v8/test/mjsunit/array-splice.js
2013-03-22 15:08:30 +00:00

383 lines
12 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 that splicing array of holes keeps it as array of holes
(function() {
for (var i = 0; i < 7; i++) {
var array = new Array(10);
var spliced = array.splice(1, 1, 'one', 'two');
assertEquals(1, spliced.length);
assertFalse(0 in spliced, "0 in spliced");
assertEquals(11, array.length);
assertFalse(0 in array, "0 in array");
assertTrue(1 in array);
assertTrue(2 in array);
assertFalse(3 in array, "3 in array");
}
})();
// Check various variants of empty array's splicing.
(function() {
for (var i = 0; i < 7; i++) {
assertEquals([], [].splice(0, 0));
assertEquals([], [].splice(1, 0));
assertEquals([], [].splice(0, 1));
assertEquals([], [].splice(-1, 0));
}
})();
// Check that even if result array is empty, receiver gets sliced.
(function() {
for (var i = 0; i < 7; i++) {
var a = [1, 2, 3];
assertEquals([], a.splice(1, 0, 'a', 'b', 'c'));
assertEquals([1, 'a', 'b', 'c', 2, 3], a);
}
})();
// Check various forms of arguments omission.
(function() {
var array;
for (var i = 0; i < 7; i++) {
array = [1, 2, 3]
assertEquals([], array.splice());
assertEquals([1, 2, 3], array);
// SpiderMonkey, TraceMonkey and JSC treat the case where no delete count is
// given differently from when an undefined delete count is given.
// This does not follow ECMA-262, but we do the same for
// compatibility.
array = [1, 2, 3]
assertEquals([1, 2, 3], array.splice(0));
assertEquals([], array);
array = [1, 2, 3]
assertEquals([1, 2, 3], array.splice(undefined));
assertEquals([], array);
array = [1, 2, 3]
assertEquals([1, 2, 3], array.splice("foobar"));
assertEquals([], array);
array = [1, 2, 3]
assertEquals([], array.splice(undefined, undefined));
assertEquals([1, 2, 3], array);
array = [1, 2, 3]
assertEquals([], array.splice("foobar", undefined));
assertEquals([1, 2, 3], array);
array = [1, 2, 3]
assertEquals([], array.splice(undefined, "foobar"));
assertEquals([1, 2, 3], array);
array = [1, 2, 3]
assertEquals([], array.splice("foobar", "foobar"));
assertEquals([1, 2, 3], array);
}
})();
// Check variants of negatives and positive indices.
(function() {
var array, spliced;
for (var i = 0; i < 7; i++) {
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(-100);
assertEquals([], array);
assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(-3);
assertEquals([1, 2, 3, 4], array);
assertEquals([5, 6, 7], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(4);
assertEquals([1, 2, 3, 4], array);
assertEquals([5, 6, 7], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(6);
assertEquals([1, 2, 3, 4, 5, 6], array);
assertEquals([7], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(7);
assertEquals([1, 2, 3, 4, 5, 6, 7], array);
assertEquals([], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(8);
assertEquals([1, 2, 3, 4, 5, 6, 7], array);
assertEquals([], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(100);
assertEquals([1, 2, 3, 4, 5, 6, 7], array);
assertEquals([], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(0, -100);
assertEquals([1, 2, 3, 4, 5, 6, 7], array);
assertEquals([], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(0, -3);
assertEquals([1, 2, 3, 4, 5, 6, 7], array);
assertEquals([], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(0, 4);
assertEquals([5, 6, 7], array);
assertEquals([1, 2, 3, 4], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(0, 6);
assertEquals([7], array);
assertEquals([1, 2, 3, 4, 5, 6], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(0, 7);
assertEquals([], array);
assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(0, 8);
assertEquals([], array);
assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
array = [1, 2, 3, 4, 5, 6, 7];
spliced = array.splice(0, 100);
assertEquals([], array);
assertEquals([1, 2, 3, 4, 5, 6, 7], spliced);
// Some exotic cases.
obj = { toString: function() { throw 'Exception'; } };
// Throwing an exception in conversion:
try {
[1, 2, 3].splice(obj, 3);
throw 'Should have thrown';
} catch (e) {
assertEquals('Exception', e);
}
try {
[1, 2, 3].splice(0, obj, 3);
throw 'Should have thrown';
} catch (e) {
assertEquals('Exception', e);
}
array = [1, 2, 3];
array.splice(0, 3, obj);
assertEquals(1, array.length);
// Custom conversion:
array = [1, 2, 3];
spliced = array.splice({valueOf: function() { return 1; }},
{toString: function() { return 2; }},
'one', 'two');
assertEquals([2, 3], spliced);
assertEquals([1, 'one', 'two'], array);
}
})();
// Nasty: modify the array in ToInteger.
(function() {
var array = [];
var spliced;
for (var i = 0; i < 13; i++) {
bad_start = { valueOf: function() { array.push(2*i); return -1; } };
bad_count = { valueOf: function() { array.push(2*i + 1); return 1; } };
spliced = array.splice(bad_start, bad_count);
// According to the spec (15.4.4.12), length is calculated before
// performing ToInteger on arguments. However, v8 ignores elements
// we add while converting, so we need corrective pushes.
array.push(2*i); array.push(2*i + 1);
if (i == 0) {
assertEquals([], spliced); // Length was 0, nothing to get.
assertEquals([0, 1], array);
} else {
// When we start splice, array is [0 .. 2*i - 1], so we get
// as a result [2*i], this element is removed from the array,
// but [2 * i, 2 * i + 1] are added.
assertEquals([2 * i - 1], spliced);
assertEquals(2 * i, array[i]);
assertEquals(2 * i + 1, array[i + 1]);
}
}
})();
// Now check the case with array of holes and some elements on prototype.
(function() {
var len = 9;
var at3 = "@3";
var at7 = "@7";
for (var i = 0; i < 7; i++) {
var array = new Array(len);
var array_proto = [];
array_proto[3] = at3;
array_proto[7] = at7;
array.__proto__ = array_proto;
var spliced = array.splice(2, 2, 'one', undefined, 'two');
// Second hole (at index 3) of array turns into
// value of Array.prototype[3] while copying.
assertEquals([, at3], spliced);
assertEquals([, , 'one', undefined, 'two', , , at7, at7, ,], array);
// ... but array[3] and array[7] is actually a hole:
assertTrue(delete array_proto[3]);
assertEquals(undefined, array[3]);
assertTrue(delete array_proto[7]);
assertEquals(undefined, array[7]);
// and now check hasOwnProperty
assertFalse(array.hasOwnProperty(0), "array.hasOwnProperty(0)");
assertFalse(array.hasOwnProperty(1), "array.hasOwnProperty(1)");
assertTrue(array.hasOwnProperty(2));
assertTrue(array.hasOwnProperty(3));
assertTrue(array.hasOwnProperty(4));
assertFalse(array.hasOwnProperty(5), "array.hasOwnProperty(5)");
assertFalse(array.hasOwnProperty(6), "array.hasOwnProperty(6)");
assertFalse(array.hasOwnProperty(7), "array.hasOwnProperty(7)");
assertTrue(array.hasOwnProperty(8));
assertFalse(array.hasOwnProperty(9), "array.hasOwnProperty(9)");
// and now check couple of indices above length.
assertFalse(array.hasOwnProperty(10), "array.hasOwnProperty(10)");
assertFalse(array.hasOwnProperty(15), "array.hasOwnProperty(15)");
assertFalse(array.hasOwnProperty(31), "array.hasOwnProperty(31)");
assertFalse(array.hasOwnProperty(63), "array.hasOwnProperty(63)");
assertFalse(array.hasOwnProperty(Math.pow(2, 32) - 2),
"array.hasOwnProperty(Math.pow(2, 32) - 2)");
}
})();
// Now check the case with array of holes and some elements on prototype.
(function() {
var len = 9;
var at3 = "@3";
var at7 = "@7";
for (var i = 0; i < 7; i++) {
var array = new Array(len);
Array.prototype[3] = at3;
Array.prototype[7] = at7;
var spliced = array.splice(2, 2, 'one', undefined, 'two');
// Second hole (at index 3) of array turns into
// value of Array.prototype[3] while copying.
assertEquals([, at3], spliced);
assertEquals([, , 'one', undefined, 'two', , , at7, at7, ,], array);
// ... but array[3] and array[7] is actually a hole:
assertTrue(delete Array.prototype[3]);
assertEquals(undefined, array[3]);
assertTrue(delete Array.prototype[7]);
assertEquals(undefined, array[7]);
// and now check hasOwnProperty
assertFalse(array.hasOwnProperty(0), "array.hasOwnProperty(0)");
assertFalse(array.hasOwnProperty(1), "array.hasOwnProperty(1)");
assertTrue(array.hasOwnProperty(2));
assertTrue(array.hasOwnProperty(3));
assertTrue(array.hasOwnProperty(4));
assertFalse(array.hasOwnProperty(5), "array.hasOwnProperty(5)");
assertFalse(array.hasOwnProperty(6), "array.hasOwnProperty(6)");
assertFalse(array.hasOwnProperty(7), "array.hasOwnProperty(7)");
assertTrue(array.hasOwnProperty(8));
assertFalse(array.hasOwnProperty(9), "array.hasOwnProperty(9)");
// and now check couple of indices above length.
assertFalse(array.hasOwnProperty(10), "array.hasOwnProperty(10)");
assertFalse(array.hasOwnProperty(15), "array.hasOwnProperty(15)");
assertFalse(array.hasOwnProperty(31), "array.hasOwnProperty(31)");
assertFalse(array.hasOwnProperty(63), "array.hasOwnProperty(63)");
assertFalse(array.hasOwnProperty(Math.pow(2, 32) - 2),
"array.hasOwnProperty(Math.pow(2, 32) - 2)");
}
})();
// Check the case of JS builtin .splice()
(function() {
for (var i = 0; i < 7; i++) {
var array = [1, 2, 3, 4];
Array.prototype[3] = 'foo'; // To force JS builtin.
var spliced = array.splice();
assertEquals([], spliced);
assertEquals([1, 2, 3, 4], array);
}
})();
// Check the behaviour when approaching maximal values for length.
(function() {
for (var i = 0; i < 7; i++) {
try {
new Array(Math.pow(2, 32) - 3).splice(-1, 0, 1, 2, 3, 4, 5);
throw 'Should have thrown RangeError';
} catch (e) {
assertTrue(e instanceof RangeError);
}
// Check smi boundary
var bigNum = (1 << 30) - 3;
var array = new Array(bigNum);
array.splice(-1, 0, 1, 2, 3, 4, 5, 6, 7);
assertEquals(bigNum + 7, array.length);
}
})();
(function() {
for (var i = 0; i < 7; i++) {
var a = [7, 8, 9];
a.splice(0, 0, 1, 2, 3, 4, 5, 6);
assertEquals([1, 2, 3, 4, 5, 6, 7, 8, 9], a);
assertFalse(a.hasOwnProperty(10), "a.hasOwnProperty(10)");
assertEquals(undefined, a[10]);
}
})();