regress-2980.js 2.3 KB
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// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
//     * Neither the name of Google Inc. nor the names of its
//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.


function test(expected, holder) {
  assertEquals(expected, holder.property);
}

var holder = {}
holder.__proto__ = null;
holder.property = "foo";
delete holder.property;
test(undefined, holder);
test(undefined, holder);
test(undefined, holder);
holder.property = "bar";
test("bar", holder);
test("bar", holder);

// Now the same thing with a nontrivial prototype chain.

function test2(expected, holder) {
  assertEquals(expected, holder.prop2);
}

var holder2 = {}
holder2.prop2 = "foo";
holder2.__proto__ = null;
function Receiver() {}
Receiver.prototype = holder2;

var rec2 = new Receiver();
delete holder2.prop2;

test2(undefined, rec2);
test2(undefined, rec2);
test2(undefined, rec2);
holder2.prop2 = "bar";
test2("bar", rec2);
test2("bar", rec2);