public void Should_return_ancestors_calling_GetAncestors()
        {
            // arrange
            var testTarget = new TestTarget
            {
                Id = 345,
                Data = new TestTargetData { TestString = "Its a target!" }
            };
            var node = new HierarchyNode
            {
                Id = 34,
                LeftId = 2,
                RightId = 3,
                TargetId = testTarget.Id
            };
            var ancestor1 = new HierarchyNode
            {
                Id = 22,
                LeftId = 1,
                RightId = 6,
                TargetId = testTarget.Id
            };
            var ancestor2 = new HierarchyNode
            {
                Id = 11,
                LeftId = 1,
                RightId = 13,
                TargetId = testTarget.Id
            };

            var mockHierarchyDataProvider = new Mock<IHierarchyDataProvider>();
            mockHierarchyDataProvider.Setup(p => p.GetAncestors(It.IsAny<HierarchyEntry>(), It.IsAny<HierarchyNode>(), true, true))
                .Returns(new List<HierarchyNode> { ancestor2, ancestor1, node });
            var mockHierarchyEntryRepository = new Mock<IHierarchyEntryRepository>();
            var mockTargetEntryRepository = new Mock<ITargetEntryRepository>();
            var mockTargetRepository = new Mock<ITargetRepository>();
            var mockTargetTypes = new List<Type>();
            var service = new HierarchyService(mockHierarchyDataProvider.Object, mockHierarchyEntryRepository.Object, mockTargetEntryRepository.Object, mockTargetRepository.Object, mockTargetTypes);

            // act
            var resultNode = service.GetAncestors(hierarchyEntry, node, true, true);

            // assert
            Assert.That(resultNode, Is.Not.Null);
            Assert.That(resultNode.Count, Is.EqualTo(3));
            Assert.That(resultNode[0].Id, Is.EqualTo(ancestor2.Id));
            Assert.That(resultNode[0].LeftId, Is.EqualTo(ancestor2.LeftId));
            Assert.That(resultNode[0].RightId, Is.EqualTo(ancestor2.RightId));
            Assert.That(resultNode[0].TargetId, Is.EqualTo(ancestor2.TargetId));
            Assert.That(resultNode[1].Id, Is.EqualTo(ancestor1.Id));
            Assert.That(resultNode[1].LeftId, Is.EqualTo(ancestor1.LeftId));
            Assert.That(resultNode[1].RightId, Is.EqualTo(ancestor1.RightId));
            Assert.That(resultNode[1].TargetId, Is.EqualTo(ancestor1.TargetId));
            Assert.That(resultNode[2].Id, Is.EqualTo(node.Id));
            Assert.That(resultNode[2].LeftId, Is.EqualTo(node.LeftId));
            Assert.That(resultNode[2].RightId, Is.EqualTo(node.RightId));
            Assert.That(resultNode[2].TargetId, Is.EqualTo(node.TargetId));

            mockHierarchyDataProvider.Verify(p => p.GetAncestors(It.IsAny<HierarchyEntry>(), It.IsAny<HierarchyNode>(), true, true));
        }