Terminal.Gui/UnitTests/Application/SynchronizatonContextTests.cs

// Alias Console to MockConsole so we don't accidentally use Console

namespace Terminal.Gui.ApplicationTests;

public class SyncrhonizationContextTests
{
    [Fact]
    [AutoInitShutdown]
    public void SynchronizationContext_CreateCopy ()
    {
        SynchronizationContext context = SynchronizationContext.Current;
        Assert.NotNull (context);

        SynchronizationContext contextCopy = context.CreateCopy ();
        Assert.NotNull (contextCopy);

        Assert.NotEqual (context, contextCopy);
    }

    [Fact]
    [AutoInitShutdown]
    public void SynchronizationContext_Post ()
    {
        SynchronizationContext context = SynchronizationContext.Current;

        var success = false;

        Task.Run (
                  () =>
                  {
                      Thread.Sleep (1_000);

                      // non blocking
                      context.Post (
                                    delegate
                                    {
                                        success = true;

                                        // then tell the application to quit
                                        Application.Invoke (() => Application.RequestStop ());
                                    },
                                    null
                                   );
                      Assert.False (success);
                  }
                 );

        // blocks here until the RequestStop is processed at the end of the test
        Application.Run ().Dispose ();
        Assert.True (success);
    }

    [Fact]
    [AutoInitShutdown]
    public void SynchronizationContext_Send ()
    {
        SynchronizationContext context = SynchronizationContext.Current;

        var success = false;

        Task.Run (
                  () =>
                  {
                      Thread.Sleep (1_000);

                      // blocking
                      context.Send (
                                    delegate
                                    {
                                        success = true;

                                        // then tell the application to quit
                                        Application.Invoke (() => Application.RequestStop ());
                                    },
                                    null
                                   );
                      Assert.True (success);
                  }
                 );

        // blocks here until the RequestStop is processed at the end of the test
        Application.Run ().Dispose ();
        Assert.True (success);
    }
}