public static void ReadWriteBuildWithRange(int threshold)
{
using var writer = new FileBufferingWriter(memoryThreshold: threshold, asyncIO: false);
var bytes = new byte[500];
for (byte i = 0; i < byte.MaxValue; i++)
{
bytes[i] = i;
}
writer.Write(bytes, 0, byte.MaxValue);
writer.Write(bytes.AsSpan(byte.MaxValue));
Equal(bytes.Length, writer.Length);
using var manager = writer.GetWrittenContent(0..255);
Equal(bytes.AsMemory(0, 255).ToArray(), manager.Memory.ToArray());
}
public static void CompatWithReadOnlySequence(int threshold)
{
using var writer = new FileBufferingWriter(memoryThreshold: threshold, asyncIO: false);
var bytes = new byte[500];
for (byte i = 0; i < byte.MaxValue; i++)
{
bytes[i] = i;
}
writer.Write(bytes, 0, 450);
writer.Write(bytes.AsSpan(450));
Equal(bytes.Length, writer.Length);
using var source = writer.GetWrittenContent(10);
Equal(bytes, source.Sequence.ToArray());
}
public static void DrainToSpan(int threshold)
{
using var writer = new FileBufferingWriter(memoryThreshold: threshold, asyncIO: false);
var bytes = new byte[500];
for (byte i = 0; i < byte.MaxValue; i++)
{
bytes[i] = i;
}
writer.Write(bytes, 0, byte.MaxValue);
writer.Write(bytes.AsSpan(byte.MaxValue));
Equal(bytes.Length, writer.Length);
var buffer = new byte[100];
Equal(buffer.Length, writer.CopyTo(buffer));
Equal(bytes[0..100], buffer);
public static void DrainToStream(int threshold)
{
using var writer = new FileBufferingWriter(memoryThreshold: threshold, asyncIO: false);
var bytes = new byte[500];
for (byte i = 0; i < byte.MaxValue; i++)
{
bytes[i] = i;
}
writer.Write(bytes, 0, byte.MaxValue);
writer.Write(bytes.AsSpan(byte.MaxValue));
Equal(bytes.Length, writer.Length);
using var ms = new MemoryStream(500);
writer.CopyTo(ms);
Equal(bytes, ms.ToArray());
}
public static void ReadWriteWithInitialCapacity(int threshold)
{
using var writer = new FileBufferingWriter(memoryThreshold: threshold, initialCapacity: 5, asyncIO: false);
var bytes = new byte[500];
for (byte i = 0; i < byte.MaxValue; i++)
{
bytes[i] = i;
}
writer.Write(bytes, 0, byte.MaxValue);
writer.Write(bytes.AsSpan(byte.MaxValue));
Equal(bytes.Length, writer.Length);
using var manager = writer.GetWrittenContent();
Equal(bytes, manager.Memory.ToArray());
if (writer.TryGetWrittenContent(out var content))
{
Equal(bytes, content.ToArray());
}
}
public static void StressTest3()
{
var buffer = new byte[1024 * 1024 * 10]; // 10 MB
new Random().NextBytes(buffer);
using var writer = new FileBufferingWriter(asyncIO: false);
writer.Write(buffer);
False(writer.TryGetWrittenContent(out _));
using var content = writer.GetWrittenContent();
True(buffer.AsSpan().SequenceEqual(content.Memory.Span));
}
public static async Task WriteDuringReadAsync()
{
using var writer = new FileBufferingWriter();
writer.Write(new byte[] { 1, 2, 3 });
using var manager = writer.GetWrittenContent();
Equal(new byte[] { 1, 2, 3 }, manager.Memory.ToArray());
Throws <InvalidOperationException>(writer.Clear);
Throws <InvalidOperationException>(() => writer.WriteByte(2));
Throws <InvalidOperationException>(() => writer.GetWrittenContent());
await ThrowsAsync <InvalidOperationException>(() => writer.WriteAsync(new byte[2], 0, 2));
await ThrowsAsync <InvalidOperationException>(writer.GetWrittenContentAsync().AsTask);
}
public void BufferingWriter()
{
using var writer = new FileBufferingWriter(memoryThreshold: MemoryThreshold, asyncIO: false);
foreach (var chunk in GetChunks())
{
writer.Write(chunk.Span);
}
writer.Flush();
using var ms = new MemoryStream(content.Length);
writer.CopyTo(ms);
}
public static void ReuseAfterCleanup(int threshold)
{
using var writer = new FileBufferingWriter(memoryThreshold: threshold, asyncIO: false);
var bytes = new byte[500];
for (byte i = 0; i < byte.MaxValue; i++)
{
bytes[i] = i;
}
writer.Write(bytes, 0, byte.MaxValue);
writer.Write(bytes.AsSpan(byte.MaxValue));
Equal(bytes.Length, writer.Length);
using (var manager = writer.GetWrittenContent())
Equal(bytes, manager.Memory.ToArray());
writer.Clear();
writer.Write(bytes, 0, byte.MaxValue);
writer.Write(bytes.AsSpan(byte.MaxValue));
Equal(bytes.Length, writer.Length);
using (var manager = writer.GetWrittenContent())
Equal(bytes, manager.Memory.ToArray());
}
public static void PermanentFile()
{
var expected = RandomBytes(500);
string fileName;
using (var writer = new FileBufferingWriter(new FileBufferingWriter.Options {
MemoryThreshold = 100, AsyncIO = false, FileName = Path.Combine(Path.GetTempPath(), Path.GetRandomFileName())
}))
{
writer.Write(expected);
False(writer.TryGetWrittenContent(out _, out fileName));
}
using var fs = new FileStream(fileName, FileMode.Open, FileAccess.Read);
var actual = new byte[expected.Length];
fs.ReadBlock(actual);
Equal(expected, actual);
}
