OldPhonePadCodingChallenge

This project implements a method to simulate typing on an old mobile phone keypad.

Overview

The 'OldPhonePadMethod' takes a string input and converts it to the corresponding text as typed on a classic phone keypad. This method simulates the behavior of typing messages on old mobile phones, where each number key corresponds to multiple letters.

Method

OldPhonePadMethod

The OldPhonePadMethod processes a string of key presses and converts it into a readable message according to the following rules:

• Digits from 1 to 9 represent letters on a classic phone keypad.
• * acts as a backspace key.
• 0 acts as a space key.
• # represents the send key and ends the input.

Example Usage

using System:
public class OldPhonePad
{
    public static void Main(string[] args)
    {
        Console.WriteLine("Test case 1 \n");
        string input1 = "4433555 555666096667775553#";
        string output1 = OldPhonePadMethod(input1);
        Console.WriteLine($"Input: {input1} => Output: {output1}\n");
    }
}

The Result

The result of this code snippet should give you the output "HELLO WORLD". The program detects spaces in your input and resets the lastChar to avoid misinterpretation

How To Run

Prerequisites

• Visual Studio 2019 or later
• .NET Core SDK 3.1 or later (optional if you export the program to .exe)

Steps to run

1. Clone Repo

git clone https://github.com/GhostDevelopment69/OldPhonePadCodingChallenge.git
cd OldPhonePadCodingChallenge

2. Open the Solution

• Open 'OldPhonePadCodingChallenge.sln' in Visual Studio

3. Build the Solution

• Go to 'Build > Build Solution'

4. Run the Project

• Press 'F5' or go to 'Debug > Start Debugging'
• Alternatively, Run without Debugging

Modifying Input

To test different input strings, modfiy the test cases in the 'Main' method.

public static void Main(string[] args)
{
    //Test case 1
    Console.WriteLine("Test case 1 \n");
    string input1 = "4433555 555666096667775553#";
    string output1 = OldPhonePadMethod(input1);
    Console.WriteLine($"Input: {input1} => Output: {output1}\n");

    //Test case 2
    Console.WriteLine("Test case 2 \n");
    string input2 = "4433555 555344488833777 7777#";
    string output2 = OldPhonePadMethod(input2);
    Console.WriteLine($"Input: {input2} => Output: {output2}\n");

    //Test case 3
    Console.WriteLine("Test case 3 \n");
    string input3 = "8 88777444666 * 664#";
    string output3 = OldPhonePadMethod(input3);
    Console.WriteLine($"Input: {input3} => Output: {output3} \n");

    //Test case 4
    Console.WriteLine("Test case 4 \n");
    string input4 = "55544466887777 083322244 084447 7777#";
    string output4 = OldPhonePadMethod(input4);
    Console.WriteLine($"Input: {input4} => Output: {output4} \n");
}

Unit Tests

This project includes unit tess to verify the functionality of the OldPhonePadMethod. The tests are written in xUnit and can be found in the OldPhonePadUnitTests project.

You can change the unit tests or add any to your hearts desire.

Prerequisites to run the Unit Tests

These prerequisites can be obtained from Windows NuGet by Right-clicking on OldPhonePadUnitTests and selecting Manage NuGet Packages.

• xunit
• xunit.runner.visualstudio
• Microsoft.NET.Test.Sdk

Running the Unit Tests

1. Build the Solution:
   • In Visual Studio, go to Build > Build Solution or press Ctrl+Shift+B.
2. Run the Tests:
   • In Visual Studio, go to Test > Run All Tests or press Ctrl+R, A.

License

This project is licensed under the MIT License. See "LICENSE.txt" for more information.

Contributing

Contributions are welcome! Please fork the repo and open a pull request to add functionality or to fix bugs as necessary.