public void CreateSemanticNetworkFromNodeCandidates_FilteredByIsSaveAsNode()
        {
            #region arrange

            var serviceUnderTests = CreateServiceUnderTest();

            FakeNodeRepository.GetByNotionAndType(Arg.Any <string>(), Arg.Any <NotionType>()).Returns((Node)null);
            var notionTypeId = GeneratedGuids.First;
            var notionType   = Substitute.For <NotionType>();
            FakeNotionTypeRepository.GetById(Arg.Is(notionTypeId)).Returns(notionType);

            var nodeCandidates = new[]
            {
                new NodeCandidate {
                    IsSaveAsNode = true, Notion = "notion", TypeId = notionTypeId
                },
                new NodeCandidate {
                    IsSaveAsNode = false, Notion = "notion2", TypeId = notionTypeId
                }
            };
            var session = CreateFakeSession("baseNotion");

            #endregion

            serviceUnderTests.CreateSemanticNetworkFromNodeCandidates(nodeCandidates, session);

            FakeNodeRepository.Received(1).AddOrUpdate(Arg.Is <Node>(x => x.Notion == "notion" && x.Type == notionType));
            FakeNodeRepository.DidNotReceive()
            .AddOrUpdate(Arg.Is <Node>(x => x.Notion == "notion2" && x.Type == notionType));
        }