Sprache: C#
Wrapper für den Zugriff auf private Felder und Methoden über dynamic.
Sinnvoll für UnitTests
Beispiel:
[code]
public class TestClass
{
private int _field1 = 0;
private int GetField()
{
return _field1;
}
private void IncField()
{
_field1++;
}
}
static void Main(string[] args)
{
var test = new TestClass();
dynamic priv = new PrivateAccess(test);
int i = priv.GetField();
Console.WriteLine(i);
priv.IncField();
priv._field1++;
i = priv._field1;
Console.WriteLine(i);
Console.ReadLine();
}
[/code]
public class PrivateAccess : DynamicObject
{
private readonly object _nested = null;
public PrivateAccess(object obj)
{
_nested = obj;
}
public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
result = null;
var methods = _nested.GetType().GetMethods(BindingFlags.Instance | BindingFlags.NonPublic);
var method = methods.FirstOrDefault(m => m.Name == binder.Name && m.GetParameters().Count() == binder.CallInfo.ArgumentCount);
if (method == null)
{
return false;
}
result = method.Invoke(_nested, args);
return true;
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
result = null;
var field = _nested.GetType().GetField(binder.Name, BindingFlags.Instance | BindingFlags.NonPublic);
if (field == null)
{
return false;
}
result = field.GetValue(_nested);
return true;
}
public override bool TrySetMember(SetMemberBinder binder, object value)
{
var field = _nested.GetType().GetField(binder.Name, BindingFlags.Instance | BindingFlags.NonPublic);
if (field == null)
{
return false;
}
field.SetValue(_nested, value);
return true;
}
} public class PrivateAccess : DynamicObject
{
private readonly object _nested = null;
public PrivateAccess(object obj)
{
_nested = obj;
}
public override bool TryInvokeMember(InvokeMemberBinder binder, object[] args, out object result)
{
result = null;
var methods = _nested.GetType().GetMethods(BindingFlags.Instance | BindingFlags.NonPublic);
var method = methods.FirstOrDefault(m => m.Name == binder.Name && m.GetParameters().Count() == binder.CallInfo.ArgumentCount);
if (method == null)
{
return false;
}
result = method.Invoke(_nested, args);
return true;
}
public override bool TryGetMember(GetMemberBinder binder, out object result)
{
result = null;
var field = _nested.GetType().GetField(binder.Name, BindingFlags.Instance | BindingFlags.NonPublic);
if (field == null)
{
return false;
}
result = field.GetValue(_nested);
return true;
}
public override bool TrySetMember(SetMemberBinder binder, object value)
{
var field = _nested.GetType().GetField(binder.Name, BindingFlags.Instance | BindingFlags.NonPublic);
if (field == null)
{
return false;
}
field.SetValue(_nested, value);
return true;
}
}
Alte URL:
/snippet/privateaccess/11023