Testcase for Reflect.ownKeys() order

Doesn't implement Symbol order now.

tests/ecmascript/test-bi-reflect-ownkeys-symbol-order-2.js

@@ -0,0 +1,37 @@
+/*===
+0
+1
+2
+3
+7
+foo
+bar
+quux
+S2
+S3
+S1
+===*/
+
+var S1 = Symbol('s1');
+var S2 = Symbol('s2');
+var S3 = Symbol('s3');
+
+var obj = {};
+obj[1] = 'one';
+obj['foo'] = 'foo';
+obj[0] = 'zero';
+obj[3] = 'three';
+obj[S2] = 's2';
+obj[2] = 'two';
+obj[S3] = 's3';
+obj['bar'] = 'bar';
+obj[S1] = 's1';
+obj['quux'] = 'quux';
+obj[7] = 'seven';
+
+Reflect.ownKeys(obj).forEach(function (v) {
+    if (v === S1) { print('S1'); }
+    else if (v === S2) { print('S2'); }
+    else if (v === S3) { print('S3'); }
+    else { print(v); }
+});

tests/ecmascript/test-bi-reflect-ownkeys-symbol-order-3.js

@@ -0,0 +1,27 @@
+/*===
+foo
+bar
+quux
+S2
+S3
+S1
+===*/
+
+var S1 = Symbol('s1');
+var S2 = Symbol('s2');
+var S3 = Symbol('s3');
+
+var obj = {};
+obj['foo'] = 'foo';
+obj[S2] = 's2';
+obj[S3] = 's3';
+obj['bar'] = 'bar';
+obj[S1] = 's1';
+obj['quux'] = 'quux';
+
+Reflect.ownKeys(obj).forEach(function (v) {
+    if (v === S1) { print('S1'); }
+    else if (v === S2) { print('S2'); }
+    else if (v === S3) { print('S3'); }
+    else { print(v); }
+});

tests/ecmascript/test-bi-reflect-ownkeys-symbol-order.js

@@ -0,0 +1,28 @@
+/*===
+7
+300
+100
+500
+700
+200
+400
+600
+===*/
+
+var sym1 = Symbol();
+var sym2 = Symbol();
+var sym3 = Symbol();
+var obj = {};
+obj.foo = 100;
+obj[sym1] = 200;
+obj[3] = 300;
+obj[sym2] = 400;
+obj.quux = 500;
+obj[sym3] = 600;
+obj.baz = 700;
+
+var keys = Reflect.ownKeys(obj);
+print(keys.length);
+keys.forEach(function (v) {
+    print(obj[v]);
+});