51a888ff48
Review URL: https://codereview.chromium.org/12729014 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@14050 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
383 lines
12 KiB
JavaScript
383 lines
12 KiB
JavaScript
// Copyright 2010 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Check that splicing array of holes keeps it as array of holes
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(function() {
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for (var i = 0; i < 7; i++) {
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var array = new Array(10);
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var spliced = array.splice(1, 1, 'one', 'two');
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assertEquals(1, spliced.length);
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assertFalse(0 in spliced, "0 in spliced");
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assertEquals(11, array.length);
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assertFalse(0 in array, "0 in array");
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assertTrue(1 in array);
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assertTrue(2 in array);
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assertFalse(3 in array, "3 in array");
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}
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})();
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// Check various variants of empty array's splicing.
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(function() {
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for (var i = 0; i < 7; i++) {
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assertEquals([], [].splice(0, 0));
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assertEquals([], [].splice(1, 0));
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assertEquals([], [].splice(0, 1));
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assertEquals([], [].splice(-1, 0));
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}
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})();
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// Check that even if result array is empty, receiver gets sliced.
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(function() {
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for (var i = 0; i < 7; i++) {
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var a = [1, 2, 3];
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assertEquals([], a.splice(1, 0, 'a', 'b', 'c'));
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assertEquals([1, 'a', 'b', 'c', 2, 3], a);
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}
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})();
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// Check various forms of arguments omission.
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(function() {
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var array;
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for (var i = 0; i < 7; i++) {
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array = [1, 2, 3]
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assertEquals([], array.splice());
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assertEquals([1, 2, 3], array);
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// SpiderMonkey, TraceMonkey and JSC treat the case where no delete count is
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// given differently from when an undefined delete count is given.
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// This does not follow ECMA-262, but we do the same for
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// compatibility.
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array = [1, 2, 3]
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assertEquals([1, 2, 3], array.splice(0));
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assertEquals([], array);
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array = [1, 2, 3]
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assertEquals([1, 2, 3], array.splice(undefined));
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assertEquals([], array);
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array = [1, 2, 3]
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assertEquals([1, 2, 3], array.splice("foobar"));
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assertEquals([], array);
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array = [1, 2, 3]
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assertEquals([], array.splice(undefined, undefined));
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assertEquals([1, 2, 3], array);
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array = [1, 2, 3]
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assertEquals([], array.splice("foobar", undefined));
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assertEquals([1, 2, 3], array);
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array = [1, 2, 3]
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assertEquals([], array.splice(undefined, "foobar"));
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assertEquals([1, 2, 3], array);
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array = [1, 2, 3]
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assertEquals([], array.splice("foobar", "foobar"));
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assertEquals([1, 2, 3], array);
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}
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})();
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// Check variants of negatives and positive indices.
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(function() {
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var array, spliced;
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for (var i = 0; i < 7; i++) {
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(-100);
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assertEquals([], array);
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assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(-3);
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assertEquals([1, 2, 3, 4], array);
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assertEquals([5, 6, 7], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(4);
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assertEquals([1, 2, 3, 4], array);
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assertEquals([5, 6, 7], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(6);
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assertEquals([1, 2, 3, 4, 5, 6], array);
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assertEquals([7], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(7);
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assertEquals([1, 2, 3, 4, 5, 6, 7], array);
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assertEquals([], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(8);
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assertEquals([1, 2, 3, 4, 5, 6, 7], array);
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assertEquals([], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(100);
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assertEquals([1, 2, 3, 4, 5, 6, 7], array);
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assertEquals([], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(0, -100);
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assertEquals([1, 2, 3, 4, 5, 6, 7], array);
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assertEquals([], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(0, -3);
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assertEquals([1, 2, 3, 4, 5, 6, 7], array);
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assertEquals([], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(0, 4);
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assertEquals([5, 6, 7], array);
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assertEquals([1, 2, 3, 4], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(0, 6);
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assertEquals([7], array);
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assertEquals([1, 2, 3, 4, 5, 6], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(0, 7);
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assertEquals([], array);
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assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(0, 8);
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assertEquals([], array);
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assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
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array = [1, 2, 3, 4, 5, 6, 7];
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spliced = array.splice(0, 100);
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assertEquals([], array);
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assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
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// Some exotic cases.
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obj = { toString: function() { throw 'Exception'; } };
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// Throwing an exception in conversion:
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try {
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[1, 2, 3].splice(obj, 3);
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throw 'Should have thrown';
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} catch (e) {
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assertEquals('Exception', e);
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}
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try {
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[1, 2, 3].splice(0, obj, 3);
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throw 'Should have thrown';
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} catch (e) {
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assertEquals('Exception', e);
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}
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array = [1, 2, 3];
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array.splice(0, 3, obj);
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assertEquals(1, array.length);
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// Custom conversion:
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array = [1, 2, 3];
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spliced = array.splice({valueOf: function() { return 1; }},
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{toString: function() { return 2; }},
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'one', 'two');
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assertEquals([2, 3], spliced);
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assertEquals([1, 'one', 'two'], array);
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}
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})();
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// Nasty: modify the array in ToInteger.
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(function() {
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var array = [];
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var spliced;
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for (var i = 0; i < 13; i++) {
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bad_start = { valueOf: function() { array.push(2*i); return -1; } };
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bad_count = { valueOf: function() { array.push(2*i + 1); return 1; } };
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spliced = array.splice(bad_start, bad_count);
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// According to the spec (15.4.4.12), length is calculated before
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// performing ToInteger on arguments. However, v8 ignores elements
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// we add while converting, so we need corrective pushes.
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array.push(2*i); array.push(2*i + 1);
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if (i == 0) {
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assertEquals([], spliced); // Length was 0, nothing to get.
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assertEquals([0, 1], array);
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} else {
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// When we start splice, array is [0 .. 2*i - 1], so we get
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// as a result [2*i], this element is removed from the array,
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// but [2 * i, 2 * i + 1] are added.
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assertEquals([2 * i - 1], spliced);
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assertEquals(2 * i, array[i]);
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assertEquals(2 * i + 1, array[i + 1]);
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}
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}
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})();
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// Now check the case with array of holes and some elements on prototype.
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(function() {
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var len = 9;
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var at3 = "@3";
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var at7 = "@7";
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for (var i = 0; i < 7; i++) {
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var array = new Array(len);
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var array_proto = [];
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array_proto[3] = at3;
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array_proto[7] = at7;
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array.__proto__ = array_proto;
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var spliced = array.splice(2, 2, 'one', undefined, 'two');
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// Second hole (at index 3) of array turns into
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// value of Array.prototype[3] while copying.
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assertEquals([, at3], spliced);
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assertEquals([, , 'one', undefined, 'two', , , at7, at7, ,], array);
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// ... but array[3] and array[7] is actually a hole:
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assertTrue(delete array_proto[3]);
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assertEquals(undefined, array[3]);
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assertTrue(delete array_proto[7]);
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assertEquals(undefined, array[7]);
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// and now check hasOwnProperty
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assertFalse(array.hasOwnProperty(0), "array.hasOwnProperty(0)");
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assertFalse(array.hasOwnProperty(1), "array.hasOwnProperty(1)");
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assertTrue(array.hasOwnProperty(2));
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assertTrue(array.hasOwnProperty(3));
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assertTrue(array.hasOwnProperty(4));
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assertFalse(array.hasOwnProperty(5), "array.hasOwnProperty(5)");
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assertFalse(array.hasOwnProperty(6), "array.hasOwnProperty(6)");
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assertFalse(array.hasOwnProperty(7), "array.hasOwnProperty(7)");
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assertTrue(array.hasOwnProperty(8));
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assertFalse(array.hasOwnProperty(9), "array.hasOwnProperty(9)");
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// and now check couple of indices above length.
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assertFalse(array.hasOwnProperty(10), "array.hasOwnProperty(10)");
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assertFalse(array.hasOwnProperty(15), "array.hasOwnProperty(15)");
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assertFalse(array.hasOwnProperty(31), "array.hasOwnProperty(31)");
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assertFalse(array.hasOwnProperty(63), "array.hasOwnProperty(63)");
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assertFalse(array.hasOwnProperty(Math.pow(2, 32) - 2),
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"array.hasOwnProperty(Math.pow(2, 32) - 2)");
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}
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})();
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// Now check the case with array of holes and some elements on prototype.
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(function() {
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var len = 9;
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var at3 = "@3";
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var at7 = "@7";
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for (var i = 0; i < 7; i++) {
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var array = new Array(len);
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Array.prototype[3] = at3;
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Array.prototype[7] = at7;
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var spliced = array.splice(2, 2, 'one', undefined, 'two');
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// Second hole (at index 3) of array turns into
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// value of Array.prototype[3] while copying.
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assertEquals([, at3], spliced);
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assertEquals([, , 'one', undefined, 'two', , , at7, at7, ,], array);
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// ... but array[3] and array[7] is actually a hole:
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assertTrue(delete Array.prototype[3]);
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assertEquals(undefined, array[3]);
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assertTrue(delete Array.prototype[7]);
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assertEquals(undefined, array[7]);
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// and now check hasOwnProperty
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assertFalse(array.hasOwnProperty(0), "array.hasOwnProperty(0)");
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assertFalse(array.hasOwnProperty(1), "array.hasOwnProperty(1)");
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assertTrue(array.hasOwnProperty(2));
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assertTrue(array.hasOwnProperty(3));
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assertTrue(array.hasOwnProperty(4));
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assertFalse(array.hasOwnProperty(5), "array.hasOwnProperty(5)");
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assertFalse(array.hasOwnProperty(6), "array.hasOwnProperty(6)");
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assertFalse(array.hasOwnProperty(7), "array.hasOwnProperty(7)");
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assertTrue(array.hasOwnProperty(8));
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assertFalse(array.hasOwnProperty(9), "array.hasOwnProperty(9)");
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// and now check couple of indices above length.
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assertFalse(array.hasOwnProperty(10), "array.hasOwnProperty(10)");
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assertFalse(array.hasOwnProperty(15), "array.hasOwnProperty(15)");
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assertFalse(array.hasOwnProperty(31), "array.hasOwnProperty(31)");
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assertFalse(array.hasOwnProperty(63), "array.hasOwnProperty(63)");
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assertFalse(array.hasOwnProperty(Math.pow(2, 32) - 2),
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"array.hasOwnProperty(Math.pow(2, 32) - 2)");
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}
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})();
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// Check the case of JS builtin .splice()
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(function() {
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for (var i = 0; i < 7; i++) {
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var array = [1, 2, 3, 4];
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Array.prototype[3] = 'foo'; // To force JS builtin.
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var spliced = array.splice();
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assertEquals([], spliced);
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assertEquals([1, 2, 3, 4], array);
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}
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})();
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// Check the behaviour when approaching maximal values for length.
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(function() {
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for (var i = 0; i < 7; i++) {
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try {
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new Array(Math.pow(2, 32) - 3).splice(-1, 0, 1, 2, 3, 4, 5);
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throw 'Should have thrown RangeError';
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} catch (e) {
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assertTrue(e instanceof RangeError);
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}
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// Check smi boundary
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var bigNum = (1 << 30) - 3;
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var array = new Array(bigNum);
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array.splice(-1, 0, 1, 2, 3, 4, 5, 6, 7);
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assertEquals(bigNum + 7, array.length);
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}
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})();
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(function() {
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for (var i = 0; i < 7; i++) {
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var a = [7, 8, 9];
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a.splice(0, 0, 1, 2, 3, 4, 5, 6);
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assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9], a);
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assertFalse(a.hasOwnProperty(10), "a.hasOwnProperty(10)");
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assertEquals(undefined, a[10]);
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}
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})();
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