public void When_uploading_file_should_throw_ArgumentNullException_if_IBlobStorageClient_is_null()
{
IBlobStorageClient blobStorageClient = null;
var ex = Assert.Throws <ArgumentNullException>(() => blobStorageClient.UploadFile("SomeFile.txt", BlobName));
Assert.IsNotNull(ex);
Assert.AreEqual(ex.ParamName, "blobStorageClient");
}