private void SetReturnDelegate(Delegate value)
{
if (value != null)
{
ValidateReturnDelegate(value);
}
this.valueDel = value;
this.returnValueKind = ReturnValueKind.Explicit;
}
private void SetReturnDelegate(Delegate value)
{
if (value == null)
{
this.valueDel = (Func <TResult>)(() => default(TResult));
}
else
{
this.valueDel = value;
}
this.returnValueKind = ReturnValueKind.Explicit;
}
private void SetReturnDelegate(Delegate value)
{
if (value == null)
{
// A `null` reference (instead of a valid delegate) is interpreted as the actual return value.
// This is necessary because the compiler might have picked the unexpected overload for calls like `Returns(null)`,
// or the user might have picked an overload like `Returns<T>(null)`,
// and instead of in `Returns(TResult)`, we ended up in `Returns(Delegate)` or `Returns(Func)`,
// which likely isn't what the user intended.
// So here we do what we would've done in `Returns(TResult)`:
this.valueDel = (Func <TResult>)(() => default(TResult));
}
else
{
ValidateReturnDelegate(value);
this.valueDel = value;
}
this.returnValueKind = ReturnValueKind.Explicit;
}
public override void SetCallBaseResponse()
{
this.returnValueKind = ReturnValueKind.CallBase;
}
public void SetReturnsResponse(Delegate value)
{
if (value == null)
{
// A `null` reference (instead of a valid delegate) is interpreted as the actual return value.
// This is necessary because the compiler might have picked the unexpected overload for calls
// like `Returns(null)`, or the user might have picked an overload like `Returns<T>(null)`,
// and instead of in `Returns(TResult)`, we ended up in `Returns(Delegate)` or `Returns(Func)`,
// which likely isn't what the user intended.
// So here we do what we would've done in `Returns(TResult)`:
this.valueDel = new Func <object>(() => this.ReturnType.GetDefaultValue());
}
else if (this.ReturnType == typeof(Delegate))
{
// If `TResult` is `Delegate`, that is someone is setting up the return value of a method
// that returns a `Delegate`, then we have arrived here because C# picked the wrong overload:
// We don't want to invoke the passed delegate to get a return value; the passed delegate
// already is the return value.
this.valueDel = new Func <Delegate>(() => value);
}
else
{
ValidateCallback(value);
this.valueDel = value;
}
this.returnValueKind = ReturnValueKind.Explicit;
void ValidateCallback(Delegate callback)
{
var callbackMethod = callback.GetMethodInfo();
// validate number of parameters:
var numberOfActualParameters = callbackMethod.GetParameters().Length;
if (callbackMethod.IsStatic)
{
if (callbackMethod.IsExtensionMethod() || callback.Target != null)
{
numberOfActualParameters--;
}
}
if (numberOfActualParameters > 0)
{
var numberOfExpectedParameters = this.Method.GetParameters().Length;
if (numberOfActualParameters != numberOfExpectedParameters)
{
throw new ArgumentException(
string.Format(
CultureInfo.CurrentCulture,
Resources.InvalidCallbackParameterCountMismatch,
numberOfExpectedParameters,
numberOfActualParameters));
}
}
// validate return type:
var actualReturnType = callbackMethod.ReturnType;
if (actualReturnType == typeof(void))
{
throw new ArgumentException(Resources.InvalidReturnsCallbackNotADelegateWithReturnType);
}
var expectedReturnType = this.Method.ReturnType;
if (!expectedReturnType.IsAssignableFrom(actualReturnType))
{
throw new ArgumentException(
string.Format(
CultureInfo.CurrentCulture,
Resources.InvalidCallbackReturnTypeMismatch,
expectedReturnType,
actualReturnType));
}
}
}
public IReturnsResult <TMock> CallBase()
{
this.returnValueKind = ReturnValueKind.CallBase;
return(this);
}