public static void EncoderExceptionFallbackBufferTest()
{
Encoder encoder = Encoding.GetEncoding("us-ascii", new EncoderExceptionFallback(), new DecoderExceptionFallback()).GetEncoder();
char [] chars = new char[] { '\uFFFF' };
byte [] bytes = new byte[2];
Assert.Throws <EncoderFallbackException>(() => encoder.GetBytes(chars, 0, 1, bytes, 0, true));
EncoderFallbackBuffer fallbackBuffer = encoder.FallbackBuffer;
Assert.True(fallbackBuffer is EncoderExceptionFallbackBuffer, "Expected to get EncoderExceptionFallbackBuffer type");
Assert.Throws <EncoderFallbackException>(() => fallbackBuffer.Fallback(chars[0], 0));
Assert.Throws <EncoderFallbackException>(() => fallbackBuffer.Fallback('\u0040', 0));
Assert.Throws <EncoderFallbackException>(() => fallbackBuffer.Fallback('\uD800', '\uDC00', 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 override bool MovePrevious()
{
if (Data.HasValue)
{
return(LastResortEncoderFallbackBuffer.MovePrevious());
}
Pos = 0;
return(true);
}
public static void EncoderReplacementFallbackBufferTest()
{
Encoder encoder = Encoding.GetEncoding("us-ascii", new EncoderReplacementFallback(), new DecoderReplacementFallback()).GetEncoder();
char [] chars = new char [] { '\uFFFF' };
byte [] bytes = new byte [2];
EncoderFallbackBuffer fallbackBuffer = encoder.FallbackBuffer;
Assert.True(fallbackBuffer is EncoderReplacementFallbackBuffer, "Expected to get EncoderReplacementFallbackBuffer type");
Assert.True(fallbackBuffer.Fallback(chars[0], 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");
}
