public async Task DrainBufferAsync_CopiesContentFromMemoryStream()
{
// Arrange
var input = new byte[] { 1, 2, 3, 4, 5 };
using var bufferingStream = new FileBufferingWriteStream(tempFileDirectoryAccessor: () => TempDirectory);
bufferingStream.Write(input, 0, input.Length);
var memoryStream = new MemoryStream();
// Act
await bufferingStream.DrainBufferAsync(memoryStream, default);
// Assert
Assert.Equal(input, memoryStream.ToArray());
}
public async Task DrainBufferAsync_WithContentInDisk_CopiesContentFromMemoryStream()
{
// Arrange
var input = Enumerable.Repeat((byte)0xca, 30).ToArray();
using var bufferingStream = new FileBufferingWriteStream(memoryThreshold: 21, tempFileDirectoryAccessor: () => TempDirectory);
bufferingStream.Write(input, 0, input.Length);
var memoryStream = new MemoryStream();
// Act
await bufferingStream.DrainBufferAsync(memoryStream, default);
// Assert
Assert.Equal(input, memoryStream.ToArray());
}
public async Task DrainBufferAsync_IncludesContentPossiblyBufferedByFileStream()
{
// We want to ensure that the FileStream (which has a 1-byte buffer) flushes prior to the other read stream reading input.
// Arrange
var input = new byte[] { 3, };
using var bufferingStream = new FileBufferingWriteStream(0, tempFileDirectoryAccessor: () => TempDirectory);
bufferingStream.Write(input, 0, input.Length);
var memoryStream = new MemoryStream();
// Act
await bufferingStream.DrainBufferAsync(memoryStream, default);
// Assert
Assert.Equal(input, memoryStream.ToArray());
Assert.Equal(0, bufferingStream.Length);
}