This project implements a basic Command Line Interpreter (CLI) in Java, mimicking the functionality of a Unix/Linux shell. It supports system commands like pwd, cd, ls, and more, as well as internal commands such as exit and help. Additionally, the project includes JUnit test cases to ensure the reliability of the implemented commands.

1. Command Execution:

   • Supported commands: pwd, cd, ls, ls -a, ls -r, mkdir, rmdir, touch, mv, rm, cat, >, >>, |
   • Handles both valid and invalid inputs gracefully.

2. Internal Commands:

   • exit: Terminates the CLI.
   • help: Displays a list of available commands and their usage.

3. JUnit Testing:

   • Automated test cases to verify the functionality of each command.
   • Ensures code reliability and consistency across updates.
   • Tests for edge cases, such as invalid paths, improper parameters, and other errors.

• Programming Language: Java
• Testing Framework: JUnit
• Development Tools: IntelliJ IDEA, Eclipse, or any Java IDE
• Version Control System: Git and GitHub

1. Command Parsing and Execution:

   • The CLI interprets user input, identifies valid commands, and executes them using Java-based logic.
   • Implements commands like mv with multi-functional capabilities (e.g., moving and renaming files).

2. Error Handling:

   • Displays meaningful error messages for invalid commands, parameters, or paths without crashing.

3. Automated Testing with JUnit:

   • Utilizes JUnit annotations like @Test, @Before, and @After to structure test cases.
   • Employs assertions (assertEquals, assertTrue, etc.) to verify outcomes against expected behavior.

4. Object-Oriented Programming:

   • Modular design for command functionalities and test cases.
   • Uses Java's standard libraries and predefined classes for file and directory management.