public void TestPut()
 {
     const int contactId = 3;
     const string contactName = "Updated contact";
     Contact updatedContact = new Contact { Id = contactId, Name = contactName, Email = "*****@*****.**", Phone = "555-7777" };
     ContactsController controller = new ContactsController(_repository);
     JsonResult result = controller.Put(contactId, updatedContact) as JsonResult;
     result = controller.Get(contactId) as JsonResult;
     Contact contact = result.Data as Contact;
     Assert.AreEqual(contactName, contact.Name);
 }