Language/12_Expressions/32_Type_Test_A03_t01.dart

/*
 * Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 * for details. All rights reserved. Use of this source code is governed by a
 * BSD-style license that can be found in the LICENSE file.
 */
/**
 * @assertion The is-expression e is! T is equivalent to !(e is T).
 * @description Checks that the is!-expression is evaluated correctly.
 * @author msyabro
 * @reviewer kaigorodov 
 */
import "../../Utils/expect.dart";

abstract class I {
  factory I() {return new C();}
}

class A {
  A() {}
}
class B extends A {}
class C extends B implements I {}

main() {
  Expect.isFalse(1 is ! int);
  Expect.isFalse(1.0 is ! double);
  Expect.isFalse("string" is ! String);
  Expect.isFalse(null is ! Object);
  Expect.isFalse(() {} is !Function);
  Expect.isFalse(new Object() is ! dynamic);

  Expect.isFalse(new I() is ! I);
  Expect.isFalse(new I() is ! A);
  Expect.isFalse(new I() is ! C);
  Expect.isFalse(new A() is ! A);
  Expect.isFalse(new B() is ! B);
  Expect.isFalse(new B() is ! A);
  Expect.isFalse(new C() is ! I);
  Expect.isFalse(new C() is ! A);
  Expect.isFalse(new C() is ! B);
  Expect.isFalse(new C() is ! C);

  Expect.isFalse(new I() is ! Object);
  Expect.isFalse(new A() is ! Object);
  Expect.isFalse(new B() is ! Object);
  Expect.isFalse(new C() is ! Object);

  Expect.isTrue(null is ! int);
  Expect.isTrue(1 is ! String);
  Expect.isTrue("" is ! List);

  Expect.isTrue(new A() is ! C);
  Expect.isTrue(new B() is ! C);
  Expect.isTrue(new A() is ! I);

}