Hello,
I am currently trying to add some visual tests to my game. I’ve managed to write working tests when running independently, but I get an exception when I run all the tests together.
Here’s a minimal example that exhibits the problem :
[TestFixture]
[Apartment(ApartmentState.STA)]
public class SimplestGame
{
TimeSpan timeLimit = new TimeSpan(0, 0, 0, 0, 100);
[Test]
public void RunSimplestGame()
{
Console.WriteLine("Starting...");
var game = new DummyGame(timeLimit);
Console.WriteLine("Running...");
game.Run();
Console.WriteLine("Exiting...");
game.Dispose();
}
}
[TestFixture]
[Apartment(ApartmentState.STA)]
public class SimplestGame2
{
TimeSpan timeLimit = new TimeSpan(0, 0, 0, 0, 100);
[Test]
public void RunSimplestGame()
{
Console.WriteLine("Starting...");
var game = new DummyGame(timeLimit);
Console.WriteLine("Running...");
game.Run();
Console.WriteLine("Exiting...");
game.Dispose();
}
}
public class DummyGame : Game
{
private readonly GraphicsDeviceManager graphics;
private readonly TimeSpan limit;
private SpriteBatch spriteBatch;
public DummyGame(TimeSpan limit)
{
graphics = new GraphicsDeviceManager(this);
this.limit = limit;
}
protected override void Initialize()
{
base.Initialize();
}
protected override void LoadContent()
{
Content.RootDirectory = "Content";
spriteBatch = new SpriteBatch(GraphicsDevice);
}
protected override void UnloadContent()
{
}
protected override void Update(GameTime gameTime)
{
if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed
|| Keyboard.GetState().IsKeyDown(Keys.Escape)
|| Elapsed(gameTime))
{
Exit();
}
base.Update(gameTime);
}
protected override void Draw(GameTime gameTime)
{
GraphicsDevice.Clear(Color.CornflowerBlue);
base.Draw(gameTime);
}
private bool Elapsed(GameTime gameTime)
{
if (gameTime.TotalGameTime > limit)
return true;
return false;
}
}
Both tests (they are identical) run fine if I run them alone, but the second one crashes if I run them together in nunit, with the following error :
One or more errors occurred.
Stack trace:
at System.Threading.Tasks.Task.ThrowIfExceptional (System.Boolean includeTaskCanceledExceptions) [0x00011] in <9bbab8f8a2a246e98480e70b0839fd67>:0
at System.Threading.Tasks.Task1[TResult].GetResultCore (System.Boolean waitCompletionNotification) [0x0002b] in <9bbab8f8a2a246e98480e70b0839fd67>:0 at System.Threading.Tasks.Task1[TResult].get_Result () [0x0000f] in <9bbab8f8a2a246e98480e70b0839fd67>:0
at MonoDevelop.UnitTesting.NUnit.NUnitAssemblyTestSuite.RunUnitTest (MonoDevelop.UnitTesting.UnitTest test, System.String suiteName, System.String pathName, System.String testName, MonoDevelop.UnitTesting.TestContext testContext) [0x00245] in <5a50c7f8fd15492b8f57b877d888bb04>:0
at MonoDevelop.UnitTesting.NUnit.NUnitTestSuite.OnRun (MonoDevelop.UnitTesting.TestContext testContext) [0x00001] in <5a50c7f8fd15492b8f57b877d888bb04>:0
at MonoDevelop.UnitTesting.UnitTest.Run (MonoDevelop.UnitTesting.TestContext testContext) [0x00020] in <14600d39865a4deabab34102d35bdc57>:0
Running the tests in the console gives some more details:
Errors, Failures and Warnings
- Error : /home/…/bin/Debug/MyGame.Tests.dll
System.Runtime.Remoting.RemotingException : Tcp transport error.
----> System.Runtime.Remoting.RemotingException : Connection closed
–RemotingException
Server stack trace:
at System.Runtime.Remoting.Channels.Tcp.TcpMessageIO.ReceiveMessageStatus (System.IO.Stream networkStream, System.Byte[] buffer) [0x00017] in <981d2e773a85450680fa518175a3273b>:0
at System.Runtime.Remoting.Channels.Tcp.TcpClientTransportSink.ProcessMessage (System.Runtime.Remoting.Messaging.IMessage msg, System.Runtime.Remoting.Channels.ITransportHeaders requestHeaders, System.IO.Stream requestStream, System.Runtime.Remoting.Channels.ITransportHeaders& responseHeaders, System.IO.Stream& responseStream) [0x0005e] in <981d2e773a85450680fa518175a3273b>:0
at System.Runtime.Remoting.Channels.BinaryClientFormatterSink.SyncProcessMessage (System.Runtime.Remoting.Messaging.IMessage msg) [0x00066] in <981d2e773a85450680fa518175a3273b>:0
Exception rethrown at [0]:
at (wrapper managed-to-native) System.Object.__icall_wrapper_mono_remoting_wrapper(intptr,intptr)
at (wrapper remoting-invoke) NUnit.Engine.Agents.RemoteTestAgent.Run(NUnit.Engine.ITestEventListener,NUnit.Engine.TestFilter)
at NUnit.Engine.Runners.ProcessRunner.RunTests (NUnit.Engine.ITestEventListener listener, NUnit.Engine.TestFilter filter) [0x00025] in :0
–RemotingException
at System.Runtime.Remoting.Channels.Tcp.TcpMessageIO.StreamRead (System.IO.Stream networkStream, System.Byte[] buffer, System.Int32 count) [0x00011] in <981d2e773a85450680fa518175a3273b>:0
at System.Runtime.Remoting.Channels.Tcp.TcpMessageIO.ReceiveMessageStatus (System.IO.Stream networkStream, System.Byte[] buffer) [0x00000] in <981d2e773a85450680fa518175a3273b>:0
If I comment out the game.dispose() instruction in the RunSimplestGame method, I can run them together without error, so I suspect that something is shared between the two tests and disposed before the second one is finished.
Am I missing something? Any idea of what needs to be done to ensure that both tests are effectively independent?
Thanks!
What version of MonoGame does the bug occur on:
MonoGame 3.7.0.1644
What operating system are you using:
Ubuntu 18.04
What MonoGame platform are you using:
DesktopGL