tests/compiler/dart2js_native/native_class_inheritance1_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.

// Version 1: It might be possible to call foo directly.
@Native("A1")
class A1 {
  foo() native;
}

@Native("B1")
class B1 extends A1 {
  foo() native;
}

makeA1() native;
makeB1() native;

// Version 2: foo needs some kind of trampoline.
@Native("A2")
class A2 {
  foo([a = 99]) native;
}

@Native("B2")
class B2 extends A2 {
  foo([z = 1000]) native;
}

makeA2() native;
makeB2() native;

void setup() {
  JS('', r"""
(function(){
  // This code is inside 'setup' and so not accessible from the global scope.
  function inherits(child, parent) {
    if (child.prototype.__proto__) {
      child.prototype.__proto__ = parent.prototype;
    } else {
      function tmp() {};
      tmp.prototype = parent.prototype;
      child.prototype = new tmp();
      child.prototype.constructor = child;
    }
  }
  function A1(){}
  function B1(){}
  inherits(B1, A1);
  A1.prototype.foo = function(){return 100;};
  B1.prototype.foo = function(){return 200;};

  makeA1 = function(){return new A1()};
  makeB1 = function(){return new B1()};

  function A2(){}
  function B2(){}
  inherits(B2, A2);
  A2.prototype.foo = function(a){return a + 10000;};
  B2.prototype.foo = function(z){return z + 20000;};

  makeA2 = function(){return new A2()};
  makeB2 = function(){return new B2()};

  self.nativeConstructor(A1);
  self.nativeConstructor(A2);
  self.nativeConstructor(B1);
  self.nativeConstructor(B2);
})()""");
}

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

  var a1 = makeA1();
  var b1 = makeB1();
  Expect.equals(100, a1.foo());
  Expect.equals(200, b1.foo());

  var a2 = makeA2();
  var b2 = makeB2();
  Expect.equals(10000 + 99, a2.foo());
  Expect.equals(20000 + 1000, b2.foo());

  Expect.equals(10000 + 1, a2.foo(1));
  Expect.equals(20000 + 2, b2.foo(2));

  bool caught = false;
  try {
    a1.foo(20);
  } catch (ex) {
    caught = true;
    Expect.isTrue(ex is NoSuchMethodError);
  }
  Expect.isTrue(caught, 'a1.foo(20) should throw');

  caught = false;
  try {
    var x = 123;
    x.foo(20);
  } catch (ex) {
    caught = true;
    Expect.isTrue(ex is NoSuchMethodError);
  }
  Expect.isTrue(caught, "x.foo(20) should throw");
}