spectreconsole-examples/examples/Cli/Testing/ConsoleTests.cs

using Spectre.Console;
using Spectre.Console.Testing;

namespace Testing;

[TestClass]
public class ConsoleTests
{
    [TestMethod]
    public void Should_Render_Panel()
    {
        // Given
        var console = new TestConsole();

        // When
        console.Write(new Panel(new Text("Hello World")));

        // Then
        Assert.AreEqual(console.Output, """"
┌─────────────┐
│ Hello World │
└─────────────┘

"""");
    }

    [TestMethod]
    public void Should_Select_Orange()
    {
        // Given
        var console = new TestConsole();
        console.Input.PushTextWithEnter("Orange");

        // When
        console.Prompt(
            new TextPrompt<string>("Favorite fruit?")
                .AddChoice("Banana")
                .AddChoice("Orange"));

        // Then
        Assert.AreEqual(console.Output, "Favorite fruit? [Banana/Orange]: Orange\n");
    }
}