public async Task WhenClassHasNoMetaName_ThrowsArgumentException()
        {
            var t = new InvalidTestObject();

            Assert.Throws <ArgumentException>(() =>
            {
                var helper = new AzureFileStorage <InvalidTestObject>(new Mock <ICloudBlobContainer>().Object,
                                                                      o => new byte[0]);
            });
        }
        public async Task WhenClassHasNoMetaName_ThrowsArgumentException()
        {
            var t = new InvalidTestObject();
            Assert.Throws<ArgumentException>(() =>
            {
                var helper = new AzureFileStorage<InvalidTestObject>(new Mock<ICloudBlobContainer>().Object,
                    o => new byte[0]);
            });

        }