[es6] Partially implement Reflect.getOwnPropertyDescriptor.

test/mjsunit/harmony/reflect.js

Index: test/mjsunit/harmony/reflect.js
diff --git a/test/mjsunit/harmony/reflect.js b/test/mjsunit/harmony/reflect.js
index c410cf903258cec7b8fd529f3cdf46b6fb7e790a..a2b56e5a10b8a14ad16c95ff7b36a941c60218c6 100644
--- a/test/mjsunit/harmony/reflect.js
+++ b/test/mjsunit/harmony/reflect.js
@@ -361,6 +361,38 @@ function prepare(tgt) {
 
 
 ////////////////////////////////////////////////////////////////////////////////
+// Reflect.getOwnPropertyDescriptor
+
+
+(function testReflectGetOwnPropertyDescriptorArity() {
+  assertEquals(2, Reflect.getOwnPropertyDescriptor.length);
+})();
+
+
+(function testReflectGetOwnPropertyDescriptorOnNonObject() {
+  assertThrows(function() { Reflect.getOwnPropertyDescriptor(); }, TypeError);
+  assertThrows(function() { Reflect.getOwnPropertyDescriptor(42); },
+    TypeError);
+  assertThrows(function() { Reflect.getOwnPropertyDescriptor(null); },
+    TypeError);
+})();
+
+
+(function testReflectGetOwnPropertyDescriptorKeyConversion() {
+  var tgt = {bla: 42};
+  var a = { [Symbol.toPrimitive]: function() { return "bla" } };
+  var b = { [Symbol.toPrimitive]: function() { throw "gaga" } };
+  assertEquals(42, Reflect.getOwnPropertyDescriptor(tgt, a).value);
+  assertThrows(function() { Reflect.getOwnPropertyDescriptor(tgt, b); },
+    "gaga");
+})();
+
+
+// See reflect-get-own-property-descriptor.js for further tests.
+
+
+
+////////////////////////////////////////////////////////////////////////////////
 // Reflect.preventExtensions