457c02573c
As required by the spec. BUG=v8:5113 Review-Url: https://codereview.chromium.org/2141603002 Cr-Commit-Position: refs/heads/master@{#37689}
182 lines
6.5 KiB
JavaScript
182 lines
6.5 KiB
JavaScript
// Copyright 2011 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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// Array's toString should call the object's own join method, if one exists and
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// is callable. Otherwise, just use the original Object.toString function.
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var success = "[test success]";
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var expectedThis;
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function testJoin() {
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assertEquals(0, arguments.length);
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assertSame(expectedThis, this);
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return success;
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}
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// On an Array object.
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// Default case.
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var a1 = [1, 2, 3];
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assertEquals(a1.join(), a1.toString());
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// Non-standard "join" function is called correctly.
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var a2 = [1, 2, 3];
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a2.join = testJoin;
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expectedThis = a2;
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assertEquals(success, a2.toString());
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// Non-callable join function is ignored and Object.prototype.toString is
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// used instead.
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var a3 = [1, 2, 3];
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a3.join = "not callable";
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assertEquals("[object Array]", a3.toString());
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// Non-existing join function is treated same as non-callable.
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var a4 = [1, 2, 3];
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a4.__proto__ = { toString: Array.prototype.toString };
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// No join on Array.
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assertEquals("[object Array]", a4.toString());
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// On a non-Array object.
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// Default looks-like-an-array case.
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var o1 = {length: 3, 0: 1, 1: 2, 2: 3,
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toString: Array.prototype.toString,
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join: Array.prototype.join};
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assertEquals(o1.join(), o1.toString());
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// Non-standard join is called correctly.
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// Check that we don't read, e.g., length before calling join.
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var o2 = {toString : Array.prototype.toString,
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join: testJoin,
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get length() { assertUnreachable(); },
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get 0() { assertUnreachable(); }};
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expectedThis = o2;
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assertEquals(success, o2.toString());
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// Non-standard join is called even if it looks like an array.
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var o3 = {length: 3, 0: 1, 1: 2, 2: 3,
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toString: Array.prototype.toString,
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join: testJoin};
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expectedThis = o3;
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assertEquals(success, o3.toString());
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// Non-callable join works same as for Array.
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var o4 = {length: 3, 0: 1, 1: 2, 2: 3,
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toString: Array.prototype.toString,
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join: "not callable"};
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assertEquals("[object Object]", o4.toString());
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// Non-existing join works same as for Array.
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var o5 = {length: 3, 0: 1, 1: 2, 2: 3,
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toString: Array.prototype.toString
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/* no join */};
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assertEquals("[object Object]", o5.toString());
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// Test that ToObject is called before getting "join", so the instance
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// that "join" is read from is the same one passed as receiver later.
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var called_before = false;
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expectedThis = null;
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Object.defineProperty(Number.prototype, "join", {get: function() {
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assertFalse(called_before);
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called_before = true;
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expectedThis = this;
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return testJoin;
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}});
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Number.prototype.arrayToString = Array.prototype.toString;
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assertEquals(success, (42).arrayToString());
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// ----------------------------------------------------------
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// Testing Array.prototype.toLocaleString
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// Ensure that it never uses Array.prototype.toString for anything.
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Array.prototype.toString = function() { assertUnreachable(); };
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// Default case.
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var la1 = [1, [2, 3], 4];
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assertEquals("1,2,3,4", la1.toLocaleString());
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// Used on a string (which looks like an array of characters).
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String.prototype.toLocaleString = function() {
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return (this.length == 1) ? this : Array.prototype.toLocaleString.call(this);
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}
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assertEquals("1,2,3,4", "1234".toLocaleString());
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// If toLocaleString of element is not callable, throw a TypeError.
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var la2 = [1, {toLocaleString: "not callable"}, 3];
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assertThrows(function() { la2.toLocaleString(); }, TypeError);
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// If toLocaleString of element is callable, call it.
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var la3 = [1, {toLocaleString: function() { return "XX";}}, 3];
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assertEquals("1,XX,3", la3.toLocaleString());
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// Omitted elements, as well as undefined and null, become empty string.
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var la4 = [1, null, 3, undefined, 5,, 7];
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assertEquals("1,,3,,5,,7", la4.toLocaleString());
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// ToObject is called first and the same object is being used for the
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// rest of the operations.
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Object.defineProperty(Number.prototype, "length", {
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get: function() {
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exptectedThis = this;
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return 3;
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}});
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for (var i = 0; i < 3; i++) {
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Object.defineProperty(Number.prototype, i, {
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get: function() {
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assertEquals(expectedThis, this);
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return +this;
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}});
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}
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Number.prototype.arrayToLocaleString = Array.prototype.toLocaleString;
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assertEquals("42,42,42", (42).arrayToLocaleString());
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(function TestToLocaleStringCalls() {
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let log = [];
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let pushArgs = (label) => (...args) => log.push(label, args);
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let NumberToLocaleString = Number.prototype.toLocaleString;
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let StringToLocaleString = String.prototype.toLocaleString;
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let ObjectToLocaleString = Object.prototype.toLocaleString;
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Number.prototype.toLocaleString = pushArgs("Number");
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String.prototype.toLocaleString = pushArgs("String");
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Object.prototype.toLocaleString = pushArgs("Object");
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[42, "foo", {}].toLocaleString();
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assertEquals(["Number", [], "String", [], "Object", []], log);
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Number.prototype.toLocaleString = NumberToLocaleString;
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String.prototype.toLocaleString = StringToLocaleString;
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Object.prototype.toLocaleString = ObjectToLocaleString;
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})();
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