// Copyright (c) 2012 Ecma International.  All rights reserved.
// This code is governed by the BSD license found in the LICENSE file.

/*---
info: >
    This test is actually testing the [[Delete]] internal method (8.12.8). Since the
    language provides no way to directly exercise [[Delete]], the tests are placed here.
es5id: 11.4.1-4.a-9-s
description: >
    delete operator throws TypeError when deleting a non-configurable
    data property (Math.LN2) in strict mode
flags: [onlyStrict]
includes: [runTestCase.js]
---*/

function testcase() {
  try {
    delete Math.LN2;
    return false;
  }
  catch (e) {
    return (e instanceof TypeError); 
  }
 }
runTestCase(testcase);