fixup! Add tests for Array - calling super with a single argument

test/language/statements/class/subclass/builtin-objects/Array/contructor-calls-super-multiple-arguments.js

@@ -2,7 +2,8 @@
 // This code is governed by the BSD license found in the LICENSE file.
 /*---
 es6id: 22.1.1
-description: Subclass constructor calling super() creates an Exotic Array object
+description: >
+  Constructor calling super() with 2+ arguments creates an Array object
 info: >
   22.1.1 The Array Constructor
 

test/language/statements/class/subclass/builtin-objects/Array/contructor-calls-super-single-argument.js

@@ -0,0 +1,25 @@
+// Copyright (C) 2016 the V8 project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+/*---
+es6id: 22.1.1
+description: >
+  Constructor calling super() with a single argument creates an Array object
+info: >
+  22.1.1 The Array Constructor
+
+  The Array constructor is designed to be subclassable. It may be used as the
+  value of an extends clause of a class definition. Subclass constructors that
+  intend to inherit the exotic Array behaviour must include a super call to the
+  Array constructor to initialize subclass instances that are exotic Array
+  objects.
+---*/
+
+class Sub extends Array {
+  constructor(a) {
+    super(a);
+  }
+}
+
+var sub = new Sub(42);
+
+assert.sameValue(sub.length, 42);