public static void DecoderExceptionFallbackBufferTest()
{
Decoder decoder = Encoding.GetEncoding("us-ascii", new EncoderExceptionFallback(), new DecoderExceptionFallback()).GetDecoder();
byte [] bytes = new byte [] { 0xFF, 0xFF };
char [] chars = new char [bytes.Length];
Assert.Throws <DecoderFallbackException>(() => decoder.GetChars(bytes, 0, 2, chars, 2));
DecoderFallbackBuffer fallbackBuffer = decoder.FallbackBuffer;
Assert.True(fallbackBuffer is DecoderExceptionFallbackBuffer, "Expected to get DecoderExceptionFallbackBuffer type");
Assert.Throws <DecoderFallbackException>(() => fallbackBuffer.Fallback(bytes, 0));
Assert.Throws <DecoderFallbackException>(() => fallbackBuffer.Fallback(new byte [] { 0x40, 0x60 }, 0));
Assert.Equal(0, fallbackBuffer.Remaining);
Assert.Equal('\u0000', fallbackBuffer.GetNextChar());
Assert.False(fallbackBuffer.MovePrevious(), "MovePrevious expected to always return false");
fallbackBuffer.Reset();
Assert.Equal(0, fallbackBuffer.Remaining);
Assert.Equal('\u0000', fallbackBuffer.GetNextChar());
}
public static void DecoderReplacementFallbackBufferTest()
{
Decoder decoder = Encoding.GetEncoding("us-ascii", new EncoderReplacementFallback(), new DecoderReplacementFallback()).GetDecoder();
byte [] bytes = new byte [] { 0xFF, 0xFF };
char [] chars = new char [bytes.Length];
DecoderFallbackBuffer fallbackBuffer = decoder.FallbackBuffer;
Assert.True(fallbackBuffer is DecoderReplacementFallbackBuffer, "Expected to get DecoderReplacementFallbackBuffer type");
Assert.True(fallbackBuffer.Fallback(bytes, 0), "Expected we fallback on the given buffer");
Assert.Equal(1, fallbackBuffer.Remaining);
Assert.False(fallbackBuffer.MovePrevious(), "Expected we cannot move back on the replacement buffer as we are at the Beginning of the buffer");
Assert.Equal('?', fallbackBuffer.GetNextChar());
Assert.True(fallbackBuffer.MovePrevious(), "Expected we can move back on the replacement buffer");
Assert.Equal('?', fallbackBuffer.GetNextChar());
fallbackBuffer.Reset();
Assert.Equal(0, fallbackBuffer.Remaining);
Assert.Equal('\u0000', fallbackBuffer.GetNextChar());
Assert.False(fallbackBuffer.MovePrevious(), "Expected we cannot move back on the replacement buffer as we are rest the buffer");
}
public override bool MovePrevious()
{
return(_parentBuffer == null ? false : _parentBuffer.MovePrevious());
}
public override bool MovePrevious()
{
return(buffer.MovePrevious());
}