public async Task CreateSharedAccessSignature_returns_token_created_using_DelegationKey()
        {
            var config = new CvpConfiguration()
            {
                StorageEndpoint    = "https://container.blob.core.windows.net/", StorageContainerName = "container",
                StorageAccountName = "accountName", StorageAccountKey = "YWNjb3VudEtleQ=="
            };

            var blobServiceClient = new Mock <BlobServiceClient>();

            blobServiceClient
            .Setup(x => x.GetUserDelegationKeyAsync(It.IsAny <DateTimeOffset>(), It.IsAny <DateTimeOffset>(), It.IsAny <CancellationToken>()))
            .ReturnsAsync(Response.FromValue(BlobsModelFactory.UserDelegationKey("", "", "", "", "", DateTimeOffset.Now, DateTimeOffset.Now), null));

            var service = new CvpAzureStorageService(blobServiceClient.Object, config, true);

            var result = await service.CreateSharedAccessSignature("myFilePath", TimeSpan.FromDays(7));

            result.Should().NotBeNullOrEmpty();
            result.Should().StartWith($"{config.StorageEndpoint}{config.StorageContainerName}/myFilePath?");

            blobServiceClient
            .Verify(x => x.GetUserDelegationKeyAsync(It.IsAny <DateTimeOffset>(), It.IsAny <DateTimeOffset>(), It.IsAny <CancellationToken>()), Times.Once);
        }