Migrate more tests from blink repository.

test/webkit/fast/js/read-modify-eval.js

+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  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.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
+
+description(
+'Tests whether eval() works inside statements that read and modify a value.'
+);
+
+function multTest()
+{
+    var x = 1;
+    x *= eval('2');
+    return x == 2;
+}
+
+function divTest()
+{
+    var x = 2;
+    x /= eval('2');
+    return x == 1;
+}
+
+function addTest()
+{
+    var x = 0;
+    x += eval('1');
+    return x == 1;
+}
+
+function subTest()
+{
+    var x = 0;
+    x -= eval('1');
+    return x == -1;
+}
+
+function lshiftTest()
+{
+    var x = 1;
+    x <<= eval('1');
+    return x == 2;
+}
+
+function rshiftTest()
+{
+    var x = 1;
+    x >>= eval('1');
+    return x == 0;
+}
+
+function urshiftTest()
+{
+    var x = 1;
+    x >>>= eval('1');
+    return x == 0;
+}
+
+function andTest()
+{
+    var x = 1;
+    x &= eval('1');
+    return x == 1;
+}
+
+function xorTest()
+{
+    var x = 0;
+    x ^= eval('1');
+    return x == 1;
+}
+
+function orTest()
+{
+    var x = 0;
+    x |= eval('1');
+    return x == 1;
+}
+
+function modTest()
+{
+    var x = 4;
+    x %= eval('3');
+    return x == 1;
+}
+
+function preIncTest()
+{
+    var x = { value: 0 };
+    ++eval('x').value;
+    return x.value == 1;
+}
+
+function preDecTest()
+{
+    var x = { value: 0 };
+    --eval('x').value;
+    return x.value == -1;
+}
+
+function postIncTest()
+{
+    var x = { value: 0 };
+    eval('x').value++;
+    return x.value == 1;
+}
+
+function postDecTest()
+{
+    var x = { value: 0 };
+    eval('x').value--;
+    return x.value == -1;
+}
+
+function primitiveThisTest()
+{
+    // Test that conversion of this is persistant over multiple calls to eval,
+    // even where 'this' is not directly used within the function.
+    eval('this.value = "Seekrit message";');
+    return eval('this.value') === "Seekrit message";
+}
+
+function strictThisTest()
+{
+    // In a strict mode function primitive this values are not converted, so
+    // the property access in the first eval is writing a value to a temporary
+    // object. This throws, per section 8.7.2.
+    "use strict";
+    eval('this.value = "Seekrit message";');
+    return eval('this.value') === undefined;
+}
+
+shouldBeTrue('multTest();');
+shouldBeTrue('divTest();');
+shouldBeTrue('addTest();');
+shouldBeTrue('subTest();');
+shouldBeTrue('lshiftTest();');
+shouldBeTrue('rshiftTest();');
+shouldBeTrue('urshiftTest();');
+shouldBeTrue('andTest();');
+shouldBeTrue('xorTest();');
+shouldBeTrue('orTest();');
+shouldBeTrue('modTest();');
+
+shouldBeTrue('preIncTest();');
+shouldBeTrue('preDecTest();');
+shouldBeTrue('postIncTest();');
+shouldBeTrue('postDecTest();');
+
+shouldBeTrue('primitiveThisTest.call(1);');
+shouldThrow('strictThisTest.call(1);');