public UserGreetings(IGreetingSender greetingSender)
{
if (greetingSender == null)
{
throw new ArgumentNullException(nameof(greetingSender));
}
this.greetingSender = greetingSender;
}
public void PerTestSetup()
{
greetingSender = Substitute.For <IGreetingSender>();
sut = new UserGreetings(greetingSender);
}
