public void Decoder_LongPacketWithMultipleDelimiters_ParsedSuccessfully()
{
var input = new byte[512];
input[0] = 128;
Array.Fill <byte>(input, 0x04, 1, 127);
input[128] = 255;
Array.Fill <byte>(input, 0x42, 129, 254);
input[383] = 128;
Array.Fill <byte>(input, 0xAB, 384, 127);
input[511] = 0;
var decoder = new CobsDecoder();
byte[] output = null;
foreach (var b in input)
{
output = decoder.NextByte(b);
}
Assert.NotNull(output);
Assert.Equal(127 + 254 + 127 + 1, output.Length);
Assert.Equal(1, output.Count(a => a == 0x00));
Assert.Equal(127, output.Count(a => a == 0x04));
Assert.Equal(254, output.Count(a => a == 0x42));
Assert.Equal(127, output.Count(a => a == 0xAB));
}
public void Decode_TooLongInput_Fails()
{
var fullChunkLength = CobsEncoder.MAX_CHUNK_LENGTH - 1;
var fullChunksCount = CobsEncoder.MAX_PACKET_SIZE / fullChunkLength;
var totalBytesInFullChunks = fullChunksCount * fullChunkLength;
var bytesInLastChunk = CobsEncoder.MAX_PACKET_SIZE - totalBytesInFullChunks;
fullChunksCount++;
var input = GenerateInput(
Enumerable
.Repeat((byte)fullChunkLength, fullChunksCount)
.Append((byte)bytesInLastChunk)
.ToArray(),
0x04
);
var decoder = new CobsDecoder();
foreach (var b in input)
{
byte[] output = decoder.NextByte(b);
Assert.Null(output);
}
}
public void Decode_WithMaximumLengthInput_Works()
{
var fullChunkLength = CobsEncoder.MAX_CHUNK_LENGTH - 1;
var fullChunksCount = CobsEncoder.MAX_PACKET_SIZE / fullChunkLength;
var totalBytesInFullChunks = fullChunksCount * fullChunkLength;
var bytesInLastChunk = CobsEncoder.MAX_PACKET_SIZE - totalBytesInFullChunks;
var input = GenerateInput(
Enumerable
.Repeat((byte)fullChunkLength, fullChunksCount)
.Append((byte)bytesInLastChunk)
.ToArray(),
0x04
);
var decoder = new CobsDecoder();
byte[] output = null;
foreach (var b in input)
{
output = decoder.NextByte(b);
}
Assert.NotNull(output);
Assert.Equal(CobsEncoder.MAX_PACKET_SIZE, output.Length);
Assert.Equal(CobsEncoder.MAX_PACKET_SIZE, output.Count(a => a == 0x04));
}
public void Decoder_CompletePacket_ParsedSuccessfully()
{
var input = new byte[] { 0x01, 0x01, 0x00 };
var decoder = new CobsDecoder();
byte[] output = null;
foreach (var b in input)
{
output = decoder.NextByte(b);
}
Assert.NotNull(output);
Assert.Equal(new byte[] { 0x00 }, output);
}
public void Decoder_CompletePacketWithMultipleDelimiters_ParsedSuccessfully()
{
var input = new byte[] { 0x03, 0x01, 0x02, 0x04, 0x03, 0x04, 0x05, 0x02, 0x06, 0x00 };
var decoder = new CobsDecoder();
byte[] output = null;
foreach (var b in input)
{
output = decoder.NextByte(b);
}
Assert.NotNull(output);
Assert.Equal(new byte[] { 0x01, 0x02, 0x00, 0x03, 0x04, 0x05, 0x00, 0x06 }, output);
}
public void Decode_WithMixedChunkLength_Works(byte[] segmentsLength)
{
var input = GenerateInput(segmentsLength, 0x42);
var decoder = new CobsDecoder();
byte[] output = null;
foreach (var b in input)
{
output = decoder.NextByte(b);
}
var expectedValuesCount = segmentsLength.Select(b => (int)b).Sum();
var expectedEncodedDelimitersCount = segmentsLength.Count(b => b == (0xFF - 1));
var expectedLength = expectedValuesCount + expectedEncodedDelimitersCount;
Assert.NotNull(output);
Assert.Equal(expectedLength, output.Length);
Assert.Equal(expectedValuesCount, output.Count(a => a == 0x42));
}
public void Decoder_DelimiterInInput_ResetsParser()
{
var input = new byte[32];
Array.Fill <byte>(input, 0x04);
input[0] = 0x1F;
input[31] = 0x00;
input[12] = 0x00;
input[13] = 0x12;
var decoder = new CobsDecoder();
byte[] output = null;
foreach (var b in input)
{
output = decoder.NextByte(b);
}
Assert.NotNull(output);
Assert.Equal(17, output.Length);
Assert.Equal(17, output.Count(a => a == 0x04));
}