tests/web/native/native_class_inheritance2_frog_test.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.

import "native_testing.dart";

// Test to see if resolving a hidden native class's method interferes with
// subsequent resolving the subclass's method.  This might happen if the
// superclass caches the method in the prototype, so shadowing the dispatcher
// stored on Object.prototype.

@Native("A")
class A {
  foo([a = 100]) native;
}

@Native("B")
class B extends A {}

@Native("C")
class C extends B {
  foo([z = 300]) native;
}

@Native("D")
class D extends C {}

makeA() native;
makeB() native;
makeC() native;
makeD() native;

void setup() {
  JS('', r"""
(function(){
  // This code is inside 'setup' and so not accessible from the global scope.
  function inherits(child, parent) {
    if (Object.getPrototypeOf(child.prototype)) {
      Object.setPrototypeOf(child.prototype, parent.prototype);
    } else {
      function tmp() {};
      tmp.prototype = parent.prototype;
      child.prototype = new tmp();
      child.prototype.constructor = child;
    }
  }

  function A(){}
  function B(){}
  inherits(B, A);
  function C(){}
  inherits(C, B);
  function D(){}
  inherits(D, C);

  A.prototype.foo = function(a){return 'A.foo(' + a + ')'};
  C.prototype.foo = function(z){return 'C.foo(' + z + ')'};

  self.makeA = function(){return new A()};
  self.makeB = function(){return new B()};
  self.makeC = function(){return new C()};
  self.makeD = function(){return new D()};

  self.nativeConstructor(A);
  self.nativeConstructor(B);
  self.nativeConstructor(C);
  self.nativeConstructor(D);
})()""");
  applyTestExtensions(['A', 'B', 'C', 'D']);
}

main() {
  nativeTesting();
  setup();

  var a = makeA();
  var b = makeB();
  var c = makeC();
  var d = makeD();

  Expect.equals('A.foo(100)', b.foo());
  Expect.equals('C.foo(300)', d.foo());
  // If the above line fails with C.foo(100) then the dispatch to fill in the
  // default got the wrong one, followed by a second dispatch that resolved to
  // the correct native method.

  Expect.equals('A.foo(1)', a.foo(1));
  Expect.equals('A.foo(2)', b.foo(2));
  Expect.equals('C.foo(3)', c.foo(3));
  Expect.equals('C.foo(4)', d.foo(4));
}