public void MarshalTheValueToAPointer()
{
var lpStubStructure = IntPtr.Zero;
var target = new MarshallingService();
try
{
var sizeOfStubStructure = Marshal.SizeOf <StubStructure>();
var value = new StubStructure
{
Field1 = 1,
Field2 = 2,
Field3 = 3,
Field4 = "4"
};
lpStubStructure = Marshal.AllocHGlobal(sizeOfStubStructure);
target.StructureToPtr(value, lpStubStructure);
var result = Marshal.PtrToStructure <StubStructure>(lpStubStructure);
Assert.AreEqual(1, result.Field1);
Assert.AreEqual(2, result.Field2);
Assert.AreEqual(3, result.Field3);
Assert.AreEqual("4", result.Field4);
}
finally
{
if (lpStubStructure != IntPtr.Zero)
{
Marshal.FreeHGlobal(lpStubStructure);
}
}
}
public void ThrowAnExceptionWhenThePtrIsZero()
{
var target = new MarshallingService();
Assert.Throws <ArgumentNullException>(() => target.StructureToPtr(new StubStructure(), IntPtr.Zero));
}