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()); }