public void StreamWrapperShouldSetValidBufferWhenReadCalled(int count, int offset)
{
// Arrange
var inputBuffer = new byte[1024];
var streamBytes = new byte[count];
for (int i = 0; i < count; i++)
{
streamBytes[i] = (byte)i;
}
var streamMock = new Mock <IStream>();
streamMock
.Setup(x => x.Read(It.IsAny <byte[]>(), It.IsAny <int>(), It.IsAny <IntPtr>()))
.Callback <byte[], int, IntPtr>((buffer, countToRead, bytesReadPtr) =>
{
Array.Copy(streamBytes, 0, buffer, 0, streamBytes.Length);
Marshal.WriteInt32(bytesReadPtr, count);
});
using (var streamWrapper = new ReadonlyStream(streamMock.Object))
{
// Act
var bytesRead = streamWrapper.Read(inputBuffer, offset, count);
// Assert
CollectionAssert.AreEqual(streamBytes, inputBuffer.Skip(offset).Take(count).ToArray());
Assert.AreEqual(count, bytesRead);
}
}
public void StreamWrapper_ShouldThrow_WhenReadCalledWithOutOfRangeArguments(int bufferLength, int offSet, int bytesToRead)
{
// Arrange
var buffer = new byte[bufferLength];
var stremMock = new Mock <IStream>();
ArgumentOutOfRangeException exception = null;
var streamWrapper = new ReadonlyStream(stremMock.Object);
// Act
try
{
streamWrapper.Read(buffer, offSet, bytesToRead);
}
catch (ArgumentOutOfRangeException ex)
{
exception = ex;
}
// Assert
Assert.IsNotNull(exception);
}