v8/test/mjsunit/regress/regress-70066.js

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// Copyright 2011 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.
// Regression test for Chromium issue 70066. Delete should work properly
// from inside 'with' scopes.
// http://code.google.com/p/chromium/issues/detail?id=70066
x = 0;
// Delete on a slot from a function's own context.
function test1() {
var value = 1;
var status;
with ({}) { status = delete value; }
return value + ":" + status;
}
assertEquals("1:false", test1(), "test1");
assertEquals(0, x, "test1"); // Global x is undisturbed.
// Delete on a slot from an outer context.
function test2() {
function f() {
with ({}) { return delete value; }
}
var value = 2;
var status = f();
return value + ":" + status;
}
assertEquals("2:false", test2(), "test2");
assertEquals(0, x, "test2"); // Global x is undisturbed.
// Delete on an argument. This hits the same code paths as test5 because
// 'with' forces all parameters to be indirected through the arguments
// object.
function test3(value) {
var status;
with ({}) { status = delete value; }
return value + ":" + status;
}
assertEquals("undefined:true", test3(3), "test3");
assertEquals(0, x, "test3"); // Global x is undisturbed.
// Delete on an argument from an outer context. This hits the same code
// path as test2.
function test4(value) {
function f() {
with ({}) { return delete value; }
}
var status = f();
return value + ":" + status;
}
assertEquals("4:false", test4(4), "test4");
assertEquals(0, x, "test4"); // Global x is undisturbed.
// Delete on an argument found in the arguments object. Such properties are
// normally DONT_DELETE in JavaScript but deletion is allowed by V8.
function test5(value) {
var status;
with ({}) { status = delete value; }
return arguments[0] + ":" + status;
}
assertEquals("undefined:true", test5(5), "test5");
assertEquals(0, x, "test5"); // Global x is undisturbed.
function test6(value) {
function f() {
with ({}) { return delete value; }
}
var status = f();
return arguments[0] + ":" + status;
}
assertEquals("undefined:true", test6(6), "test6");
assertEquals(0, x, "test6"); // Global x is undisturbed.
// Delete on a property found on 'with' object.
function test7(object) {
with (object) { return delete value; }
}
var o = {value: 7};
assertEquals(true, test7(o), "test7");
assertEquals(void 0, o.value, "test7");
assertEquals(0, x, "test7"); // Global x is undisturbed.
// Delete on a global property.
function test8() {
with ({}) { return delete x; }
}
assertEquals(true, test8(), "test8");
assertThrows("x", "test8"); // Global x should be deleted.
// Delete on a property that is not found anywhere.
function test9() {
with ({}) { return delete x; }
}
assertThrows("x", "test9"); // Make sure it's not there.
assertEquals(true, test9(), "test9");
// Delete on a DONT_DELETE property of the global object.
var y = 10;
function test10() {
with ({}) { return delete y; }
}
assertEquals(false, test10(), "test10");
assertEquals(10, y, "test10");