public void TargetStreamIsNotCommittedIfSourceStreamNotExhausted()
{
var targetStream = new Mock <Stream> {
CallBase = true
};
targetStream.As <IStreamTransacted>();
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 <IStreamTransacted>().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);
Action act = () => stream.Position = 0;
act.Should().Throw <InvalidOperationException>()
.WithMessage($"{typeof(ReplicatingReadStream).Name} is not seekable while the inner stream has not been thoroughly read and replicated.");
act = () => stream.Seek(0, SeekOrigin.Begin);
act.Should().Throw <InvalidOperationException>()
.WithMessage($"{typeof(ReplicatingReadStream).Name} cannot be sought while the inner stream has not been thoroughly read and replicated.");
}
}
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)));
}
}