Integrating XUnit with Unity, resolving - assembly:<unknown assembly>

Hi all,

In my enterprise it would be much beneficial if I could integrate Unity with XUnit. I have opened an XUnit .net 4.7.2 project and added to it as a reference the Unity assembled project from the Assembly Definition that I wish to run tests on.

Everything works good until the test encounters some Unity specific funtionality like the UnityWebRequest and the Application.internetReachability functionalities.

I get these exceptions
assembly:<unknown assembly> type:<unknown type> membernull)

No stack trace is given with these exceptions (its weird)

I am using Rider IDE test runner.

I dont know how to solve this problem, what references should I add?

 

I would assume UnityEngine ? Good luck with this. I've never seen anyone stick with unit testing under Unity long enough just because there's so many gotchas to get it all set up properly.

 

I have tried adding UnityEngine dll and all the UnityWebModules. However core Unity Functionalities seem to be missing. What I have decided to do now is to Inject .Net functionalities into my Unity Code so that No Actual Unity Engine functionalities will be used in Testing (Logging, Networking, Time.currentFrame, etc).

I would still really like to know how to invoke UnityEngine functionalities outside a Unity Project. It would be a much more valid test if the Testing would actually perform the real thing.

 

As far as I know it's impossible.
Unity specific functionality depend on Unity runtime. it use a lot of internal calls(don't be confused with P/Invoke) into unity engine.

so probably only available option to perform real things in tests it's run tests under Unity Project.

 

@Unity devs

If its impossible then so be it, we will just have to write a MockUnityEngine

Currently doing a simple test

Code (CSharp):

1. namespace Jellybone.ContractTests
2. {
3.     public class UnitTest1
4.     {
5.         [Fact]
6.         public void Test1()
7.         {
8.             UnityWebRequest rr = new UnityWebRequest("www.google.com");
9.  
10.             Assert.True(rr != null);
11.         }
12.     }
13. }

in XUnit produces the following Error

System.MissingMethodException
assembly:<unknown assembly> type:<unknown type> membernull)
at (wrapper managed-to-native) UnityEngine.Networking.UnityWebRequest.Create()
at UnityEngine.Networking.UnityWebRequest..ctor (System.String url) [0x00008] in /Users/builduser/buildslave/unity/build/Modules/UnityWebRequest/Public/UnityWebRequest.bindings.cs:160
at Jellybone.ContractTests.UnitTest1.Test1 () [0x00007] in /Users/iliag/jellyclienttools/Tests/Jellybone.ContractTests/Jellybone.ContractTests/UnitTest1.cs:14
at (wrapper managed-to-native) System.Reflection.RuntimeMethodInfo.InternalInvoke(System.Reflection.RuntimeMethodInfo,object,object[],System.Exception&)
at System.Reflection.RuntimeMethodInfo.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x0006a] in /Users/builder/jenkins/workspace/build-package-osx-mono/2020-02/external/bockbuild/builds/mono-x64/mcs/class/corlib/System.Reflection/RuntimeMethodInfo.cs:395

I have added as a reference the UnitEngine dll and WebRequestModule. And the XUnit solution is building.

So is it possible or not?