public void Create()
{
int oldCount = Entities.Count();
int newId = oldCount + 1;
var entity = CreateTestEntity(newId);
var result = _controller.Create(entity);
Assert.AreEqual(HttpStatusCode.Created, result.StatusCode,
"Create action with valid model should result in Created");
Assert.AreEqual(oldCount + 1, Entities.Count(), "Create action should add new entity");
var savedEntity = Entities.SingleOrDefault(d => d.Id == newId);
Assert.IsNotNull(savedEntity, "Entity does not seem to be added");
Assert.IsTrue(entity.ToEntity().Equals(savedEntity), "Original and saved entities differ");
}