public void XmlParsedAndSaved()
{
var repository = new Mock<ISaveGraphRepository>();
var service = new StorageService(repository.Object);
var node1 = new {Id = 123, Label = "qweqwe"};
var node2 = new {Id = 456, Label = "asdasd"};
var root = new XElement("nodes",
new XElement("node", new XElement("id", node1.Id), new XElement("label", node1.Label)),
new XElement("node", new XElement("id", node2.Id), new XElement("label", node2.Label))
);
service.SaveGraph(root);
repository.Verify(x => x.Save(It.IsAny<NodeEntity>()), Times.Exactly(2), "Nodes should get saved to the database");
repository.Verify(x => x.Save(It.Is<NodeEntity>(xx => xx.Id == node1.Id && xx.Label == node1.Label)), Times.Once, "Nodes should get saved to the database");
repository.Verify(x => x.Save(It.Is<NodeEntity>(xx => xx.Id == node2.Id && xx.Label == node2.Label)), Times.Once, "Nodes should get saved to the database");
}