v8/test/mjsunit/array-splice.js

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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 splice, shift, unshift, slice and join on small
* and large arrays. Some of these methods are specified such that they
* should work on other objects too, so we test that too.
*/
var LARGE = 40000000;
var VERYLARGE = 4000000000;
// Nicer for firefox 1.5. Unless you uncomment the following two lines,
// smjs will appear to hang on this file.
//var LARGE = 40000;
//var VERYLARGE = 40000;
var fourhundredth = LARGE/400;
function PseudoArray() {
};
for (var use_real_arrays = 0; use_real_arrays <= 1; use_real_arrays++) {
var poses = [0, 140, 20000, VERYLARGE];
var the_prototype;
var new_function;
var push_function;
var concat_function;
var slice_function;
var splice_function;
var splice_function_2;
var unshift_function;
var unshift_function_2;
var shift_function;
if (use_real_arrays) {
new_function = function(length) {
return new Array(length);
};
the_prototype = Array.prototype;
push_function = function(array, elt) {
return array.push(elt);
};
concat_function = function(array, other) {
return array.concat(other);
};
slice_function = function(array, start, len) {
return array.slice(start, len);
};
splice_function = function(array, start, len) {
return array.splice(start, len);
};
splice_function_2 = function(array, start, len, elt) {
return array.splice(start, len, elt);
};
unshift_function = function(array, elt) {
return array.unshift(elt);
};
unshift_function_2 = function(array, elt1, elt2) {
return array.unshift(elt1, elt2);
};
shift_function = function(array) {
return array.shift();
};
} else {
// Don't run largest size on non-arrays or we'll be here for ever.
poses.pop();
new_function = function(length) {
var obj = new PseudoArray();
obj.length = length;
return obj;
};
the_prototype = PseudoArray.prototype;
push_function = function(array, elt) {
array[array.length] = elt;
array.length++;
};
concat_function = function(array, other) {
return Array.prototype.concat.call(array, other);
};
slice_function = function(array, start, len) {
return Array.prototype.slice.call(array, start, len);
};
splice_function = function(array, start, len) {
return Array.prototype.splice.call(array, start, len);
};
splice_function_2 = function(array, start, len, elt) {
return Array.prototype.splice.call(array, start, len, elt);
};
unshift_function = function(array, elt) {
return Array.prototype.unshift.call(array, elt);
};
unshift_function_2 = function(array, elt1, elt2) {
return Array.prototype.unshift.call(array, elt1, elt2);
};
shift_function = function(array) {
return Array.prototype.shift.call(array);
};
}
for (var pos_pos = 0; pos_pos < poses.length; pos_pos++) {
var pos = poses[pos_pos];
if (pos > 100) {
var a = new_function(pos);
assertEquals(pos, a.length);
push_function(a, 'foo');
assertEquals(pos + 1, a.length);
var b = ['bar'];
// Delete a huge number of holes.
var c = splice_function(a, 10, pos - 20);
assertEquals(pos - 20, c.length);
assertEquals(21, a.length);
}
// Add a numeric property to the prototype of the array class. This
// allows us to test some borderline stuff relative to the standard.
the_prototype["" + (pos + 1)] = 'baz';
if (use_real_arrays) {
// It seems quite clear from ECMAScript spec 15.4.4.5. Just call Get on
// every integer in the range.
// IE, Safari get this right.
// FF, Opera get this wrong.
var a = ['zero', ,'two'];
if (pos == 0) {
assertEquals("zero,baz,two", a.join(","));
}
// Concat only applies to real arrays, unlike most of the other methods.
var a = new_function(pos);
push_function(a, "con");
assertEquals("con", a[pos]);
assertEquals(pos + 1, a.length);
var b = new_function(0);
push_function(b, "cat");
assertEquals("cat", b[0]);
var ab = concat_function(a, b);
assertEquals("con", ab[pos]);
assertEquals(pos + 2, ab.length);
assertEquals("cat", ab[pos + 1]);
var ba = concat_function(b, a);
assertEquals("con", ba[pos + 1]);
assertEquals(pos + 2, ba.length);
assertEquals("cat", ba[0]);
// Join with '' as separator.
var join = a.join('');
assertEquals("con", join);
join = b.join('');
assertEquals("cat", join);
join = ab.join('');
assertEquals("concat", join);
join = ba.join('');
assertEquals("catcon", join);
var sparse = [];
sparse[pos + 1000] = 'is ';
sparse[pos + 271828] = 'time ';
sparse[pos + 31415] = 'the ';
sparse[pos + 012260199] = 'all ';
sparse[-1] = 'foo';
sparse[pos + 22591927] = 'good ';
sparse[pos + 1618033] = 'for ';
sparse[pos + 91] = ': Now ';
sparse[pos + 86720199] = 'men.';
sparse.hest = 'fisk';
assertEquals("baz: Now is the time for all good men.", sparse.join(''));
}
a = new_function(pos);
push_function(a, 'zero');
push_function(a, void 0);
push_function(a, 'two');
// Splice works differently from join.
// IE, Safari get this wrong.
// FF, Opera get this right.
// 15.4.4.12 line 24 says the object itself has to have the property...
var zero = splice_function(a, pos, 1);
assertEquals("undefined", typeof(a[pos]));
assertEquals("two", a[pos+1], "pos1:" + pos);
assertEquals(pos + 2, a.length, "a length");
assertEquals(1, zero.length, "zero length");
assertEquals("zero", zero[0]);
// 15.4.4.12 line 41 says the object itself has to have the property...
a = new_function(pos);
push_function(a, 'zero');
push_function(a, void 0);
push_function(a, 'two');
var nothing = splice_function_2(a, pos, 0, 'minus1');
assertEquals("minus1", a[pos]);
assertEquals("zero", a[pos+1]);
assertEquals("undefined", typeof(a[pos+2]), "toot!");
assertEquals("two", a[pos+3], "pos3");
assertEquals(pos + 4, a.length);
assertEquals(1, zero.length);
assertEquals("zero", zero[0]);
// 15.4.4.12 line 10 says the object itself has to have the property...
a = new_function(pos);
push_function(a, 'zero');
push_function(a, void 0);
push_function(a, 'two');
var one = splice_function(a, pos + 1, 1);
assertEquals("", one.join(","));
assertEquals(pos + 2, a.length);
assertEquals("zero", a[pos]);
assertEquals("two", a[pos+1]);
// Set things back to the way they were.
the_prototype[pos + 1] = undefined;
// Unshift.
var a = new_function(pos);
push_function(a, "foo");
assertEquals("foo", a[pos]);
assertEquals(pos + 1, a.length);
unshift_function(a, "bar");
assertEquals("foo", a[pos+1]);
assertEquals(pos + 2, a.length);
assertEquals("bar", a[0]);
unshift_function_2(a, "baz", "boo");
assertEquals("foo", a[pos+3]);
assertEquals(pos + 4, a.length);
assertEquals("baz", a[0]);
assertEquals("boo", a[1]);
assertEquals("bar", a[2]);
// Shift.
var baz = shift_function(a);
assertEquals("baz", baz);
assertEquals("boo", a[0]);
assertEquals(pos + 3, a.length);
assertEquals("foo", a[pos + 2]);
// Slice.
var bar = slice_function(a, 1, 0); // don't throw an exception please.
bar = slice_function(a, 1, 2);
assertEquals("bar", bar[0]);
assertEquals(1, bar.length);
assertEquals("bar", a[1]);
}
}
// Lets see if performance is reasonable.
var a = new Array(LARGE + 10);
for (var i = 0; i < a.length; i += 1000) {
a[i] = i;
}
// Take something near the end of the array.
for (var i = 0; i < 100; i++) {
var top = a.splice(LARGE, 5);
assertEquals(5, top.length);
assertEquals(LARGE, top[0]);
assertEquals("undefined", typeof(top[1]));
assertEquals(LARGE + 5, a.length);
a.splice(LARGE, 0, LARGE);
a.length = LARGE + 10;
}
var a = new Array(LARGE + 10);
for (var i = 0; i < a.length; i += fourhundredth) {
a[i] = i;
}
// Take something near the middle of the array.
for (var i = 0; i < 10; i++) {
var top = a.splice(LARGE >> 1, 5);
assertEquals(5, top.length);
assertEquals(LARGE >> 1, top[0]);
assertEquals("undefined", typeof(top[1]));
assertEquals(LARGE + 5, a.length);
a.splice(LARGE >> 1, 0, LARGE >> 1, void 0, void 0, void 0, void 0);
}
// Test http://b/issue?id=1202711
arr = [0];
arr.length = 2;
Array.prototype[1] = 1;
assertEquals(1, arr.pop());
assertEquals(0, arr.pop());
Array.prototype[1] = undefined;
// Test http://code.google.com/p/chromium/issues/detail?id=21860
Array.prototype.push.apply([], [1].splice(0, -(-1 % 5)));