test/mjsunit/string-index.js - platform/external/v8 - Git at Google

 // 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 indexing on strings with [].
  */

 var foo = "Foo";
 assertEquals("Foo", foo);
 assertEquals("F", foo[0]);
 assertEquals("o", foo[1]);
 assertEquals("o", foo[2]);

 // Test string keyed load IC.
 for (var i = 0; i < 10; i++) {
   assertEquals("F", foo[0]);
   assertEquals("o", foo[1]);
   assertEquals("o", foo[2]);
   assertEquals("F", (foo[0] + "BarBazQuuxFooBarQuux")[0]);
 }

 assertEquals("F", foo["0" + ""], "string index");
 assertEquals("o", foo["1"], "string index");
 assertEquals("o", foo["2"], "string index");

 assertEquals("undefined", typeof(foo[3]), "out of range");
 // SpiderMonkey 1.5 fails this next one.  So does FF 2.0.6.
 assertEquals("undefined", typeof(foo[-1]), "known failure in SpiderMonkey 1.5");
 assertEquals("undefined", typeof(foo[-2]), "negative index");

 foo[0] = "f";
 assertEquals("Foo", foo);

 foo[3] = "t";
 assertEquals("Foo", foo);
 assertEquals("undefined", typeof(foo[3]), "out of range");
 assertEquals("undefined", typeof(foo[-2]), "negative index");

 var S = new String("foo");
 assertEquals(Object("foo"), S);
 assertEquals("f", S[0], "string object");
 assertEquals("f", S["0"], "string object");
 S[0] = 'bente';
 assertEquals("f", S[0], "string object");
 assertEquals("f", S["0"], "string object");
 S[-2] = 'spider';
 assertEquals('spider', S[-2]);
 S[3] = 'monkey';
 assertEquals('monkey', S[3]);
 S['foo'] = 'Fu';
 assertEquals("Fu", S.foo);

 // In FF this is ignored I think.  In V8 it puts a property on the String object
 // but you won't ever see it because it is hidden by the 0th character in the
 // string.  The net effect is pretty much the same.
 S["0"] = 'bente';
 assertEquals("f", S[0], "string object");
 assertEquals("f", S["0"], "string object");

 assertEquals(true, 0 in S, "0 in");
 assertEquals(false, -1 in S, "-1 in");
 assertEquals(true, 2 in S, "2 in");
 assertEquals(true, 3 in S, "3 in");
 assertEquals(false, 4 in S, "3 in");

 assertEquals(true, "0" in S, '"0" in');
 assertEquals(false, "-1" in S, '"-1" in');
 assertEquals(true, "2" in S, '"2" in');
 assertEquals(true, "3" in S, '"3" in');
 assertEquals(false, "4" in S, '"3" in');

 assertEquals(true, S.hasOwnProperty(0), "0 hasOwnProperty");
 assertEquals(false, S.hasOwnProperty(-1), "-1 hasOwnProperty");
 assertEquals(true, S.hasOwnProperty(2), "2 hasOwnProperty");
 assertEquals(true, S.hasOwnProperty(3), "3 hasOwnProperty");
 assertEquals(false, S.hasOwnProperty(4), "3 hasOwnProperty");

 assertEquals(true, S.hasOwnProperty("0"), '"0" hasOwnProperty');
 assertEquals(false, S.hasOwnProperty("-1"), '"-1" hasOwnProperty');
 assertEquals(true, S.hasOwnProperty("2"), '"2" hasOwnProperty');
 assertEquals(true, S.hasOwnProperty("3"), '"3" hasOwnProperty');
 assertEquals(false, S.hasOwnProperty("4"), '"3" hasOwnProperty');

 assertEquals(true, "foo".hasOwnProperty(0), "foo 0 hasOwnProperty");
 assertEquals(false, "foo".hasOwnProperty(-1), "foo -1 hasOwnProperty");
 assertEquals(true, "foo".hasOwnProperty(2), "foo 2 hasOwnProperty");
 assertEquals(false, "foo".hasOwnProperty(4), "foo 3 hasOwnProperty");

 assertEquals(true, "foo".hasOwnProperty("0"), 'foo "0" hasOwnProperty');
 assertEquals(false, "foo".hasOwnProperty("-1"), 'foo "-1" hasOwnProperty');
 assertEquals(true, "foo".hasOwnProperty("2"), 'foo "2" hasOwnProperty');
 assertEquals(false, "foo".hasOwnProperty("4"), 'foo "3" hasOwnProperty');

 //assertEquals(true, 0 in "foo", "0 in");
 //assertEquals(false, -1 in "foo", "-1 in");
 //assertEquals(true, 2 in "foo", "2 in");
 //assertEquals(false, 3 in "foo", "3 in");
 //
 //assertEquals(true, "0" in "foo", '"0" in');
 //assertEquals(false, "-1" in "foo", '"-1" in');
 //assertEquals(true, "2" in "foo", '"2" in');
 //assertEquals(false, "3" in "foo", '"3" in');

 delete S[3];
 assertEquals("undefined", typeof(S[3]));
 assertEquals(false, 3 in S);
 assertEquals(false, "3" in S);

 var N = new Number(43);
 assertEquals(Object(43), N);
 N[-2] = "Alpha";
 assertEquals("Alpha", N[-2]);
 N[0] = "Zappa";
 assertEquals("Zappa", N[0]);
 assertEquals("Zappa", N["0"]);

 var A = ["V", "e", "t", "t", "e", "r"];
 var A2 = (A[0] = "v");
 assertEquals('v', A[0]);
 assertEquals('v', A2);

 var S = new String("Onkel");
 var S2 = (S[0] = 'o');
 assertEquals('O', S[0]);
 assertEquals('o', S2);

 var s = "Tante";
 var s2 = (s[0] = 't');
 assertEquals('T', s[0]);
 assertEquals('t', s2);

 var S2 = (S[-2] = 'o');
 assertEquals('o', S[-2]);
 assertEquals('o', S2);

 var s2 = (s[-2] = 't');
 assertEquals('undefined', typeof(s[-2]));
 assertEquals('t', s2);

 // Make sure enough of the one-char string cache is filled.
 var alpha = ['@'];
 for (var i = 1; i < 128; i++) {
   var c = String.fromCharCode(i);
   alpha[i] = c[0];
 }
 var alphaStr = alpha.join("");

 // Now test chars.
 for (var i = 1; i < 128; i++) {
   assertEquals(alpha[i], alphaStr[i]);
   assertEquals(String.fromCharCode(i), alphaStr[i]);
 }

 // Test for keyed ic.
 var foo = ['a12', ['a', 2, 'c'], 'a31', 42];
 var results = [1, 2, 3, NaN];
 for (var i = 0; i < 200; ++i) {
   var index = Math.floor(i / 50);
   var receiver = foo[index];
   var expected = results[index];
   var actual = +(receiver[1]);
   assertEquals(expected, actual);
 }

 var keys = [0, '1', 2, 3.0, -1, 10];
 var str = 'abcd', arr = ['a', 'b', 'c', 'd', undefined, undefined];
 for (var i = 0; i < 300; ++i) {
   var index = Math.floor(i / 50);
   var key = keys[index];
   var expected = arr[index];
   var actual = str[key];
   assertEquals(expected, actual);
 }

 // Test heap number case.
 var keys = [0, Math.floor(2) * 0.5];
 var str = 'ab', arr = ['a', 'b'];
 for (var i = 0; i < 100; ++i) {
   var index = Math.floor(i / 50);
   var key = keys[index];
   var expected = arr[index];
   var actual = str[key];
   assertEquals(expected, actual);
 }

 // Test negative zero case.
 var keys = [0, -0.0];
 var str = 'ab', arr = ['a', 'a'];
 for (var i = 0; i < 100; ++i) {
   var index = Math.floor(i / 50);
   var key = keys[index];
   var expected = arr[index];
   var actual = str[key];
   assertEquals(expected, actual);
 }

 // Test "not-an-array-index" case.
 var keys = [0, 0.5];
 var str = 'ab', arr = ['a', undefined];
 for (var i = 0; i < 100; ++i) {
   var index = Math.floor(i / 50);
   var key = keys[index];
   var expected = arr[index];
   var actual = str[key];
   assertEquals(expected, actual);
 }

 // Test out of range case.
 var keys = [0, -1];
 var str = 'ab', arr = ['a', undefined];
 for (var i = 0; i < 100; ++i) {
   var index = Math.floor(i / 50);
   var key = keys[index];
   var expected = arr[index];
   var actual = str[key];
   assertEquals(expected, actual);
 }

 var keys = [0, 10];
 var str = 'ab', arr = ['a', undefined];
 for (var i = 0; i < 100; ++i) {
   var index = Math.floor(i / 50);
   var key = keys[index];
   var expected = arr[index];
   var actual = str[key];
   assertEquals(expected, actual);
 }

 // Test two byte string.
 var str = '\u0427', arr = ['\u0427'];
 for (var i = 0; i < 50; ++i) {
   var expected = arr[0];
   var actual = str[0];
   assertEquals(expected, actual);
 }
	// 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 indexing on strings with [].
	*/

	var foo = "Foo";
	assertEquals("Foo", foo);
	assertEquals("F", foo[0]);
	assertEquals("o", foo[1]);
	assertEquals("o", foo[2]);

	// Test string keyed load IC.
	for (var i = 0; i < 10; i++) {
	assertEquals("F", foo[0]);
	assertEquals("o", foo[1]);
	assertEquals("o", foo[2]);
	assertEquals("F", (foo[0] + "BarBazQuuxFooBarQuux")[0]);
	}

	assertEquals("F", foo["0" + ""], "string index");
	assertEquals("o", foo["1"], "string index");
	assertEquals("o", foo["2"], "string index");

	assertEquals("undefined", typeof(foo[3]), "out of range");
	// SpiderMonkey 1.5 fails this next one. So does FF 2.0.6.
	assertEquals("undefined", typeof(foo[-1]), "known failure in SpiderMonkey 1.5");
	assertEquals("undefined", typeof(foo[-2]), "negative index");

	foo[0] = "f";
	assertEquals("Foo", foo);

	foo[3] = "t";
	assertEquals("Foo", foo);
	assertEquals("undefined", typeof(foo[3]), "out of range");
	assertEquals("undefined", typeof(foo[-2]), "negative index");

	var S = new String("foo");
	assertEquals(Object("foo"), S);
	assertEquals("f", S[0], "string object");
	assertEquals("f", S["0"], "string object");
	S[0] = 'bente';
	assertEquals("f", S[0], "string object");
	assertEquals("f", S["0"], "string object");
	S[-2] = 'spider';
	assertEquals('spider', S[-2]);
	S[3] = 'monkey';
	assertEquals('monkey', S[3]);
	S['foo'] = 'Fu';
	assertEquals("Fu", S.foo);

	// In FF this is ignored I think. In V8 it puts a property on the String object
	// but you won't ever see it because it is hidden by the 0th character in the
	// string. The net effect is pretty much the same.
	S["0"] = 'bente';
	assertEquals("f", S[0], "string object");
	assertEquals("f", S["0"], "string object");

	assertEquals(true, 0 in S, "0 in");
	assertEquals(false, -1 in S, "-1 in");
	assertEquals(true, 2 in S, "2 in");
	assertEquals(true, 3 in S, "3 in");
	assertEquals(false, 4 in S, "3 in");

	assertEquals(true, "0" in S, '"0" in');
	assertEquals(false, "-1" in S, '"-1" in');
	assertEquals(true, "2" in S, '"2" in');
	assertEquals(true, "3" in S, '"3" in');
	assertEquals(false, "4" in S, '"3" in');

	assertEquals(true, S.hasOwnProperty(0), "0 hasOwnProperty");
	assertEquals(false, S.hasOwnProperty(-1), "-1 hasOwnProperty");
	assertEquals(true, S.hasOwnProperty(2), "2 hasOwnProperty");
	assertEquals(true, S.hasOwnProperty(3), "3 hasOwnProperty");
	assertEquals(false, S.hasOwnProperty(4), "3 hasOwnProperty");

	assertEquals(true, S.hasOwnProperty("0"), '"0" hasOwnProperty');
	assertEquals(false, S.hasOwnProperty("-1"), '"-1" hasOwnProperty');
	assertEquals(true, S.hasOwnProperty("2"), '"2" hasOwnProperty');
	assertEquals(true, S.hasOwnProperty("3"), '"3" hasOwnProperty');
	assertEquals(false, S.hasOwnProperty("4"), '"3" hasOwnProperty');

	assertEquals(true, "foo".hasOwnProperty(0), "foo 0 hasOwnProperty");
	assertEquals(false, "foo".hasOwnProperty(-1), "foo -1 hasOwnProperty");
	assertEquals(true, "foo".hasOwnProperty(2), "foo 2 hasOwnProperty");
	assertEquals(false, "foo".hasOwnProperty(4), "foo 3 hasOwnProperty");

	assertEquals(true, "foo".hasOwnProperty("0"), 'foo "0" hasOwnProperty');
	assertEquals(false, "foo".hasOwnProperty("-1"), 'foo "-1" hasOwnProperty');
	assertEquals(true, "foo".hasOwnProperty("2"), 'foo "2" hasOwnProperty');
	assertEquals(false, "foo".hasOwnProperty("4"), 'foo "3" hasOwnProperty');

	//assertEquals(true, 0 in "foo", "0 in");
	//assertEquals(false, -1 in "foo", "-1 in");
	//assertEquals(true, 2 in "foo", "2 in");
	//assertEquals(false, 3 in "foo", "3 in");
	//
	//assertEquals(true, "0" in "foo", '"0" in');
	//assertEquals(false, "-1" in "foo", '"-1" in');
	//assertEquals(true, "2" in "foo", '"2" in');
	//assertEquals(false, "3" in "foo", '"3" in');

	delete S[3];
	assertEquals("undefined", typeof(S[3]));
	assertEquals(false, 3 in S);
	assertEquals(false, "3" in S);

	var N = new Number(43);
	assertEquals(Object(43), N);
	N[-2] = "Alpha";
	assertEquals("Alpha", N[-2]);
	N[0] = "Zappa";
	assertEquals("Zappa", N[0]);
	assertEquals("Zappa", N["0"]);

	var A = ["V", "e", "t", "t", "e", "r"];
	var A2 = (A[0] = "v");
	assertEquals('v', A[0]);
	assertEquals('v', A2);

	var S = new String("Onkel");
	var S2 = (S[0] = 'o');
	assertEquals('O', S[0]);
	assertEquals('o', S2);

	var s = "Tante";
	var s2 = (s[0] = 't');
	assertEquals('T', s[0]);
	assertEquals('t', s2);

	var S2 = (S[-2] = 'o');
	assertEquals('o', S[-2]);
	assertEquals('o', S2);

	var s2 = (s[-2] = 't');
	assertEquals('undefined', typeof(s[-2]));
	assertEquals('t', s2);

	// Make sure enough of the one-char string cache is filled.
	var alpha = ['@'];
	for (var i = 1; i < 128; i++) {
	var c = String.fromCharCode(i);
	alpha[i] = c[0];
	}
	var alphaStr = alpha.join("");

	// Now test chars.
	for (var i = 1; i < 128; i++) {
	assertEquals(alpha[i], alphaStr[i]);
	assertEquals(String.fromCharCode(i), alphaStr[i]);
	}

	// Test for keyed ic.
	var foo = ['a12', ['a', 2, 'c'], 'a31', 42];
	var results = [1, 2, 3, NaN];
	for (var i = 0; i < 200; ++i) {
	var index = Math.floor(i / 50);
	var receiver = foo[index];
	var expected = results[index];
	var actual = +(receiver[1]);
	assertEquals(expected, actual);
	}

	var keys = [0, '1', 2, 3.0, -1, 10];
	var str = 'abcd', arr = ['a', 'b', 'c', 'd', undefined, undefined];
	for (var i = 0; i < 300; ++i) {
	var index = Math.floor(i / 50);
	var key = keys[index];
	var expected = arr[index];
	var actual = str[key];
	assertEquals(expected, actual);
	}

	// Test heap number case.
	var keys = [0, Math.floor(2) * 0.5];
	var str = 'ab', arr = ['a', 'b'];
	for (var i = 0; i < 100; ++i) {
	var index = Math.floor(i / 50);
	var key = keys[index];
	var expected = arr[index];
	var actual = str[key];
	assertEquals(expected, actual);
	}

	// Test negative zero case.
	var keys = [0, -0.0];
	var str = 'ab', arr = ['a', 'a'];
	for (var i = 0; i < 100; ++i) {
	var index = Math.floor(i / 50);
	var key = keys[index];
	var expected = arr[index];
	var actual = str[key];
	assertEquals(expected, actual);
	}

	// Test "not-an-array-index" case.
	var keys = [0, 0.5];
	var str = 'ab', arr = ['a', undefined];
	for (var i = 0; i < 100; ++i) {
	var index = Math.floor(i / 50);
	var key = keys[index];
	var expected = arr[index];
	var actual = str[key];
	assertEquals(expected, actual);
	}

	// Test out of range case.
	var keys = [0, -1];
	var str = 'ab', arr = ['a', undefined];
	for (var i = 0; i < 100; ++i) {
	var index = Math.floor(i / 50);
	var key = keys[index];
	var expected = arr[index];
	var actual = str[key];
	assertEquals(expected, actual);
	}

	var keys = [0, 10];
	var str = 'ab', arr = ['a', undefined];
	for (var i = 0; i < 100; ++i) {
	var index = Math.floor(i / 50);
	var key = keys[index];
	var expected = arr[index];
	var actual = str[key];
	assertEquals(expected, actual);
	}

	// Test two byte string.
	var str = '\u0427', arr = ['\u0427'];
	for (var i = 0; i < 50; ++i) {
	var expected = arr[0];
	var actual = str[0];
	assertEquals(expected, actual);
	}