public void ShouldDoStuffWhenCommandExecutes()
{
var command = Substitute.For <ICommand>();
var watcher = new CommandWatcher(command);
command.Executed += Raise.Event();
Assert.That(watcher.DidStuff);
}
public void MakeSureWatcherSubscribesToCommandExecuted()
{
var command = Substitute.For <ICommand>();
var watcher = new CommandWatcher(command);
// Not recommended. Favour testing behaviour over implementation specifics.
// Can check subscription:
command.Received().Executed += watcher.OnExecuted;
// Or, if the handler is not accessible:
command.Received().Executed += Arg.Any <EventHandler>();
}