public void ThrowIfEndOfStream_should_throw_when_position_plus_length_exceeds_2GB()
{
using (var buffer = new ByteArrayBuffer(new byte[1024]))
using (var subject = new ByteBufferStream(buffer))
{
subject.Position = 1024;
subject.WriteInt32(int.MaxValue - 128);
subject.Position = 1024;
Action action = () => subject.ReadSlice(); // indirectly calls private ThrowIfEndOfStream method
action.ShouldThrow<EndOfStreamException>();
}
}
public void ReadSlice_should_return_expected_result(int length, byte[] bytes)
{
var buffer = Substitute.For<IByteBuffer>();
buffer.AccessBackingBytes(Arg.Any<int>()).Returns(x => { var p = (int)x[0]; return new ArraySegment<byte>(bytes, p, bytes.Length - p); });
buffer.IsReadOnly.Returns(true);
buffer.Length.Returns(bytes.Length);
var subject = new ByteBufferStream(buffer);
var expectedPosition = length;
subject.ReadSlice();
subject.Position.Should().Be(expectedPosition);
subject.Buffer.Received(1).GetSlice(0, bytes.Length);
}
public void ReadSlice_should_return_expected_result(int length, byte[] bytes)
{
var mockBuffer = new Mock<IByteBuffer>();
mockBuffer.Setup(s => s.AccessBackingBytes(It.IsAny<int>())).Returns((int p) => { return new ArraySegment<byte>(bytes, p, bytes.Length - p); });
mockBuffer.SetupGet(s => s.IsReadOnly).Returns(true);
mockBuffer.SetupGet(s => s.Length).Returns(bytes.Length);
var subject = new ByteBufferStream(mockBuffer.Object);
var expectedPosition = length;
subject.ReadSlice();
subject.Position.Should().Be(expectedPosition);
mockBuffer.Verify(b => b.GetSlice(0, bytes.Length), Times.Once);
}
