JUnit Data-Driven Tests for Cal (4 points)

Part 3: Analyze and design tests using RIPR model (10 points)

public class PrimeNumbers implements Iterable<Integer>
{
   private List<Integer> primes = new ArrayList<Integer>();
   public void computePrimes(int n)
   {
      int count = 1;        // count of primes
      int number = 2;       // number tested for primeness
      boolean isPrime;      // is this number a prime

      while (count <= n)
      {
         isPrime = true;
         for (int divisor = 2; divisor <= number / 2; divisor++)
         {
            if (number % divisor == 0)
            {
               isPrime = false;
               break;      // for loop
            }
         }
         if (isPrime && (number % 10 != 9))        // FAULT
         {
            primes.add(number);
            count++; 
         }
         number++; 
      }
   }
   
   @Override public Iterator<Integer> iterator()
   {
      return primes.iterator();
   }
    
   @Override public String toString()
   {
      return primes.toString();
   }
}  

What to submit:

1. Part 1:
   • Your JUnit test file (.java). Do not submit .class file We will download and run your JUnit tests.
     • (-6 points) if your JUnit test file (.java) is missing or inaccessible, does not open, does not compile, or does not run. Thus, be sure to verify that your JUnit .java file is accessible, compiles, and runs.
   • A brief report including evidence that your JUnit tests ran, the results of running your tests, and a discussion of any that failed (The first two may be screenshots).
     • (-1 point) if no evidence showing the run and the results is provided
2. Part 2:
   • Your JUnit test file (.java). Do not submit .class file We will download and run your JUnit tests.
     • (-4 points) if your JUnit test file (.java) is missing or inaccessible, does not open, does not compile, or does not run. Thus, be sure to verify that your JUnit .java file is accessible, compiles, and runs.
   • A brief report including evidence that your JUnit tests ran, the results of running your tests, and a discussion of any that failed (The first two may be screenshots).
     • (-1 point) if no evidence showing the run and the results is provided
3. Part 3:
   • Written solutions to the questions
4. If you collaborated, submit a brief collaboration summary: all partner names (refer to the collaborative options) and a summary of what each contributed.

(  -5 points) for 24 hours late (submitted after 22-September 11am EST, by 23-September 11am EST)
(-10 points) for 48 hours late (submitted after 23-September 11am EST, by 24-September 11am EST)

(-2 points) for submitting a Word document or handwriting, or a write-up that is not a typed PDF file.

Submission

1. Your report as a PDF file. Only typed PDF—No handwriting.  No hand-drawing.  No Word document.
2. Your JUnit test files (.java)
   • JUnit test file for BoundedQueue.java
   • JUnit test file for Cal.java

Log in to Canvas, then upload your report as a PDF to Assignment2 on Gradescope. Make sure you connect your partner to your group on Gradescope so that everyone receives credit.

Each team submits only one copy.

Making your submission available to instructor and course staff is your responsibility; if we cannot access or open your file, you will not get credit. Be sure to test access to your file before the due date.

Copyright © 2025 Upsorn Praphamontripong
Released under the CC-BY-NC-SA 4.0 license.
Last updated 2025-09-14 19:24

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