public void should_read_chars([ValueSource(nameof(GetEncodings))] Encoding encoding,
[ValueSource(nameof(GetBufferSegmentSizes))] int bufferSegmentSize)
{
CreateContext(encoding, bufferSegmentSize);
_writer.Write('X');
_writer.Write('X');
Assert.AreEqual((int)'X', _reader.PeekChar());
Assert.AreEqual('X', _reader.ReadChar());
Assert.AreEqual((int)'X', _reader.Read());
}