public void TryReadTo_SkipDelimiter_Runs()
{
ReadOnlySequence <byte> bytes = SequenceFactory.CreateUtf8("abc^^|def");
ByteBufferReader reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out ReadOnlySpan <byte> span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(5, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out ReadOnlySequence <byte> sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(5, reader.Consumed);
// Split after escape char
bytes = SequenceFactory.CreateUtf8("abc^^", "|def");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(5, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(5, reader.Consumed);
// Split before and after escape char
bytes = SequenceFactory.CreateUtf8("abc^", "^", "|def");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(5, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(5, reader.Consumed);
// Check advance past delimiter
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), span.ToArray());
Assert.True(reader.IsNext((byte)'d'));
Assert.Equal(6, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("abc^^"), sequence.ToArray());
Assert.True(reader.IsNext((byte)'d'));
Assert.Equal(6, reader.Consumed);
// Leading run of 2
bytes = SequenceFactory.CreateUtf8("^^|abc");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("^^"), span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(2, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(Encoding.UTF8.GetBytes("^^"), sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(2, reader.Consumed);
// Leading run of 3
bytes = SequenceFactory.CreateUtf8("^^^|abc");
reader = new ByteBufferReader(bytes);
Assert.False(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.True(reader.IsNext((byte)'^'));
Assert.Equal(0, reader.Consumed);
Assert.False(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.True(reader.IsNext((byte)'^'));
Assert.Equal(0, reader.Consumed);
// Trailing run of 3
bytes = SequenceFactory.CreateUtf8("abc^^^|");
reader = new ByteBufferReader(bytes);
Assert.False(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.True(reader.IsNext((byte)'a'));
Assert.Equal(0, reader.Consumed);
Assert.False(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.True(reader.IsNext((byte)'a'));
Assert.Equal(0, reader.Consumed);
// Trailing run of 3, split
bytes = SequenceFactory.CreateUtf8("abc^^^", "|");
reader = new ByteBufferReader(bytes);
Assert.False(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.True(reader.IsNext((byte)'a'));
Assert.Equal(0, reader.Consumed);
Assert.False(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.True(reader.IsNext((byte)'a'));
Assert.Equal(0, reader.Consumed);
}
public void TryReadTo_SkipDelimiter()
{
byte[] expected = Encoding.UTF8.GetBytes("This is our ^|understanding^|");
ReadOnlySequence <byte> bytes = SequenceFactory.CreateUtf8("This is our ^|understanding^|| you see.");
ByteBufferReader reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out ReadOnlySpan <byte> span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.IsNext((byte)' '));
Assert.Equal(30, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out ReadOnlySequence <byte> sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)' '));
Assert.Equal(30, reader.Consumed);
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
// Put the skip delimiter in another segment
bytes = SequenceFactory.CreateUtf8("This is our ^|understanding", "^|| you see.");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.IsNext((byte)' '));
Assert.Equal(30, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)' '));
Assert.Equal(30, reader.Consumed);
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
// Put the skip delimiter at the end of the segment
bytes = SequenceFactory.CreateUtf8("This is our ^|understanding^", "|| you see.");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.IsNext((byte)' '));
Assert.Equal(30, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)' '));
Assert.Equal(30, reader.Consumed);
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
// No trailing data
bytes = SequenceFactory.CreateUtf8("This is our ^|understanding^||");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, span.ToArray());
Assert.True(reader.End);
Assert.Equal(30, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.End);
Assert.Equal(30, reader.Consumed);
// All delimiters skipped
bytes = SequenceFactory.CreateUtf8("This is our ^|understanding^|");
reader = new ByteBufferReader(bytes);
Assert.False(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(0, reader.Consumed);
Assert.False(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(0, reader.Consumed);
reader = new ByteBufferReader(bytes);
Assert.False(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(0, reader.Consumed);
Assert.False(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(0, reader.Consumed);
bytes = SequenceFactory.CreateUtf8("abc^|de|");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("abc^|de"), span.ToArray());
Assert.True(reader.End);
Assert.Equal(8, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("abc^|de"), sequence.ToArray());
Assert.True(reader.End);
Assert.Equal(8, reader.Consumed);
// Escape leads
bytes = SequenceFactory.CreateUtf8("^|a|b");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("^|a"), span.ToArray());
Assert.True(reader.IsNext((byte)'b'));
Assert.Equal(4, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("^|a"), sequence.ToArray());
Assert.True(reader.IsNext((byte)'b'));
Assert.Equal(4, reader.Consumed);
// Delimiter starts second segment.
bytes = SequenceFactory.CreateUtf8("^", "|a|b");
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out span, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("^|a"), span.ToArray());
Assert.True(reader.IsNext((byte)'b'));
Assert.Equal(4, reader.Consumed);
reader.Rewind(reader.Consumed);
Assert.True(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(Encoding.UTF8.GetBytes("^|a"), sequence.ToArray());
Assert.True(reader.IsNext((byte)'b'));
Assert.Equal(4, reader.Consumed);
}