public static void ReadWriteUsingArray()
{
using var writer = new PooledArrayBufferWriter <byte>(ArrayPool <byte> .Shared, 25);
True(writer.Capacity >= 25);
True(writer.WrittenArray.Count == 0);
Equal(0, writer.WrittenCount);
var memory = writer.GetArray(100);
new ArraySegment <byte>(new byte[] { 10, 20, 30 }).CopyTo(memory);
writer.Advance(3);
var result = writer.WrittenArray;
Equal(3, result.Count);
Equal(3, writer.WrittenCount);
Equal(10, result[0]);
Equal(20, result[1]);
Equal(30, result[2]);
memory = writer.GetArray(3);
new ArraySegment <byte>(new byte[] { 40, 50, 60 }).CopyTo(memory);
writer.Advance(3);
result = writer.WrittenArray;
Equal(6, writer.WrittenCount);
Equal(6, result.Count);
Equal(10, result[0]);
Equal(20, result[1]);
Equal(30, result[2]);
Equal(40, result[3]);
Equal(50, result[4]);
Equal(60, result[5]);
}
public static void WriterAsReadOnlyCollection()
{
using var writer = new PooledArrayBufferWriter <int>();
IReadOnlyList <int> collection = writer;
Empty(collection);
writer.Add(42);
Equal(1, writer.WrittenCount);
Equal(1, collection.Count);
Equal(42, collection[0]);
Throws <IndexOutOfRangeException>(() => collection[1]);
Equal(42, Enumerable.First(collection));
Equal(1, Enumerable.Count(collection));
writer.AddAll(new[] { 43, 44 });
Equal(3, writer.WrittenCount);
Equal(3, collection.Count);
Equal(42, collection[0]);
Equal(43, collection[1]);
Equal(44, collection[2]);
Throws <IndexOutOfRangeException>(() => collection[3]);
Equal(3, Enumerable.Count(collection));
Equal(new[] { 42, 43, 44 }, Enumerable.ToArray(collection));
}
public static void PooledArrayBufferWriterDefaultCapacity()
{
using (var writer = new PooledArrayBufferWriter <byte>(ArrayPool <byte> .Shared))
WriteReadUsingSpan(writer);
using (var writer = new PooledArrayBufferWriter <byte>(ArrayPool <byte> .Shared))
WriteReadUsingMemory(writer);
}
public static void PooledArrayBufferWriterWithCapacity()
{
Throws <ArgumentOutOfRangeException>(new Action(() => new PooledArrayBufferWriter <byte>(ArrayPool <byte> .Shared, 0)));
using (var writer = new PooledArrayBufferWriter <byte>(ArrayPool <byte> .Shared, 30))
WriteReadUsingSpan(writer);
using (var writer = new PooledArrayBufferWriter <byte>(ArrayPool <byte> .Shared, 20))
WriteReadUsingMemory(writer);
}
public static void WriterAsList()
{
using var writer = new PooledArrayBufferWriter <int>();
IList <int> list = writer;
False(list.IsReadOnly);
Empty(writer);
True(list.IndexOf(0) < 0);
False(list.Contains(0));
False(list.Remove(0));
Throws <ArgumentOutOfRangeException>(() => list.RemoveAt(0));
list.Add(42);
Equal(1, writer.WrittenCount);
Equal(1, list.Count);
Equal(42, list[0]);
True(list.Contains(42));
False(list.Contains(0));
Equal(0, list.IndexOf(42));
Throws <ArgumentOutOfRangeException>(() => list[1]);
Equal(42, Enumerable.First(list));
Equal(1, Enumerable.Count(list));
list[0] = 10;
Equal(10, writer.WrittenArray[0]);
list.Insert(0, 42);
Equal(2, writer.WrittenCount);
Equal(2, list.Count);
True(list.Contains(10));
True(list.Contains(42));
Equal(0, list.IndexOf(42));
Equal(1, list.IndexOf(10));
Equal(42, list[0]);
Equal(10, list[1]);
list.RemoveAt(0);
Equal(1, writer.WrittenCount);
Equal(1, list.Count);
Equal(10, list[0]);
True(list.Contains(10));
False(list.Contains(42));
True(list.Remove(10));
Empty(list);
Throws <ArgumentOutOfRangeException>(() => list.Insert(1, 56));
list.Insert(0, 56);
Equal(1, writer.WrittenCount);
Equal(1, list.Count);
Equal(56, list[0]);
//check insertion with overflow
for (var i = writer.Capacity; i > 0; i--)
{
list.Insert(0, i + 100);
}
}
public static void BufferSizeCallback()
{
var counter = new AllocationEventCounter();
using (var writer = new PooledArrayBufferWriter <byte> {
BufferSizeCallback = counter.WriteMetric
})
writer.Write(new byte[] { 1, 2, 3 });
True(counter.Value >= 3);
}
public string BuildStringUsingPooledArrayBufferWriter()
{
using var writer = new PooledArrayBufferWriter <char>();
for (var i = 0; i < 100; i++)
{
writer.Write(StringValue);
writer.WriteInt32(int.MaxValue);
writer.WriteLine();
}
return(writer.BuildString());
}
public static void RemoveHeadElements()
{
using var writer = new PooledArrayBufferWriter <string>();
writer.Add("a");
writer.Add("b");
writer.Add("c");
writer.RemoveFirst(2);
Equal(1, writer.WrittenCount);
Equal("c", writer[0]);
writer.RemoveFirst(1);
Equal(0, writer.WrittenCount);
Throws <ArgumentOutOfRangeException>(() => writer.RemoveFirst(-1));
}
public static void ReuseArrayWriter()
{
using var writer = new PooledArrayBufferWriter <byte>();
var span = writer.GetSpan(10);
span[0] = 20;
span[9] = 30;
writer.Advance(10);
writer.Clear();
span = writer.GetSpan(10);
span[0] = 40;
span[9] = 50;
writer.Advance(10);
Equal(40, writer.WrittenMemory.Span[0]);
Equal(50, writer.WrittenMemory.Span[9]);
}
public static void StreamInterop()
{
using var writer = new PooledArrayBufferWriter <byte>();
var span = writer.GetSpan(10);
new byte[] { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 }.AsSpan().CopyTo(span);
writer.Advance(10);
using var stream = StreamSource.GetWrittenBytesAsStream(writer);
True(stream.CanRead);
False(stream.CanWrite);
Equal(0, stream.Position);
Equal(10, stream.Length);
var buffer = new byte[10];
Equal(10, stream.Read(buffer, 0, 10));
for (var i = 0; i < buffer.Length; i++)
{
Equal(i, buffer[i]);
}
}
public static void StressTest()
{
var dict = new Dictionary <string, string>
{
{ "Key1", "Value1" },
{ "Key2", "Value2" }
};
using var writer = new PooledArrayBufferWriter <byte>();
// serialize dictionary to memory
using (var output = StreamSource.AsStream(writer))
{
DictionarySerializer.Serialize(dict, output);
}
// deserialize from memory
using (var input = StreamSource.AsStream(writer.WrittenArray))
{
Equal(dict, DictionarySerializer.Deserialize(input));
}
}
public static void StressTest()
{
var dict = new Dictionary <string, string>
{
{ "Key1", "Value1" },
{ "Key2", "Value2" }
};
var formatter = new BinaryFormatter();
using var writer = new PooledArrayBufferWriter <byte>();
// serialize dictionary to memory
using (var output = StreamSource.AsStream(writer))
{
formatter.Serialize(output, dict);
}
// deserialize from memory
using (var input = StreamSource.GetWrittenBytesAsStream(writer))
{
Equal(dict, formatter.Deserialize(input));
}
}
public static void Insertion()
{
Span <byte> block = stackalloc byte[] { 10, 20, 30 };
using var writer = new PooledArrayBufferWriter <byte>();
writer.Insert(0, block);
Equal(3, writer.WrittenCount);
Equal(10, writer[0]);
Equal(20, writer[1]);
Equal(30, writer[2]);
block[0] = 40;
block[1] = 50;
block[2] = 60;
writer.Insert(3, block);
Equal(6, writer.WrittenCount);
Equal(10, writer[0]);
Equal(20, writer[1]);
Equal(30, writer[2]);
Equal(40, writer[3]);
Equal(50, writer[4]);
Equal(60, writer[5]);
writer.Clear(true);
var random = RandomBytes(writer.FreeCapacity);
writer.Write(random);
Equal(0, writer.FreeCapacity);
block[0] = 100;
block[1] = 110;
block[2] = 120;
writer.Insert(writer.WrittenCount - 1, block);
Equal(random[0..(random.Length - 1)], writer.WrittenMemory.Span.Slice(0, random.Length - 1).ToArray());
public void AddRangeToArrayWriter()
{
using var writer = new PooledArrayBufferWriter <int>(10);
writer.Write(inputArray);
}
public void WriteToGrowableBuffer()
{
using var buffer = new PooledArrayBufferWriter <byte>();
using var ms = buffer.AsStream();
Write(ms);
}
public static void ReadWriteUsingPooledArrayBufferWriter()
{
using var writer = new PooledArrayBufferWriter <byte>();
Null(writer.As <IGrowableBuffer <byte> >().Capacity);
ReadWriteTest(writer);
}