public async Task UpdateProfile()
        {
            await store.AddProfile(new UserProfile(testProfile.Username, "Foo", "Bar"));

            await store.UpdateProfile(testProfile);

            Assert.AreEqual(testProfile, await store.GetProfile(testProfile.Username));
        }
 public async Task UpdateProfile_StorageIsUnavailable()
 {
     await store.UpdateProfile(testProfile);
 }