tests/web/native/foreign_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";

foreign1(var a, var b) {
  return JS("num", r"# + #", a, b);
}

var called = false;
callOnce() {
  Expect.isFalse(called);
  called = true;
  return 499;
}

foreign2() {
  var t = callOnce();
  return JS("num", r"# + #", t, t);
}

foreign11(a1, a2, a3, a4, a5, a6, a7, a8, a9, a10, a11) {
  return JS(
    "num|String",
    r"# + # + # + # + # + # + # + # + # + # + #",
    a1,
    a2,
    a3,
    a4,
    a5,
    a6,
    a7,
    a8,
    a9,
    a10,
    a11,
  );
}

void main() {
  Expect.equals(9, foreign1(4, 5));
  Expect.equals(998, foreign2());
  Expect.equals(
    '1234567891011',
    foreign11('1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11'),
  );
  // Ensure there will be isNaN and NaN variable names.
  var isNaN = called ? 42 : 44;
  var NaN = called ? 52 : 54;
  Expect.isFalse(JS('bool', 'self.isNaN(#)', isNaN));
  Expect.isFalse(JS('bool', 'self.isNaN(#)', NaN));
  Expect.isTrue(JS('bool', 'self.isNaN(#)', double.nan));
}