void Start()
{
// Initializing of delegate
// <delegate-type> <name> = <name-of-method>
DelegateExample myDelegate = Bar;
myDelegate.Invoke(5);
// Use another class
Foobar(Foo);
}
static void DelegeteInAction()
{
DelegateExample delExE1 = Hello; // reference
DelegateExampleWithStr delExE2; // null
delExE2 = null; // null
delExE1.Invoke();
delExE2?.Invoke("Ping pong"); // nothing
delExE2 = HelloUser; // reference
delExE2?.Invoke("Batman"); // write in console "Hello, Batman"
}
public void Activate_Code()
{
// Act
DelegateExample example1 = Hello;
DelegateExampleWithParam example2 = null;
DelegateExample example3 = null;
//DelegateExample example4 = HelloUser; not allowed operation
// Action
var example1Exception = Record.Exception(() => example1.Invoke());
var example2Exception = Record.Exception(() => example2?.Invoke("Ping pong"));
// Assert
Assert.Null(example1Exception);
Assert.Null(example2Exception);
Assert.Throws <NullReferenceException>(() => example3.Invoke());
}