public void TargetStreamIsNotCommittedIfSourceStreamNotExhausted()
{
var targetStream = new Mock <System.IO.Stream> {
CallBase = true
};
targetStream.As <ITransactionalStream>();
using (var stream = new ReplicatingReadStream(new MemoryStream(_content), targetStream.Object))
{
// don't drain the whole stream
stream.Read(new byte[1024], 0, 1024);
}
// Rollback() is never called explicitly when targetStream is disposed, but neither is Commit()
targetStream.As <ITransactionalStream>().Verify(s => s.Commit(), Times.Never());
}
public void SourceStreamCannotBeSoughtBeforeExhaustion()
{
using (var stream = new ReplicatingReadStream(new MemoryStream(_content), new MemoryStream()))
{
stream.CanSeek.Should().BeFalse();
// don't drain the whole stream
stream.Read(new byte[1024], 0, 1024);
Invoking(() => stream.Position = 0)
.Should().Throw <InvalidOperationException>()
.WithMessage($"{nameof(ReplicatingReadStream)} is not seekable while the inner stream has not been thoroughly read and replicated.");
Invoking(() => stream.Seek(0, SeekOrigin.Begin))
.Should().Throw <InvalidOperationException>()
.WithMessage($"{nameof(ReplicatingReadStream)} cannot be sought while the inner stream has not been thoroughly read and replicated.");
}
}