Java Developer Needed to Write & Fix Test Cases for Small Console Project

Job Description

Project Overview

I have a small Java calculator console application and need help completing and fixing its test cases.

Some tests are already written, and I also have notes describing:

• Which test cases are missing
• What changes were recently made to the program

Your task will be to complete the remaining tests, update the existing ones where necessary, and ensure the application behaves correctly.

Application Description

The program is a simple calculator that:

• Accepts two numbers and an operator from the command line
• Performs the calculation
• Displays helpful error messages when the input is incorrect

The error messages should clearly explain:

• What the issue is
• Where the issue occurred in the input

What Needs to Be Done

• Review the existing test cases
• Add missing tests
• Update tests based on recent code changes
• Run all tests and ensure they pass
• Verify handling of:
  • Valid inputs
  • Invalid numbers
  • Invalid operators
  • Missing arguments
  • Incorrect formats

Requirements

• Experience with Java
• Experience writing unit tests (JUnit preferred)
• Ability to quickly understand small projects
• Attention to detail when testing edge cases

Project Size

This is a very small project, and the task should be quick for someone experienced with Java testing.

Goal

By the end of the task:

Input validation is fully covered

All required tests are implemented

Existing tests are updated

Everything runs successfully