cse15l-lab-reports

Lab Report 5: Debugging & Reflection

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Part 1: Debugging Scenario

1. Student Post:

• Environment: I am using a Windows 11 Computer and editing my code with VSCode and running it with bash script through the terminal
• Symptom: When I try running grade.sh (for the grader project in lab 6) through the terminal, this is what I get: I am aware that the failure-inducing input is the file path: grading-area/TestListExamples. I want to run TestListExamples in the grading-area directory that it has been copied to but it can’t seem to find and run the class. When I try getting rid of grading-area/, it also produces a symptom where it can’t run the ListExamples class that should have been copid to grading-area.

• Here are the commands I’m running and the file structure:

  

  

  My working directory is the /list-examples-grader directory and the command I use to run the bash script is bash grade.sh https://github.com/ucsd-cse15l-f22/list-methods-lab3

2. TA Response:

You can’t run the TestListExamples class from your current working directory list-examples-grader. If you want to run and compile the TestListExamples java file, you will need to change directory to grading-area before running and compiling them. Before that, since you want to run JUnit tests in the grading-area directory, you may want to also copy the lib directory into grading-area.

3. Student Response:

Ok I tried making those changes, and here is the output I got (which is the correct and expected output):

So the bug was that the script was attempting to run a class by the name of “grading-area/TestListExamples” rather than “TestExamples” as I would want. Since the desired class was in another directory, I needed to change the directory before running and compiling the tests. Also I needed to make sure that I recursively copied the lib folder so that the JUnit tests would work.

4. Setup Info:

• File & Directory Structure:

  

• Contents before bug fix:

  grade.sh before bug fix:

  

  ListExamples.java:

  

  TestListExamples.java:

  

• Commands: bash grade.sh https://github.com/ucsd-cse15l-f22/list-methods-lab3 which ran the bash script grade.sh with the github repo as an argument
• Bug Fix: To fix the bug, just add cd grading-area before running and compiling the JUnit tests with the class name changed from grading-area/TestListExamples to TestListExamples, before chaning to the grading-area directory, recursively copy the lib folder with cp -r lib grading-area

grade.sh after the bug fix:

Part 2: Reflection

In the second half of the quarter, something that I learned from my lab experience that I didn’t know before was how the output and the error output from files and commands could be redirected and used through bash script. I found this to be particularly interesting in week6s lab where we were able to learn a little about how graders can use bash script to grade coding submissions. After learning about this, I am interested in how more combinations ofcommands, bash script, code, and files can work and interact with each other. Another one of the most useful things that I have learned in this second half of the quarter is the use of shortcuts, whether it is the ssh key to quickly remotely access a server or the command and vim shortcuts, I found these to be very useful in working in the command line.