public void Execute_WhenUserNotExist_ThrowAnException()
{
string existingUser = "******";
string nonExistingUser = "******";
var userRepository = new Mock <IUserRepository>();
userRepository.Setup(u => u.Get(existingUser)).Returns(It.IsAny <User>());
userRepository.Setup(u => u.Get(nonExistingUser)).Returns(() => null);
var command = new FollowUserCommand(userRepository.Object);
Assert.Throws(typeof(ArgumentException), () => command.Execute(existingUser, nonExistingUser));
Assert.Throws(typeof(ArgumentException), () => command.Execute(nonExistingUser, existingUser));
}
public void Execute_WhenCalled_AddAnUserToFollow()
{
var userNameA = "a";
var userNameB = "b";
var userA = new User {
Name = userNameA
};
var userB = new User {
Name = userNameB
};
var userRepository = new Mock <IUserRepository>();
userRepository.Setup(u => u.Get(userNameA)).Returns(userA);
userRepository.Setup(u => u.Get(userNameB)).Returns(userB);
var command = new FollowUserCommand(userRepository.Object);
command.Execute(userNameA, userNameB);
Assert.That(userA.FollowingUsers.Contains(userB));
}
