public async Task RunAsync_Cancellation_Test()
{
// Arrange
using var console = new VirtualConsole();
var application = new CliApplicationBuilder()
.AddCommand(typeof(CancellableCommand))
.UseConsole(console)
.Build();
var commandLineArguments = new[] { "cancel" };
var environmentVariables = new Dictionary <string, string>();
// Act
console.CancelAfter(TimeSpan.FromSeconds(0.2));
var exitCode = await application.RunAsync(commandLineArguments, environmentVariables);
var stdOut = console.ReadOutputString().Trim();
var stdErr = console.ReadErrorString().Trim();
// Assert
exitCode.Should().NotBe(0);
stdOut.Should().BeNullOrWhiteSpace();
stdErr.Should().NotBeNullOrWhiteSpace();
Console.WriteLine(stdErr);
}