public void CopyToAsync_should_call_wrapped_stream()
{
var stream = Substitute.For<Stream>();
var subject = new BsonStreamAdapter(stream);
var destination = Substitute.For<Stream>();
var bufferSize = 1;
var cancellationToken = new CancellationTokenSource().Token;
var task = new TaskCompletionSource<object>().Task;
stream.CopyToAsync(destination, bufferSize, cancellationToken).Returns(task);
var result = subject.CopyToAsync(destination, bufferSize, cancellationToken);
result.Should().Be(task);
stream.Received(1).CopyToAsync(destination, bufferSize, cancellationToken);
}
public void CopyToAsync_should_throw_when_subject_is_disposed()
{
var stream = Substitute.For<Stream>();
var subject = new BsonStreamAdapter(stream);
var destination = Substitute.For<Stream>();
var bufferSize = 1;
var cancellationToken = new CancellationTokenSource().Token;
subject.Dispose();
Action action = () => subject.CopyToAsync(destination, bufferSize, cancellationToken);
action.ShouldThrow<ObjectDisposedException>().And.ObjectName.Should().Be("BsonStreamAdapter");
}
public void CopyToAsync_should_call_wrapped_stream()
{
var mockStream = new Mock<Stream>();
var subject = new BsonStreamAdapter(mockStream.Object);
var mockDestination = new Mock<Stream>();
var bufferSize = 1;
var cancellationToken = new CancellationTokenSource().Token;
var task = new TaskCompletionSource<object>().Task;
mockStream.Setup(s => s.CopyToAsync(mockDestination.Object, bufferSize, cancellationToken)).Returns(task);
var result = subject.CopyToAsync(mockDestination.Object, bufferSize, cancellationToken);
result.Should().Be(task);
mockStream.Verify(s => s.CopyToAsync(mockDestination.Object, bufferSize, cancellationToken), Times.Once);
}