public void RepositoryCalledWhenGetUserMessageInvoked()
{
string userName = "******";
subject.GetUserMessages(userName);
mockRespository.Verify(x => x.GetMessages(userName), Times.Once);
}
public void ReturnsNoMessagesWhenForUnknownUsernameEntered()
{
mockRespository.Setup(x => x.GetMessages(It.IsAny <string>())).Returns(new List <Message>());
subject = new MessagePoster(mockRespository.Object);
var messages = subject.GetUserMessages("joe bloggs");
Assert.AreEqual(0, messages.Count);
}