public void FormatsTheMessageAsExpected()
{
var buffer = new IntPtr(1);
var api = new Mock <IKernel32>();
api.Setup(o => o.FormatMessage(It.IsAny <int>(), IntPtr.Zero, 6, 0, ref It.Ref <IntPtr> .IsAny, 0, IntPtr.Zero)).Returns(new FormatMessageCallback(
(int dwFlags, IntPtr lpSource, int dwMessageId, int dwLanguageId, ref IntPtr lpBuffer, int nSize, IntPtr arguments) =>
{
Assert.AreEqual(IntPtr.Zero, lpBuffer);
lpBuffer = buffer;
return(1);
}));
var marshaller = new Mock <IMarshaller>();
marshaller.Setup(o => o.PtrToUnicodeString(buffer, 1)).Returns("test");
var target = new Win32FormatMessageService(api.Object, marshaller.Object);
var result = target.FormatMessage(6);
Assert.AreEqual("test", result);
marshaller.Verify(o => o.FreeHGlobalIfNeeded(buffer), Times.Once);
}
public void ThrowsAnExceptionWhenTheErrorCodeIsLessThanZer0()
{
var api = new Mock <IKernel32>();
var marshaller = new Mock <IMarshaller>();
var target = new Win32FormatMessageService(api.Object, marshaller.Object);
Assert.Throws <ArgumentException>(() => target.FormatMessage(-1));
}
public void ThrowsAnExceptionWhenTheResultIsZero()
{
var api = new Mock <IKernel32>();
api.Setup(o => o.FormatMessage(It.IsAny <int>(), IntPtr.Zero, 6, 0, ref It.Ref <IntPtr> .IsAny, 0, IntPtr.Zero)).Returns(0);
var marshaller = new Mock <IMarshaller>();
var target = new Win32FormatMessageService(api.Object, marshaller.Object);
Assert.Throws <Win32Exception>(() => target.FormatMessage(6));
marshaller.Verify(o => o.FreeHGlobalIfNeeded(IntPtr.Zero), Times.Once);
}
