public void TargetStreamIsCommittedOnlyOnceEvenIfStreamIsRewound()
{
var targetStream = new Mock <Stream> {
CallBase = true
};
var streamTransacted = targetStream.As <ITransactionalStream>();
streamTransacted.Setup(s => s.Commit());
using (var stream = new ReplicatingReadStream(new MemoryStream(_content), targetStream.Object))
{
stream.Drain();
stream.Position = 0;
stream.Drain();
}
streamTransacted.Verify(s => s.Commit(), Times.Once());
}
public void SourceStreamCannotBeSoughtBeforeExhaustion()
{
using (var stream = new ReplicatingReadStream(new MemoryStream(_content), new MemoryStream()))
{
Assert.That(stream.CanSeek, Is.False);
// don't drain the whole stream
stream.Read(new byte[1024], 0, 1024);
Assert.That(
() => stream.Position = 0,
Throws.InstanceOf <InvalidOperationException>()
.With.Message.EqualTo(
string.Format("{0} is not seekable while the inner stream has not been thoroughly read and replicated.", typeof(ReplicatingReadStream).Name)));
Assert.That(
() => stream.Seek(0, SeekOrigin.Begin),
Throws.InstanceOf <InvalidOperationException>()
.With.Message.EqualTo(
string.Format("{0} cannot be sought while the inner stream has not been thoroughly read and replicated.", typeof(ReplicatingReadStream).Name)));
}
}