public void FirstCallFetchesNewItems()
{
_store.LoadData(_loc).Returns(Task.FromResult <DataWithMetadata>(null));
_store.TryOptimisticWrite(_loc, null, null, null, CancellationToken.None).ReturnsForAnyArgs(Task.FromResult(new OptimisticStoreWriteResult {
Result = true
}));
var generator = GetGenerator(10);
var id = generator.NextId().Result;
_store.Received(1).LoadData(_loc);
Assert.AreEqual(1, id);
}
