[es6] Partially implement Reflect.ownKeys.

test/mjsunit/harmony/reflect-own-keys.js

-// Copyright 2009 the V8 project authors. All rights reserved.
+// Copyright 2015 the V8 project authors. All rights reserved.
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 // modification, are permitted provided that the following conditions are
 // met:
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 //       with the distribution.
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 //       contributors may be used to endorse or promote products derived
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 // 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 ES5 section 15.2.3.4 Object.getOwnPropertyNames.
+// This is adapted from mjsunit/object-get-own-property-names.js.
+
+// Flags: --harmony-reflect
+
 
 // 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 keys = Reflect.ownKeys(obj);
+keys.sort();
+assertEquals(2, keys.length);
+assertEquals("a", keys[0]);
+assertEquals("b", keys[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]);
+var keys = Reflect.ownKeys(obj);
+keys.sort();

[Camillo Bruni, 2015/11/05 08:29:35]

I don't like that we sort() here... doesn't the spec clearly specify "insertion
order"?
There seem to be other tests that will catch that tough :)

+assertEquals(2, keys.length);
+assertEquals("a", keys[0]);
+assertEquals("b", keys[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]);
+var keys = Reflect.ownKeys(obj)
+keys.sort();
+assertEquals(2, keys.length);
+assertEquals("a", keys[0]);
+assertEquals("c", keys[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("string", typeof propertyNames[0]);
-assertEquals("string", typeof propertyNames[1]);
-assertEquals("length", propertyNames[2]);
+var keys = Reflect.ownKeys([1, 2]);
+keys.sort();
+assertEquals(3, keys.length);
+assertEquals("0", keys[0]);
+assertEquals("1", keys[1]);
+assertEquals("string", typeof keys[0]);
+assertEquals("string", typeof keys[1]);
+assertEquals("length", keys[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]);
+keys = Reflect.ownKeys(obj);
+keys.sort();
+assertEquals(1, keys.length);
+assertEquals("foo", keys[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]);
+keys = Reflect.ownKeys(obj);
+keys.sort();
+assertEquals(1, keys.length);
+assertEquals("getter", keys[0]);
 
 // Check that implementation does not access Array.prototype.
 var savedConcat = Array.prototype.concat;
 Array.prototype.concat = function() { return []; }
-propertyNames = Object.getOwnPropertyNames({0: 'foo', bar: 'baz'});
-assertEquals(2, propertyNames.length);
-assertEquals('0', propertyNames[0]);
-assertEquals('bar', propertyNames[1]);
-assertSame(Array.prototype, propertyNames.__proto__);
+keys = Reflect.ownKeys({0: 'foo', bar: 'baz'});
+assertEquals(2, keys.length);
+assertEquals('0', keys[0]);
+assertEquals('bar', keys[1]);
+assertSame(Array.prototype, keys.__proto__);
 Array.prototype.concat = savedConcat;
 
-assertEquals(Object.getOwnPropertyNames(4), []);
-assertEquals(Object.getOwnPropertyNames("foo"), ["0", "1", "2", "length"]);
-assertEquals(Object.getOwnPropertyNames(true), []);
+assertThrows(function() { Reflect.ownKeys(4) }, TypeError);
+assertThrows(function() { Reflect.ownKeys("foo") }, TypeError);
+assertThrows(function() { Reflect.ownKeys(true) }, TypeError);
 
-try {
-  Object.getOwnPropertyNames(undefined);
-  assertTrue(false);
-} catch (e) {
-  assertTrue(/Cannot convert undefined or null to object/.test(e));
-}
-
-try {
-  Object.getOwnPropertyNames(null);
-  assertTrue(false);
-} catch (e) {
-  assertTrue(/Cannot convert undefined or null to object/.test(e));
-}
+assertEquals(Reflect.ownKeys(Object(4)), []);
+assertEquals(Reflect.ownKeys(Object("foo")), ["0", "1", "2", "length"]);
+assertEquals(Reflect.ownKeys(Object(true)), []);