public async Task BuildThrowsWhenBothPartitionProcessorFactoriesSpecified() { builder .WithFeedDocumentClient(CreateMockDocumentClient()) .WithLeaseDocumentClient(CreateMockDocumentClient()) .WithObserverFactory(Mock.Of <IChangeFeedObserverFactory>()) .WithPartitionProcessorFactory(Mock.Of <IPartitionProcessorFactory>()) .WithCheckpointPartitionProcessorFactory(Mock.Of <ICheckpointPartitionProcessorFactory>()); await Assert.ThrowsAsync <ArgumentException>(async() => await builder.BuildAsync()); }