public void ReadObjectId_should_return_expected_result()
        {
            var objectId = ObjectId.GenerateNewId();
            var bytes = objectId.ToByteArray();
            var stream = new MemoryStream(bytes);
            var subject = new BsonStreamAdapter(stream);

            var result = subject.ReadObjectId();

            result.Should().Be(objectId);
            subject.Position.Should().Be(12);
        }
        public void ReadObjectId_should_throw_when_subject_is_disposed()
        {
            var stream = Substitute.For<Stream>();
            var subject = new BsonStreamAdapter(stream);
            subject.Dispose();

            Action action = () => subject.ReadObjectId();

            action.ShouldThrow<ObjectDisposedException>().And.ObjectName.Should().Be("BsonStreamAdapter");
        }
        public void ReadObjectId_should_be_big_endian()
        {
            var bytes = new byte[] { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12 };
            var stream = new MemoryStream(bytes);
            var subject = new BsonStreamAdapter(stream);
            var expectedResult = new ObjectId(0x01020304, 0x050607, 0x0809, 0x0a0b0c);

            var result = subject.ReadObjectId();

            result.Should().Be(expectedResult);
        }