Getting_Started_100_Calculator.cs

using System;
using CommandDotNet.TestTools;
using CommandDotNet.TestTools.Scenarios;
using NUnit.Framework;

namespace CommandDotNet.DocExamples.GettingStarted;

[TestFixture]
public class Getting_Started_100_Calculator
{
    // begin-snippet: getting-started-100-calculator
    public class Program
    {
        // this is the entry point of your application
        static int Main(string[] args)
        {
            // AppRunner<T> where T is the class defining your commands
            // You can use Program or create commands in another class
            return new AppRunner<Program>().Run(args);
        }

        // Add command with two positional arguments
        public void Add(int x, int y) => Console.WriteLine(x + y);

        // Subtract command with two positional arguments
        public void Subtract(int x, int y) => Console.WriteLine(x - y);
    }
    // end-snippet

    public static BashSnippet Help = new("getting-started-100-calculator-help",
        new AppRunner<Program>(),
        "dotnet calculator.dll", "--help", 0,
        @"Usage: {0} [command]

Commands:

  Add
  Subtract

Use ""{0} [command] --help"" for more information about a command.");

    public static BashSnippet Help_Add = new("getting-started-100-calculator-add-help",
        new AppRunner<Program>(),
        "dotnet calculator.dll", "Add -h", 0,
        @"Usage: {0} Add <x> <y>

Arguments:

  x  <NUMBER>

  y  <NUMBER>");

    public static BashSnippet Add = new("getting-started-100-calculator-add",
        new AppRunner<Program>().InterceptSystemConsoleWrites(),
        "dotnet calculator.dll", "Add 40 20", 0,
        @"60");


    public static BashSnippet Add_Invalid = new("getting-started-100-calculator-add-invalid",
        new AppRunner<Program>(),
        "dotnet calculator.dll", "Add a 20", 2,
        @"'a' is not a valid Number");

    // Test commands not testing via BashSnippet
    [Test]
    public void Subtract_works() =>
        new AppRunner<Program>()
            .InterceptSystemConsoleWrites()
            .Verify(new Scenario
            {
                When = { Args = "Subtract 40 20" },
                Then = { Output = "20" }
            });
}