protected object AttemptMethodCall(MethodInfo adaptee, MethodInfo candidate, params object[] args)
{
var proxyModule = ProxyModule.Default;
var name = "MethodCaller_" + adaptee.Name + "_" + candidate.Name;
var tb = proxyModule.ModuleBuilder.DefineType(name);
var cb = tb.DefineConstructor(MethodAttributes.Public, CallingConventions.Standard, new[] { typeof(StandardMethodBindingTests) });
var field = tb.DefineField("_t", typeof(StandardMethodBindingTests), FieldAttributes.Private);
GenerateCtor(cb.GetILGenerator(), field);
var mb = tb.DefineMethod("Call", MethodAttributes.Public, adaptee.ReturnType,
adaptee.GetParameters().Select(p => p.ParameterType).ToArray());
var gen = mb.GetILGenerator();
gen.Emit(OpCodes.Ldarg_0);
gen.Emit(OpCodes.Ldfld, field);
// Use binding to generate the body of this method for testing
var binding = StandardMethodBinding.TryBind(adaptee, candidate);
Assert.That(binding.Bindable);
Assert.That(binding.Score, Is.GreaterThan(DuckMethodBindingOption.NotBindable.Score));
binding.GenerateCall(proxyModule, gen);
gen.Emit(OpCodes.Ret);
#if FEATURE_LEGACYREFLECTION
var mcType = tb.CreateType();
#else
var mcType = tb.CreateTypeInfo().AsType();
#endif
object mc = Activator.CreateInstance(mcType, this);
var callMethod = mcType.GetMethod("Call");
return(callMethod.Invoke(mc, args));
}
public void TryBindReturnsNullIfArgNotBindable()
{
// Single arg does not match
Assert.That(StandardMethodBinding.TryBind(GetMethod("VoidMethodOneArgA"), GetMethod("VoidMethodOneArgC")), Is.Null);
// Both args do not match
Assert.That(StandardMethodBinding.TryBind(GetMethod("VoidMethodTwoArgA"), GetMethod("VoidMethodTwoArgC")), Is.Null);
// First arg matches, second does not
Assert.That(StandardMethodBinding.TryBind(GetMethod("VoidMethodTwoArgA"), GetMethod("VoidMethodTwoArgD")), Is.Null);
// Second arg matches, first does not
Assert.That(StandardMethodBinding.TryBind(GetMethod("VoidMethodTwoArgA"), GetMethod("VoidMethodTwoArgE")), Is.Null);
}
public void TryBindReturnsNullIfRetValNotBindable()
{
Assert.That(StandardMethodBinding.TryBind(GetMethod("VoidMethodZeroArgA"), GetMethod("IntMethodZeroArgA")), Is.Null);
Assert.That(StandardMethodBinding.TryBind(GetMethod("IntMethodZeroArgA"), GetMethod("ObjectMethodZeroArgA")), Is.Null);
}
public void TryBindReturnsNullIfArgCountDiffers()
{
Assert.That(StandardMethodBinding.TryBind(GetMethod("VoidMethodZeroArgA"), GetMethod("VoidMethodOneArgA")), Is.Null);
Assert.That(StandardMethodBinding.TryBind(GetMethod("VoidMethodOneArgA"), GetMethod("VoidMethodTwoArgA")), Is.Null);
}