public void should_destroy_all_systems_and_handlers_when_disposed()
{
var fakeSetupSystemHandler1 = Substitute.For <IConventionalSystemHandler>();
var fakeSetupSystemHandler2 = Substitute.For <IConventionalSystemHandler>();
var fakeSystem1 = Substitute.For <ISetupSystem>();
var fakeSystem2 = Substitute.For <ISetupSystem>();
var fakeSystem3 = Substitute.For <ISetupSystem>();
fakeSetupSystemHandler1.CanHandleSystem(Arg.Any <ISystem>()).Returns(true);
fakeSetupSystemHandler2.CanHandleSystem(Arg.Any <ISystem>()).Returns(true);
var systemExecutor = new SystemExecutor(new[] { fakeSetupSystemHandler1, fakeSetupSystemHandler2 });
systemExecutor._systems.Add(fakeSystem1);
systemExecutor._systems.Add(fakeSystem2);
systemExecutor._systems.Add(fakeSystem3);
systemExecutor.Dispose();
fakeSetupSystemHandler1.Received(3).DestroySystem(Arg.Any <ISystem>());
fakeSetupSystemHandler2.Received(3).DestroySystem(Arg.Any <ISystem>());
fakeSetupSystemHandler1.Received(1).Dispose();
fakeSetupSystemHandler2.Received(1).Dispose();
Assert.Empty(systemExecutor._systems);
}