Reflection under Unit Test

I get null object when I am trying to reflect class's static method under unit test. But it ok under editor's Play Mode. My platform settings: Android, IL2CPP and .Net4.xHere is my class:

Code (CSharp):

1.  
2. namespace Core.Easing
3. {
4. public class EasingFunction
5. {
6.         public static float EaseNone(float t, float b, float c, float d)
7.         {
8.             return c * t / d + b;
9.         }
10. }
11. }
12.  

and here is my reflection method:

Code (CSharp):

1.        
2. public Func<float, float, float, float, float> Build()
3.         {
4.             var namespaceName = "Core.Easing";
5.             var className = "EasingFunction";
6.             var easeMethodName = "EaseNone";
7.  
8.             var implType = Assembly.GetExecutingAssembly().GetType(namespaceName + "." + className);
9.             //var implType = Type.GetType(namespaceName + "." + className);//Also not working
10.             var implMethod = implType.GetMethod(easeMethodName, BindingFlags.Public | BindingFlags.Static);
11.             var res = Delegate.CreateDelegate(typeof(Func<float, float, float, float, float>), implMethod);
12.             return (Func<float, float, float, float, float>)res.Clone();
13.         }
14.  

So, Each class has its own asmdef file and these are included in the unit test. I looked at the constraints from Unity's documentation but couldn't find an answer.

 

One of reason I could think about is Unity stript out EasingFunction class when build for il2cpp. you could try to add Preserve attribute to EasingFunction.

 

Thank you for answer but not working. I added "[assembly: Preserve]" attribute on namespace level (Core.Easing) but it didn't work. I got same error.

 at (wrapper managed-to-native) System.Reflection.MonoMethod.InternalInvoke(System.Reflection.MonoMethod,object,object[],System.Exception&)

  at System.Reflection.MonoMethod.Invoke (System.Object obj, System.Reflection.BindingFlags invokeAttr, System.Reflection.Binder binder, System.Object[] parameters, System.Globalization.CultureInfo culture) [0x00032] in <695d1cc93cca45069c528c15c9fdd749>:0