public void Rewind_ByOne()
{
ReadOnlySequence <byte> bytes = BufferFactory.Create(new byte[][] {
new byte[] { 0 },
new byte[] { 1, 2 },
new byte[] { 3, 4 },
new byte[] { 5, 6, 7, 8 }
});
ByteBufferReader reader = new ByteBufferReader(bytes);
reader.Advance(1);
ByteBufferReader copy = reader;
for (int i = 1; i < bytes.Length; i++)
{
reader.Advance(i);
for (int j = 0; j < i; j++)
{
reader.Rewind(1);
Assert.False(reader.End);
}
Assert.Equal(copy.Position, reader.Position);
Assert.Equal(copy.Consumed, reader.Consumed);
Assert.Equal(copy.CurrentSpanIndex, reader.CurrentSpanIndex);
Assert.Equal(copy.End, reader.End);
Assert.True(copy.CurrentSpan.SequenceEqual(reader.CurrentSpan));
}
}
public void IsNext_Span()
{
ReadOnlySequence <byte> bytes = BufferFactory.Create(new byte[][] {
new byte[] { 0 },
new byte[] { 1, 2 },
new byte[] { 3, 4 },
new byte[] { 5, 6, 7, 8 }
});
ByteBufferReader reader = new ByteBufferReader(bytes);
Assert.True(reader.IsNext(ReadOnlySpan <byte> .Empty, advancePast: false));
Assert.True(reader.IsNext(ReadOnlySpan <byte> .Empty, advancePast: true));
Assert.True(reader.IsNext(new byte[] { 0 }, advancePast: false));
Assert.False(reader.IsNext(new byte[] { 0, 2 }, advancePast: false));
Assert.False(reader.IsNext(new byte[] { 0, 2 }, advancePast: true));
Assert.True(reader.IsNext(new byte[] { 0, 1 }, advancePast: false));
Assert.False(reader.IsNext(new byte[] { 0, 1, 3 }, advancePast: false));
Assert.True(reader.IsNext(new byte[] { 0, 1, 2 }, advancePast: false));
Assert.False(reader.IsNext(new byte[] { 0, 1, 2, 4 }, advancePast: false));
Assert.True(reader.IsNext(new byte[] { 0, 1, 2, 3 }, advancePast: false));
Assert.True(reader.IsNext(new byte[] { 0, 1, 2, 3, 4 }, advancePast: false));
Assert.True(reader.IsNext(new byte[] { 0, 1, 2, 3, 4, 5 }, advancePast: false));
Assert.True(reader.IsNext(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8 }, advancePast: false));
Assert.False(reader.IsNext(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }, advancePast: false));
Assert.False(reader.IsNext(new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }, advancePast: true));
Assert.Equal(0, reader.Consumed);
Assert.True(reader.IsNext(new byte[] { 0, 1, 2, 3 }, advancePast: true));
Assert.True(reader.IsNext(new byte[] { 4, 5, 6 }, advancePast: true));
Assert.True(reader.TryPeek(out byte value));
Assert.Equal(7, value);
}
public void TryReadToSpan_Sequence(bool advancePastDelimiter)
{
ReadOnlySequence <byte> bytes = BufferFactory.Create(new byte[][] {
new byte[] { 0, 0 },
new byte[] { 1, 1, 2, 2 },
new byte[] { },
new byte[] { 3, 3, 4, 4, 5, 5, 6, 6 }
});
ByteBufferReader reader = new ByteBufferReader(bytes);
for (byte i = 0; i < bytes.Length / 2 - 1; i++)
{
byte[] expected = new byte[i * 2 + 1];
for (int j = 0; j < expected.Length - 1; j++)
{
expected[j] = (byte)(j / 2);
}
expected[i * 2] = i;
ReadOnlySpan <byte> searchFor = new byte [] { i, (byte)(i + 1) };
ByteBufferReader copy = reader;
Assert.True(copy.TryReadTo(out ReadOnlySequence <byte> seq, searchFor, advancePastDelimiter));
Assert.True(seq.ToArray().AsSpan().SequenceEqual(expected));
}
bytes = BufferFactory.Create(new byte[][] {
new byte[] { 47, 42, 66, 32, 42, 32, 66, 42, 47 } // /*b * b*/
});
reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out ReadOnlySequence <byte> sequence, new byte[] { 42, 47 }, advancePastDelimiter)); // */
Assert.True(sequence.ToArray().AsSpan().SequenceEqual(new byte[] { 47, 42, 66, 32, 42, 32, 66 }));
}
public void MultiSegmentBytesReaderNumbers()
{
var bytes = BufferFactory.Create(new byte[][] {
new byte[] { 0 },
new byte[] { 1, 2 },
new byte[] { 3, 4 },
new byte[] { 5, 6, 7, 8 },
new byte[] { 8, 0 },
new byte[] { 1, },
new byte[] { 0, 2, },
new byte[] { 1, 2, 3, 4 },
new byte[] { 5, 6 },
new byte[] { 7, 8, 9, },
new byte[] { 0, 1, 2, 3 },
new byte[] { 4, 5 },
new byte[] { 6, 7, 8, 9 },
new byte[] { 0, 1, 2, 3 },
new byte[] { 4 },
});
var reader = new ByteBufferReader(bytes);
Assert.True(reader.TryReadTo(out ReadOnlySequence <byte> bytesValue, 2));
var span = bytesValue.ToSpan();
Assert.Equal(0, span[0]);
Assert.Equal(1, span[1]);
Assert.True(reader.TryReadTo(out bytesValue, 5));
span = bytesValue.ToSpan();
Assert.Equal(3, span[0]);
Assert.Equal(4, span[1]);
Assert.True(reader.TryReadTo(out bytesValue, new byte[] { 8, 8 }));
span = bytesValue.ToSpan();
Assert.Equal(6, span[0]);
Assert.Equal(7, span[1]);
Assert.True(reader.TryRead(out int intValue));
Assert.Equal(BitConverter.ToInt32(new byte[] { 0, 1, 0, 2 }), intValue);
Assert.True(reader.TryReadInt(out intValue));
Assert.Equal(BitConverter.ToInt32(new byte[] { 4, 3, 2, 1 }), intValue);
Assert.True(reader.TryReadLongLE(out long longValue));
Assert.Equal(BitConverter.ToInt64(new byte[] { 5, 6, 7, 8, 9, 0, 1, 2 }), longValue);
Assert.True(reader.TryReadLong(out longValue));
Assert.Equal(BitConverter.ToInt64(new byte[] { 0, 9, 8, 7, 6, 5, 4, 3 }), longValue);
Assert.True(reader.TryReadShortLE(out short shortValue));
Assert.Equal(BitConverter.ToInt16(new byte[] { 1, 2 }), shortValue);
Assert.True(reader.TryReadShort(out shortValue));
Assert.Equal(BitConverter.ToInt16(new byte[] { 4, 3 }), shortValue);
}
public void TryReadTo_NotFound_Sequence(bool advancePastDelimiter)
{
ReadOnlySequence <byte> bytes = BufferFactory.Create(new byte[][] {
new byte[] { 1 },
new byte[] { 2, 3, 255 }
});
ByteBufferReader reader = new ByteBufferReader(bytes);
reader.Advance(4);
Assert.False(reader.TryReadTo(out ReadOnlySequence <byte> span, 255, 0, advancePastDelimiter));
}
public void TryReadTo_Sequence(bool advancePastDelimiter, bool useEscapeOverload)
{
ReadOnlySequence <byte> bytes = BufferFactory.Create(new byte[][] {
new byte[] { 0 },
new byte[] { 1, 2 },
new byte[] { },
new byte[] { 3, 4, 5, 6 }
});
ByteBufferReader reader = new ByteBufferReader(bytes);
// Read to 0-5
for (byte i = 0; i < bytes.Length - 1; i++)
{
ByteBufferReader copy = reader;
// Can read to the first integer (0-5)
Assert.True(
useEscapeOverload
? copy.TryReadTo(out ReadOnlySequence <byte> sequence, i, 255, advancePastDelimiter)
: copy.TryReadTo(out sequence, i, advancePastDelimiter));
// Should never have a null Position object
Assert.NotNull(copy.Position.GetObject());
var enumerator = sequence.GetEnumerator();
while (enumerator.MoveNext())
{
;
}
// Should be able to read to final 6
Assert.True(
useEscapeOverload
? copy.TryReadTo(out sequence, 6, 255, advancePastDelimiter)
: copy.TryReadTo(out sequence, 6, advancePastDelimiter));
Assert.NotNull(copy.Position.GetObject());
enumerator = sequence.GetEnumerator();
while (enumerator.MoveNext())
{
;
}
// If we didn't advance, we should still be able to read to 6
Assert.Equal(!advancePastDelimiter,
useEscapeOverload
? copy.TryReadTo(out sequence, 6, 255, advancePastDelimiter)
: copy.TryReadTo(out sequence, 6, advancePastDelimiter));
}
}
public void AdvancePastEmptySegments()
{
ReadOnlySequence <byte> bytes = BufferFactory.Create(new byte[][] {
new byte[] { 0 },
new byte[] { },
new byte[] { },
new byte[] { }
});
var reader = new ByteBufferReader(bytes);
reader.Advance(1);
Assert.Equal(0, reader.CurrentSpanIndex);
Assert.Equal(0, reader.CurrentSpan.Length);
Assert.False(reader.TryPeek(out byte value));
ReadOnlySequence <byte> sequence = reader.Sequence.Slice(reader.Position);
Assert.Equal(0, sequence.Length);
}
public void TryReadTo_SkipDelimiter_ReadOnlySequence()
{
byte[] expected = Encoding.UTF8.GetBytes("This is our ^|understanding^|");
ReadOnlySequence <byte> bytes = BufferFactory.CreateUtf8("This is our ^|understanding^|| you see.");
ByteBufferReader reader = new ByteBufferReader(bytes);
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 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 = BufferFactory.CreateUtf8("This is our ^|understanding", "^|| you see.");
reader = new ByteBufferReader(bytes);
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 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 = BufferFactory.CreateUtf8("This is our ^|understanding^", "|| you see.");
reader = new ByteBufferReader(bytes);
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 sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.IsNext((byte)'|'));
Assert.Equal(29, reader.Consumed);
// No trailing data
bytes = BufferFactory.CreateUtf8("This is our ^|understanding^||");
reader = new ByteBufferReader(bytes);
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 sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(expected, sequence.ToArray());
Assert.True(reader.End);
Assert.Equal(30, reader.Consumed);
// All delimiters skipped
bytes = BufferFactory.CreateUtf8("This is our ^|understanding^|");
reader = new ByteBufferReader(bytes);
Assert.False(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: false));
Assert.Equal(0, reader.Consumed);
reader = new ByteBufferReader(bytes);
Assert.False(reader.TryReadTo(out sequence, (byte)'|', (byte)'^', advancePastDelimiter: true));
Assert.Equal(0, reader.Consumed);
bytes = BufferFactory.CreateUtf8("abc^|de|");
reader = new ByteBufferReader(bytes);
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 = BufferFactory.CreateUtf8("^|a|b");
reader = new ByteBufferReader(bytes);
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 = BufferFactory.CreateUtf8("^", "|a|b");
reader = new ByteBufferReader(bytes);
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);
}
public void TryReadTo_SkipDelimiter_Runs()
{
ReadOnlySequence <byte> bytes = BufferFactory.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);
// Split after escape char
bytes = BufferFactory.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);
// Split before and after escape char
bytes = BufferFactory.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);
// 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);
// Leading run of 2
bytes = BufferFactory.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);
// Leading run of 3
bytes = BufferFactory.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);
// Trailing run of 3
bytes = BufferFactory.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);
// Trailing run of 3, split
bytes = BufferFactory.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);
}
