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// 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.
/**
* @fileoverview Test concat on small and large arrays
*/
var poses = [140, 4000000000];
while (pos = poses.shift()) {
var a = new Array(pos);
assertEquals(pos, a.length);
a.push('foo');
assertEquals(pos + 1, a.length);
var b = ['bar'];
var c = a.concat(b);
assertEquals(pos + 2, c.length);
assertEquals("undefined", typeof(c[pos - 1]));
assertEquals("foo", c[pos]);
assertEquals("bar", c[pos + 1]);
// Can we fool the system by putting a number in a string?
var onetwofour = "124";
a[onetwofour] = 'doo';
assertEquals(a[124], 'doo');
c = a.concat(b);
assertEquals(c[124], 'doo');
// If we put a number in the prototype, then the spec says it should be
// copied on concat.
Array.prototype["123"] = 'baz';
assertEquals(a[123], 'baz');
c = a.concat(b);
assertEquals(pos + 2, c.length);
assertEquals("baz", c[123]);
assertEquals("undefined", typeof(c[pos - 1]));
assertEquals("foo", c[pos]);
assertEquals("bar", c[pos + 1]);
// When we take the number off the prototype it disappears from a, but
// the concat put it in c itself.
Array.prototype["123"] = undefined;
assertEquals("undefined", typeof(a[123]));
assertEquals("baz", c[123]);
// If the element of prototype is shadowed, the element on the instance
// should be copied, but not the one on the prototype.
Array.prototype[123] = 'baz';
a[123] = 'xyz';
assertEquals('xyz', a[123]);
c = a.concat(b);
assertEquals('xyz', c[123]);
// Non-numeric properties on the prototype or the array shouldn't get
// copied.
Array.prototype.moe = 'joe';
a.ben = 'jerry';
assertEquals(a["moe"], 'joe');
assertEquals(a["ben"], 'jerry');
c = a.concat(b);
// ben was not copied
assertEquals("undefined", typeof(c.ben));
// moe was not copied, but we can see it through the prototype
assertEquals("joe", c.moe);
// When we take moe off the prototype it disappears from all arrays.
Array.prototype.moe = undefined;
assertEquals("undefined", typeof(c.moe));
// Negative indeces don't get concated.
a[-1] = 'minus1';
assertEquals("minus1", a[-1]);
assertEquals("undefined", typeof(a[0xffffffff]));
c = a.concat(b);
assertEquals("undefined", typeof(c[-1]));
assertEquals("undefined", typeof(c[0xffffffff]));
assertEquals(c.length, a.length + 1);
}
a = [];
c = a.concat('Hello');
assertEquals(1, c.length);
assertEquals("Hello", c[0]);
assertEquals("Hello", c.toString());
// Check that concat preserves holes.
var holey = [void 0,'a',,'c'].concat(['d',,'f',[0,,2],void 0])
assertEquals(9, holey.length); // hole in embedded array is ignored
for (var i = 0; i < holey.length; i++) {
if (i == 2 || i == 5) {
assertFalse(i in holey);
} else {
assertTrue(i in holey);
}
}
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