Check enumerability of array indices correctly in propertyIsEnumerable.

test/mjsunit/regress/regress-1692.js

+// Copyright 2011 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.
+
+// Test that Object.prototype.propertyIsEnumerable handles array indices
+// correctly.
+
+var p = Object.create({}, {
+  a : { value : 42, enumerable : true },
+  b : { value : 42, enumerable : false },
+  1 : { value : 42, enumerable : true },
+  2 : { value : 42, enumerable : false },
+  f : { get: function(){}, enumerable: true },
+  g : { get: function(){}, enumerable: false },
+  11 : { get: function(){}, enumerable: true },
+  12 : { get: function(){}, enumerable: false }
+});
+var o = Object.create(p, {
+  c : { value : 42, enumerable : true },
+  d : { value : 42, enumerable : false },
+  3 : { value : 42, enumerable : true },
+  4 : { value : 42, enumerable : false },
+  h : { get: function(){}, enumerable: true },
+  k : { get: function(){}, enumerable: false },
+  13 : { get: function(){}, enumerable: true },
+  14 : { get: function(){}, enumerable: false }
+});
+
+// Inherited properties are ignored.
+assertFalse(o.propertyIsEnumerable("a"));
+assertFalse(o.propertyIsEnumerable("b"));
+assertFalse(o.propertyIsEnumerable("1"));
+assertFalse(o.propertyIsEnumerable("2"));
+
+// Own properties.
+assertTrue(o.propertyIsEnumerable("c"));
+assertFalse(o.propertyIsEnumerable("d"));
+assertTrue(o.propertyIsEnumerable("3"));
+assertFalse(o.propertyIsEnumerable("4"));
+
+// Inherited accessors.
+assertFalse(o.propertyIsEnumerable("f"));
+assertFalse(o.propertyIsEnumerable("g"));
+assertFalse(o.propertyIsEnumerable("11"));
+assertFalse(o.propertyIsEnumerable("12"));
+
+// Own accessors.
+assertTrue(o.propertyIsEnumerable("h"));
+assertFalse(o.propertyIsEnumerable("k"));
+assertTrue(o.propertyIsEnumerable("13"));
+assertFalse(o.propertyIsEnumerable("14"));
+
+// Nonexisting properties.
+assertFalse(o.propertyIsEnumerable("xxx"));
+assertFalse(o.propertyIsEnumerable("999"));
+
+// String object properties.
+var o = Object("string");
+// Non-string property on String object.
+o[10] = 42;
+assertTrue(o.propertyIsEnumerable(10));
+assertFalse(o.propertyIsEnumerable(0));
+
+// Fast elements.
+var o = [1,2,3,4,5];
+assertTrue(o.propertyIsEnumerable(3));

[arv (Not doing code reviews), 2011/10/03 16:40:30]

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