public void MoveTo_WithClear_ReturnsBuffers()
{
// Arrange
var input = new byte[] { 1, };
var arrayPool = new Mock <ArrayPool <byte> >();
var byteArray = new byte[PagedByteBuffer.PageSize];
arrayPool.Setup(p => p.Rent(PagedByteBuffer.PageSize))
.Returns(byteArray);
arrayPool.Setup(p => p.Return(byteArray, false)).Verifiable();
var memoryStream = new MemoryStream();
using (var buffer = new PagedByteBuffer(arrayPool.Object))
{
// Act
buffer.Add(input, 0, input.Length);
buffer.MoveTo(memoryStream);
// Assert
Assert.Equal(input, memoryStream.ToArray());
}
arrayPool.Verify(p => p.Rent(It.IsAny <int>()), Times.Once());
arrayPool.Verify(p => p.Return(It.IsAny <byte[]>(), It.IsAny <bool>()), Times.Once());
}
public void MoveTo_CopiesContentToStream()
{
// Arrange
var input = Enumerable.Repeat((byte)0xba, PagedByteBuffer.PageSize * 3 + 10).ToArray();
using var buffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
buffer.Add(input, 0, input.Length);
var stream = new MemoryStream();
// Act
buffer.MoveTo(stream);
// Assert
Assert.Equal(input, stream.ToArray());
// Verify moving new content works.
var newInput = Enumerable.Repeat((byte)0xcb, PagedByteBuffer.PageSize * 2 + 13).ToArray();
buffer.Add(newInput, 0, newInput.Length);
stream.SetLength(0);
buffer.MoveTo(stream);
Assert.Equal(newInput, stream.ToArray());
}
private static byte[] ReadBufferedContent(PagedByteBuffer buffer)
{
using var memoryStream = new MemoryStream();
buffer.MoveTo(memoryStream);
return(memoryStream.ToArray());
}
public void Add_AppendsToMultiplePages()
{
// Arrange
var input = Enumerable.Repeat((byte)0xba, PagedByteBuffer.PageSize + 10).ToArray();
using var buffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
// Act
buffer.Add(input, 0, input.Length);
// Assert
Assert.Equal(2, buffer.Pages.Count);
Assert.Equal(PagedByteBuffer.PageSize + 10, buffer.Length);
Assert.Equal(input.ToArray(), ReadBufferedContent(buffer));
}
public void Add_WithOffsets()
{
// Arrange
var input = new byte[] { 1, 2, 3, 4, 5 };
using var buffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
// Act
buffer.Add(input, 1, 3);
// Assert
Assert.Single(buffer.Pages);
Assert.Equal(3, buffer.Length);
Assert.Equal(new byte[] { 2, 3, 4 }, ReadBufferedContent(buffer));
}
public void Add_CreatesNewPage()
{
// Arrange
var input = Encoding.UTF8.GetBytes("Hello world");
using var buffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
// Act
buffer.Add(input, 0, input.Length);
// Assert
Assert.Single(buffer.Pages);
Assert.Equal(input.Length, buffer.Length);
Assert.Equal(input, ReadBufferedContent(buffer));
}
public void Add_FillsUpBuffer()
{
// Arrange
var input1 = Enumerable.Repeat((byte)0xba, PagedByteBuffer.PageSize - 1).ToArray();
var input2 = new byte[] { 0xca };
using var buffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
buffer.Add(input1, 0, input1.Length);
// Act
buffer.Add(input2, 0, 1);
// Assert
Assert.Single(buffer.Pages);
Assert.Equal(PagedByteBuffer.PageSize, buffer.Length);
Assert.Equal(Enumerable.Concat(input1, input2).ToArray(), ReadBufferedContent(buffer));
}
public void Add_AppendsToExistingPage()
{
// Arrange
var input1 = Encoding.UTF8.GetBytes("Hello");
var input2 = Encoding.UTF8.GetBytes("world");
using var buffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
buffer.Add(input1, 0, input1.Length);
// Act
buffer.Add(input2, 0, input2.Length);
// Assert
Assert.Single(buffer.Pages);
Assert.Equal(10, buffer.Length);
Assert.Equal(Enumerable.Concat(input1, input2).ToArray(), ReadBufferedContent(buffer));
}
public void Dispose_ReturnsBuffers_ExactlyOnce()
{
// Arrange
var input = Enumerable.Repeat((byte)0xba, PagedByteBuffer.PageSize * 3 + 10).ToArray();
var arrayPool = new Mock <ArrayPool <byte> >();
arrayPool.Setup(p => p.Rent(PagedByteBuffer.PageSize))
.Returns(new byte[PagedByteBuffer.PageSize]);
var buffer = new PagedByteBuffer(arrayPool.Object);
// Act
buffer.Add(input, 0, input.Length);
buffer.Dispose();
buffer.Dispose();
arrayPool.Verify(p => p.Rent(It.IsAny <int>()), Times.Exactly(4));
arrayPool.Verify(p => p.Return(It.IsAny <byte[]>(), It.IsAny <bool>()), Times.Exactly(4));
}
public async Task MoveToAsync_ClearsBuffers()
{
// Arrange
var input = Enumerable.Repeat((byte)0xba, PagedByteBuffer.PageSize * 3 + 10).ToArray();
using var buffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
buffer.Add(input, 0, input.Length);
var stream = new MemoryStream();
// Act
await buffer.MoveToAsync(stream, default);
// Assert
Assert.Equal(input, stream.ToArray());
// Verify copying it again works.
Assert.Equal(0, buffer.Length);
Assert.False(buffer.Disposed);
Assert.Empty(buffer.Pages);
}
/// <summary>
/// Initializes a new instance of <see cref="FileBufferingWriteStream"/>.
/// </summary>
/// <param name="memoryThreshold">
/// The maximum amount of memory in bytes to allocate before switching to a file on disk.
/// Defaults to 32kb.
/// </param>
/// <param name="bufferLimit">
/// The maximum amouont of bytes that the <see cref="FileBufferingWriteStream"/> is allowed to buffer.
/// </param>
/// <param name="tempFileDirectoryAccessor">Provides the location of the directory to write buffered contents to.
/// When unspecified, uses the value specified by the environment variable <c>ASPNETCORE_TEMP</c> if available, otherwise
/// uses the value returned by <see cref="Path.GetTempPath"/>.
/// </param>
public FileBufferingWriteStream(
int memoryThreshold = DefaultMemoryThreshold,
long?bufferLimit = null,
Func <string> tempFileDirectoryAccessor = null)
{
if (memoryThreshold < 0)
{
throw new ArgumentOutOfRangeException(nameof(memoryThreshold));
}
if (bufferLimit != null && bufferLimit < memoryThreshold)
{
// We would expect a limit at least as much as memoryThreshold
throw new ArgumentOutOfRangeException(nameof(bufferLimit), $"{nameof(bufferLimit)} must be larger than {nameof(memoryThreshold)}.");
}
_memoryThreshold = memoryThreshold;
_bufferLimit = bufferLimit;
_tempFileDirectoryAccessor = tempFileDirectoryAccessor ?? AspNetCoreTempDirectory.TempDirectoryFactory;
PagedByteBuffer = new PagedByteBuffer(ArrayPool <byte> .Shared);
}
