public void StreamWrapperShouldCallIStreamSeekWithValidArgumentsWhenSeekCalled(long offset, SeekOrigin origin)
{
// Arrange
int expectedDwOrigin = 0;
switch (origin)
{
case SeekOrigin.Begin:
expectedDwOrigin = 0;
break;
case SeekOrigin.Current:
expectedDwOrigin = 1;
break;
case SeekOrigin.End:
expectedDwOrigin = 2;
break;
}
var streamMock = new Mock <IStream>();
using (var streamWrapper = new ReadonlyStream(streamMock.Object))
{
// Act
streamWrapper.Seek(offset, origin);
// Assert
streamMock.Verify(_ => _.Seek(It.Is <long>(actualOffset => actualOffset == offset), It.Is <int>(actualDwOrigin => actualDwOrigin == expectedDwOrigin), It.IsAny <IntPtr>()), Times.Once);
}
}
public void StreamWrapper_ShouldReturnValidPosition_WhenSeekCalled()
{
// Arrange
long position = 5;
var stremMock = new Mock <IStream>();
stremMock
.Setup(x => x.Seek(It.IsAny <long>(), It.IsAny <int>(), It.IsAny <IntPtr>()))
.Callback <long, int, IntPtr>((dlibMove, dwOrigin, plibNewPosition) =>
{
Marshal.WriteInt64(plibNewPosition, position);
});
var streamWrapper = new ReadonlyStream(stremMock.Object);
// Act
var actualPosition = streamWrapper.Seek(0, SeekOrigin.Begin);
// Assert
Assert.AreEqual(position, actualPosition);
}