public void CreateDelegateFromType()
{
Assert.Throws <ArgumentException>(
() => ConstructorInvokerGenerator.CreateDelegate(typeof(IInternalInterface)));
Assert.Throws <ArgumentException>(
() => ConstructorInvokerGenerator.CreateDelegate(typeof(Type)));
Assert.Throws <ArgumentException>(
() => ConstructorInvokerGenerator.CreateDelegate(typeof(InternalClassWithNoParameterlessConstructor)));
var func = ConstructorInvokerGenerator.CreateDelegate(typeof(InternalClass));
Assert.IsInstanceOf <InternalClass>(func());
func = ConstructorInvokerGenerator.CreateDelegate(typeof(InternalStruct));
Assert.IsInstanceOf <InternalStruct>(func());
}
public void CreateDelegateFromContructorInfoForClassThrowsException()
{
var ctor = typeof(InternalClassWithNoParameterlessConstructor)
.GetConstructor(new[] { typeof(int) });
//with argument validation
var func = ConstructorInvokerGenerator.CreateDelegate(ctor);
Assert.Throws <ArgumentNullException>(() => func(null));
Assert.Throws <ArgumentException>(() => func(new object[0]));
Assert.Throws <InvalidCastException>(() => func(new object[] { "1" }));
//without argument validation
func = ConstructorInvokerGenerator.CreateDelegate(ctor, false);
Assert.Throws <NullReferenceException>(() => func(null));
Assert.Throws <IndexOutOfRangeException>(() => func(new object[0]));
}
public void CreateDelegateFromContructorInfoForClass()
{
var ctor = typeof(InternalClass).GetConstructor(Type.EmptyTypes);
var func = ConstructorInvokerGenerator.CreateDelegate(ctor);
Assert.IsInstanceOf <InternalClass>(func(null));
ctor = typeof(InternalClassWithNoParameterlessConstructor)
.GetConstructor(new[] { typeof(int) });
func = ConstructorInvokerGenerator.CreateDelegate(ctor);
Assert.IsInstanceOf <InternalClassWithNoParameterlessConstructor>(func(new object[] { 1 }));
ctor = typeof(InternalClassWithNoParameterlessConstructor)
.GetConstructor(new[] { typeof(int), typeof(string) });
func = ConstructorInvokerGenerator.CreateDelegate(ctor);
Assert.IsInstanceOf <InternalClassWithNoParameterlessConstructor>(func(new object[] { 1, "s" }));
Assert.IsInstanceOf <InternalClassWithNoParameterlessConstructor>(func(new object[] { 1, "s", 123 })); //the third para will be ignored
ctor = typeof(InternalClassWithNoParameterlessConstructor)
.GetConstructor(new[] { typeof(int), typeof(string), typeof(double) });
func = ConstructorInvokerGenerator.CreateDelegate(ctor);
Assert.IsInstanceOf <InternalClassWithNoParameterlessConstructor>(func(new object[] { 1, "s", 0.123 }));
}