v8/test/mjsunit/array-pop.js
antonm@chromium.org e8e35eccac Properly process arrays with overridden prototype in various Array's functions.
Bailout to JS Array builtins if array's prototype is different from
Array.prototype.  Otherwise there might be inherited elements coming
from this prototype.

Review URL: http://codereview.chromium.org/2037008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@4649 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2010-05-12 12:22:09 +00:00

124 lines
4.8 KiB
JavaScript

// Copyright 2010 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.
// Check pops with various number of arguments.
(function() {
var a = [];
for (var i = 0; i < 7; i++) {
a = [7, 6, 5, 4, 3, 2, 1];
assertEquals(1, a.pop(), "1st pop");
assertEquals(6, a.length, "length 1st pop");
assertEquals(2, a.pop(1), "2nd pop");
assertEquals(5, a.length, "length 2nd pop");
assertEquals(3, a.pop(1, 2), "3rd pop");
assertEquals(4, a.length, "length 3rd pop");
assertEquals(4, a.pop(1, 2, 3), "4th pop");
assertEquals(3, a.length, "length 4th pop");
assertEquals(5, a.pop(), "5th pop");
assertEquals(2, a.length, "length 5th pop");
assertEquals(6, a.pop(), "6th pop");
assertEquals(1, a.length, "length 6th pop");
assertEquals(7, a.pop(), "7th pop");
assertEquals(0, a.length, "length 7th pop");
assertEquals(undefined, a.pop(), "8th pop");
assertEquals(0, a.length, "length 8th pop");
assertEquals(undefined, a.pop(1, 2, 3), "9th pop");
assertEquals(0, a.length, "length 9th pop");
}
// Check that pop works on inherited properties.
for (var i = 0; i < 10 ;i++) { // Ensure ICs are stabilized.
Array.prototype[1] = 1;
Array.prototype[3] = 3;
Array.prototype[5] = 5;
Array.prototype[7] = 7;
Array.prototype[9] = 9;
a = [0,1,2,,4,,6,7,8,,];
assertEquals(10, a.length, "inherit-initial-length");
for (var j = 9; j >= 0; j--) {
assertEquals(j + 1, a.length, "inherit-pre-length-" + j);
assertTrue(j in a, "has property " + j);
var own = a.hasOwnProperty(j);
var inherited = Array.prototype.hasOwnProperty(j);
assertEquals(j, a.pop(), "inherit-pop");
assertEquals(j, a.length, "inherit-post-length");
assertFalse(a.hasOwnProperty(j), "inherit-deleted-own-" + j);
assertEquals(inherited, Array.prototype.hasOwnProperty(j),
"inherit-not-deleted-inherited" + j);
}
Array.prototype.length = 0; // Clean-up.
}
// Check that pop works on inherited properties for
// arrays with array prototype.
for (var i = 0; i < 10 ;i++) { // Ensure ICs are stabilized.
var array_proto = [];
array_proto[1] = 1;
array_proto[3] = 3;
array_proto[5] = 5;
array_proto[7] = 7;
array_proto[9] = 9;
a = [0,1,2,,4,,6,7,8,,];
a.__proto__ = array_proto;
assertEquals(10, a.length, "array_proto-inherit-initial-length");
for (var j = 9; j >= 0; j--) {
assertEquals(j + 1, a.length, "array_proto-inherit-pre-length-" + j);
assertTrue(j in a, "array_proto-has property " + j);
var own = a.hasOwnProperty(j);
var inherited = array_proto.hasOwnProperty(j);
assertEquals(j, a.pop(), "array_proto-inherit-pop");
assertEquals(j, a.length, "array_proto-inherit-post-length");
assertFalse(a.hasOwnProperty(j), "array_proto-inherit-deleted-own-" + j);
assertEquals(inherited, array_proto.hasOwnProperty(j),
"array_proto-inherit-not-deleted-inherited" + j);
}
}
// Check that pop works on inherited properties for
// arrays with array prototype.
})();
// Test the case of not JSArray receiver.
// Regression test for custom call generators, see issue 684.
(function() {
var a = [];
for (var i = 0; i < 100; i++) a.push(i);
var x = {__proto__: a};
for (var i = 0; i < 100; i++) {
assertEquals(99 - i, x.pop(), i + 'th iteration');
}
})();