public static bool Handle(Invocation invocation, Mock mock)
{
const BindingFlags bindingFlags = BindingFlags.Public | BindingFlags.NonPublic | BindingFlags.Instance | BindingFlags.DeclaredOnly;
var methodName = invocation.Method.Name;
// Special case for event accessors. The following, seemingly random character checks are guards against
// more expensive checks (for the common case where the invoked method is *not* an event accessor).
if (methodName.Length > 4)
{
if (methodName[0] == 'a' && methodName[3] == '_' && invocation.Method.IsEventAddAccessor())
{
var implementingMethod = invocation.Method.GetImplementingMethod(invocation.ProxyType);
var @event = implementingMethod.DeclaringType.GetEvents(bindingFlags).SingleOrDefault(e => e.GetAddMethod(true) == implementingMethod);
if (@event != null)
{
bool doesntHaveEventSetup = !mock.MutableSetups.HasEventSetup;
if (mock.CallBase && !invocation.Method.IsAbstract)
{
if (doesntHaveEventSetup)
{
invocation.ReturnValue = invocation.CallBase();
}
}
else if (invocation.Arguments.Length > 0 && invocation.Arguments[0] is Delegate delegateInstance)
{
mock.EventHandlers.Add(@event, delegateInstance);
}
return(doesntHaveEventSetup);
}
}
else if (methodName[0] == 'r' && methodName.Length > 7 && methodName[6] == '_' && invocation.Method.IsEventRemoveAccessor())
{
var implementingMethod = invocation.Method.GetImplementingMethod(invocation.ProxyType);
var @event = implementingMethod.DeclaringType.GetEvents(bindingFlags).SingleOrDefault(e => e.GetRemoveMethod(true) == implementingMethod);
if (@event != null)
{
bool doesntHaveEventSetup = !mock.MutableSetups.HasEventSetup;
if (mock.CallBase && !invocation.Method.IsAbstract)
{
if (doesntHaveEventSetup)
{
invocation.ReturnValue = invocation.CallBase();
}
}
else if (invocation.Arguments.Length > 0 && invocation.Arguments[0] is Delegate delegateInstance)
{
mock.EventHandlers.Remove(@event, delegateInstance);
}
return(doesntHaveEventSetup);
}
}
}
return(false);
}
