public void TestClientControllerDoesNotAddClientWhenClientExists()
{
clientRepoMocked.Setup(x => x.FindByUsername("ExistingClient")).Returns(() => new Client());
ClientController controller = new ClientController(clientRepoMocked.Object);
ClientViewModel client = new ClientViewModel()
{
Username = "******",
Password = "******"
};
controller.AddOrEdit(client);
Assert.AreEqual(nrCurrentClienti, nrInitialClienti);
}