public async Task FlushAsync_CorrectBytesAreSaved(int shadowBufferSize, int totBytes, int writeBlockLength, bool delayedWriter)
{
byte[] inputBuffer = Enumerable.Range(1, totBytes).Select(f => (byte)f).ToArray();
byte[] destBuffer = new byte[totBytes];
MemoryStream destStream = new MemoryStream(destBuffer);
BufferedStreamWriter s = new BufferedStreamWriter(destStream, GetConfig(shadowBufferSize, delayedWriter));
for (int ix = 0; ix < totBytes; ix += writeBlockLength)
{
await s.WriteAsync(inputBuffer, ix, Math.Min(totBytes - ix, writeBlockLength));
}
await s.FlushAsync();
Assert.AreEqual(inputBuffer, destBuffer);
}
public async Task FlushAsync_StreamFlushes()
{
byte[] inputBuffer = Enumerable.Range(1, 10).Select(f => (byte)f).ToArray();
var streamMock = new Mock <Stream>(MockBehavior.Strict);
streamMock
.Setup(p => p.WriteAsync(It.IsAny <byte[]>(), It.IsAny <int>(), It.IsAny <int>(), It.IsAny <CancellationToken>()))
.Returns((byte[] buffer, int offset, int count, CancellationToken token) => Task.CompletedTask);
streamMock
.Setup(p => p.FlushAsync(It.IsAny <CancellationToken>()))
.Returns((CancellationToken token) => Task.CompletedTask);
BufferedStreamWriter s = new BufferedStreamWriter(streamMock.Object, GetConfig(4));
await s.WriteAsync(inputBuffer, 0, inputBuffer.Length, CancellationToken.None);
await s.FlushAsync(CancellationToken.None);
streamMock.Verify(f => f.FlushAsync(It.IsAny <CancellationToken>()), Times.Once());
}