Implement Object.getOwnPropertyNames constructor property [ES5 section 15.2.3...

test/mjsunit/object-get-own-property-names.js

+// Copyright 2009 the V8 project authors. All rights reserved.
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+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Test ES5 section 15.2.3.4 Object.getOwnPropertyNames.
+
+// Check simple cases.
+var obj = { a: 1, b: 2};
+var propertyNames = Object.getOwnPropertyNames(obj);
+propertyNames.sort();
+assertEquals(2, propertyNames.length);
+assertEquals("a", propertyNames[0]);
+assertEquals("b", propertyNames[1]);
+
+var obj = { a: function(){}, b: function(){} };
+var propertyNames = Object.getOwnPropertyNames(obj);
+propertyNames.sort();
+assertEquals(2, propertyNames.length);
+assertEquals("a", propertyNames[0]);
+assertEquals("b", propertyNames[1]);
+
+// Check slow case
+var obj = { a: 1, b: 2, c: 3 };
+delete obj.b;
+var propertyNames = Object.getOwnPropertyNames(obj)
+propertyNames.sort();
+assertEquals(2, propertyNames.length);
+assertEquals("a", propertyNames[0]);
+assertEquals("c", propertyNames[1]);
+
+// Check that non-enumerable properties are being returned.
+var propertyNames = Object.getOwnPropertyNames([1, 2]);
+propertyNames.sort();
+assertEquals(3, propertyNames.length);
+assertEquals("0", propertyNames[0]);
+assertEquals("1", propertyNames[1]);
+assertEquals("length", propertyNames[2]);
+
+// Check that no proto properties are returned.
+var obj = { foo: "foo" };
+obj.__proto__ = { bar: "bar" };
+propertyNames = Object.getOwnPropertyNames(obj);
+propertyNames.sort();
+assertEquals(1, propertyNames.length);
+assertEquals("foo", propertyNames[0]);
+
+// Check that getter properties are returned.
+var obj = {};
+obj.__defineGetter__("getter", function() {});
+propertyNames = Object.getOwnPropertyNames(obj);
+propertyNames.sort();
+assertEquals(1, propertyNames.length);
+assertEquals("getter", propertyNames[0]);
+
+try {
+  Object.getOwnPropertyNames(4);
+  assertTrue(false);
+} catch (e) {
+  assertTrue(/on non-object/.test(e));
+}
+
+try {
+  Object.getOwnPropertyNames("foo");
+  assertTrue(false);
+} catch (e) {
+  assertTrue(/on non-object/.test(e));
+}
+
+try {
+  Object.getOwnPropertyNames(undefined);
+  assertTrue(false);
+} catch (e) {
+  assertTrue(/on non-object/.test(e));
+}
+
+try {
+  Object.getOwnPropertyNames(null);
+  assertTrue(false);
+} catch (e) {
+  assertTrue(/on non-object/.test(e));
+}