static void test_read(SKStream bufferedStream, byte[] expectations, int bytesToRead)
{
// output for reading bufferedStream.
var storage = new byte[bytesToRead];
var bytesRead = bufferedStream.Read(storage, bytesToRead);
Assert.True(bytesRead == bytesToRead || bufferedStream.IsAtEnd);
Assert.Equal(expectations.Take(bytesRead), storage.Take(bytesRead));
}
private int compare_peek_to_read(SKStream stream, int bytesToPeek)
{
Assert.True(bytesToPeek > 0);
var peekStorage = SKData.Create(bytesToPeek);
var readStorage = SKData.Create(bytesToPeek);
var bytesPeeked = stream.Peek(peekStorage.Data, bytesToPeek);
var bytesRead = stream.Read(readStorage.Data, bytesToPeek);
// bytesRead should only be less than attempted if the stream is at the
// end.
Assert.True(bytesRead == bytesToPeek || stream.IsAtEnd);
// peek and read should behave the same, except peek returned to the
// original position, so they read the same data.
Assert.Equal(peekStorage.ToArray().Take(bytesPeeked), readStorage.ToArray().Take(bytesPeeked));
// A stream should never be able to peek more than it can read.
Assert.True(bytesRead >= bytesPeeked);
return(bytesRead - bytesPeeked);
}