Trimming of TestConsole output by CommandAppTester is configurable

src/Tests/Spectre.Console.Cli.Tests/Unit/Testing/CommandAppTesterTests.cs

@@ -0,0 +1,47 @@
+
+using System;
+
+namespace Spectre.Console.Tests.Unit.Cli.Testing;
+
+public sealed class CommandAppTesterTests
+{
+    private class CommandAppTesterCommand : Command<OptionalArgumentWithDefaultValueSettings>
+    {
+        private readonly IAnsiConsole _console;
+
+        public CommandAppTesterCommand(IAnsiConsole console)
+        {
+            _console = console;
+        }
+
+        public override int Execute(CommandContext context, OptionalArgumentWithDefaultValueSettings settings)
+        {
+            _console.Write(settings.Greeting);
+            return 0;
+        }
+    }
+
+    [Theory]
+    [InlineData(false, " Hello ", " Hello ")]
+    [InlineData(true, " Hello ", "Hello")]
+    [InlineData(false, " Hello \n World ", " Hello \n World ")]
+    [InlineData(true, " Hello \n World ", "Hello\n World")]
+    public void Should_Respect_Trim_Setting(bool trim, string actual, string expected)
+    {
+        // Given
+        var settings = new CommandAppTesterSettings { TrimConsoleOutput = trim };
+
+        var app = new CommandAppTester(settings);
+        app.SetDefaultCommand<CommandAppTesterCommand>();
+        app.Configure(config =>
+        {
+            config.PropagateExceptions();
+        });
+
+        // When
+        var result = app.Run(actual);
+
+        // Then
+        result.Output.ShouldBe(expected);
+    }
+}