v8/test/mjsunit/string-charcodeat.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 Check all sorts of borderline cases for charCodeAt.
*/
function Cons() {
return "Te" + "st";
}
function Deep() {
var a = "T";
a += "e";
a += "s";
a += "t";
return a;
}
function Slice() {
return "testing Testing".substring(8, 12);
}
function Flat() {
return "Test";
}
function Cons16() {
return "Te" + "\u1234t";
}
function Deep16() {
var a = "T";
a += "e";
a += "\u1234";
a += "t";
return a;
}
function Slice16Beginning() {
return "Te\u1234t test".substring(0, 4);
}
function Slice16Middle() {
return "test Te\u1234t test".substring(5, 9);
}
function Slice16End() {
return "test Te\u1234t".substring(5, 9);
}
function Flat16() {
return "Te\u1234t";
}
function Thing() {
}
function NotAString() {
var n = new Thing();
n.toString = function() { return "Test"; };
n.charCodeAt = String.prototype.charCodeAt;
return n;
}
function NotAString16() {
var n = new Thing();
n.toString = function() { return "Te\u1234t"; };
n.charCodeAt = String.prototype.charCodeAt;
return n;
}
function TestStringType(generator, sixteen) {
var g = generator;
assertTrue(isNaN(g().charCodeAt(-1e19)));
assertTrue(isNaN(g().charCodeAt(-0x80000001)));
assertTrue(isNaN(g().charCodeAt(-0x80000000)));
assertTrue(isNaN(g().charCodeAt(-0x40000000)));
assertTrue(isNaN(g().charCodeAt(-1)));
assertTrue(isNaN(g().charCodeAt(4)));
assertTrue(isNaN(g().charCodeAt(5)));
assertTrue(isNaN(g().charCodeAt(0x3fffffff)));
assertTrue(isNaN(g().charCodeAt(0x7fffffff)));
assertTrue(isNaN(g().charCodeAt(0x80000000)));
assertTrue(isNaN(g().charCodeAt(1e9)));
assertEquals(84, g().charCodeAt(0));
assertEquals(84, g().charCodeAt("test"));
assertEquals(84, g().charCodeAt(""));
assertEquals(84, g().charCodeAt(null));
assertEquals(84, g().charCodeAt(undefined));
assertEquals(84, g().charCodeAt());
assertEquals(84, g().charCodeAt(void 0));
assertEquals(84, g().charCodeAt(false));
assertEquals(101, g().charCodeAt(true));
assertEquals(101, g().charCodeAt(1));
assertEquals(sixteen ? 0x1234 : 115, g().charCodeAt(2));
assertEquals(116, g().charCodeAt(3));
assertEquals(101, g().charCodeAt(1.1));
assertEquals(sixteen ? 0x1234 : 115, g().charCodeAt(2.1718));
assertEquals(116, g().charCodeAt(3.14159));
}
TestStringType(Cons, false);
TestStringType(Deep, false);
TestStringType(Slice, false);
TestStringType(Flat, false);
TestStringType(NotAString, false);
TestStringType(Cons16, true);
TestStringType(Deep16, true);
TestStringType(Slice16Beginning, true);
TestStringType(Slice16Middle, true);
TestStringType(Slice16End, true);
TestStringType(Flat16, true);
TestStringType(NotAString16, true);
function StupidThing() {
// Doesn't return a string from toString!
this.toString = function() { return 42; }
this.charCodeAt = String.prototype.charCodeAt;
}
assertEquals(52, new StupidThing().charCodeAt(0));
assertEquals(50, new StupidThing().charCodeAt(1));
assertTrue(isNaN(new StupidThing().charCodeAt(2)));
assertTrue(isNaN(new StupidThing().charCodeAt(-1)));
// Medium (>255) and long (>65535) strings.
var medium = "12345678";
medium += medium; // 16.
medium += medium; // 32.
medium += medium; // 64.
medium += medium; // 128.
medium += medium; // 256.
var long = medium;
long += long + long + long; // 1024.
long += long + long + long; // 4096.
long += long + long + long; // 16384.
long += long + long + long; // 65536.
assertTrue(isNaN(medium.charCodeAt(-1)));
assertEquals(49, medium.charCodeAt(0));
assertEquals(56, medium.charCodeAt(255));
assertTrue(isNaN(medium.charCodeAt(256)));
assertTrue(isNaN(long.charCodeAt(-1)));
assertEquals(49, long.charCodeAt(0));
assertEquals(56, long.charCodeAt(65535));
assertTrue(isNaN(long.charCodeAt(65536)));