Add test for the Math object

test/built-ins/Math/prop-desc.js

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+// Copyright (C) 2016 The V8 Project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es6id: 20.2
+esid: sec-math-object
+description: >
+  Property descriptor of Math
+info: |
+  The Math Object
+
+  [...]
+  The Math object is not a function object. It does not have a [[Construct]]
+  internal method; it is not possible to use the Math object as a constructor
+  with the new operator. The Math object also does not have a [[Call]] internal
+  method; it is not possible to invoke the Math object as a function.
+
+  17 ECMAScript Standard Built-in Objects:
+
+  Every other data property described in clauses 18 through 26 and in Annex B.2
+  has the attributes { [[Writable]]: true, [[Enumerable]]: false,
+  [[Configurable]]: true } unless otherwise specified.
+includes: [propertyHelper.js]
+---*/
+
+assert.sameValue(typeof Math, "object", "no [[Call]]");
+assert.throws(TypeError, function() {
+  new Math();
+}, "no [[Construct]]");
+
+verifyNotEnumerable(this, "Math");
+verifyWritable(this, "Math");
+verifyConfigurable(this, "Math");

test/built-ins/Math/proto.js

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+// Copyright (C) 2016 The V8 Project authors. All rights reserved.
+// This code is governed by the BSD license found in the LICENSE file.
+
+/*---
+es6id: 20.2
+esid: sec-math-object
+description: >
+  The prototype of Math is Object.prototype
+info: |
+  The Math Object
+
+  The value of the [[Prototype]] internal slot of the Math object is the
+  intrinsic object %ObjectPrototype%.
+---*/
+
+var proto = Object.getPrototypeOf(Math);
+
+assert.sameValue(proto, Object.prototype);