public void ShouldReturnEmptyStringForInvalidEmail()
			{
				var testData = UserTestData.Setup(false);

				var provider = new SrirachaMembershipProvider(testData.Repository.Object);
				string userName = provider.GetUserNameByEmail(Guid.NewGuid().ToString());

				Assert.AreEqual(string.Empty, userName);
			}
			public void ShouldReturnUserNameByEmail()
			{
				var testData = UserTestData.Setup(true);

				var provider = new SrirachaMembershipProvider(testData.Repository.Object);
				string userName = provider.GetUserNameByEmail(testData.SrirachaUser.EmailAddress);
				
				Assert.AreEqual(testData.SrirachaUser.UserName, userName);
			}