v8/test/mjsunit/for-in-special-cases.js
whesse@chromium.org 9991a4b226 Fix issue 785. For-in now works on strings: for (var i in "asdf") now works
all the time, not just the first time it is run.
Review URL: http://codereview.chromium.org/3037008

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@5095 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2010-07-19 12:45:21 +00:00

122 lines
3.7 KiB
JavaScript

// Copyright 2008 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.
// Flags: --expose-gc
function for_in_null() {
try {
for (var x in null) {
return false;
}
} catch(e) {
return false;
}
return true;
}
function for_in_undefined() {
try {
for (var x in undefined) {
return false;
}
} catch(e) {
return false;
}
return true;
}
for (var i = 0; i < 10; ++i) {
assertTrue(for_in_null());
gc();
}
for (var j = 0; j < 10; ++j) {
assertTrue(for_in_undefined());
gc();
}
assertEquals(10, i);
assertEquals(10, j);
function Accumulate(x) {
var accumulator = "";
for (var i in x) {
accumulator += i;
}
return accumulator;
}
for (var i = 0; i < 3; ++i) {
var elements = Accumulate("abcd");
// We do not assume that for-in enumerates elements in order.
assertTrue(-1 != elements.indexOf("0"));
assertTrue(-1 != elements.indexOf("1"));
assertTrue(-1 != elements.indexOf("2"));
assertTrue(-1 != elements.indexOf("3"));
assertEquals(4, elements.length);
}
function for_in_string_prototype() {
var x = new String("abc");
x.foo = 19;
function B() {
this.bar = 5;
this[7] = 4;
}
B.prototype = x;
var y = new B();
y.gub = 13;
var elements = Accumulate(y);
var elements1 = Accumulate(y);
// If for-in returns elements in a different order on multiple calls, this
// assert will fail. If that happens, consider if that behavior is OK.
assertEquals(elements, elements1, "For-in elements not the same both times.");
// We do not assume that for-in enumerates elements in order.
assertTrue(-1 != elements.indexOf("0"));
assertTrue(-1 != elements.indexOf("1"));
assertTrue(-1 != elements.indexOf("2"));
assertTrue(-1 != elements.indexOf("7"));
assertTrue(-1 != elements.indexOf("foo"));
assertTrue(-1 != elements.indexOf("bar"));
assertTrue(-1 != elements.indexOf("gub"));
assertEquals(13, elements.length);
elements = Accumulate(x);
assertTrue(-1 != elements.indexOf("0"));
assertTrue(-1 != elements.indexOf("1"));
assertTrue(-1 != elements.indexOf("2"));
assertTrue(-1 != elements.indexOf("foo"));
assertEquals(6, elements.length);
}
for_in_string_prototype();
for_in_string_prototype();