public void Login_UserExist_CommandPassed()
{
const string EXISTING_USER = "******";
IUserRepository fakeUserRepository = A.Fake<IUserRepository>();
var fakeLogin = A.Fake<ILoginActions>();
A.CallTo(() => fakeUserRepository.IsExists(EXISTING_USER)).Returns(true);
List<string> parameters = new List<string> { EXISTING_USER };
var login = new Login(fakeUserRepository, fakeLogin, parameters);
Assert.AreEqual(true, login.CanExecute());
Assert.AreEqual("OK", login.Execute());
}
