src/third_party/closure_library/closure/goog/string/const_test.js

// Copyright 2013 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

/**
 * @fileoverview Unit tests for goog.string.Const.
 */

goog.provide('goog.string.constTest');

goog.require('goog.string.Const');
goog.require('goog.testing.jsunit');

goog.setTestOnly('goog.string.constTest');



function testConst() {
  var constString = goog.string.Const.from('blah');
  var extracted = goog.string.Const.unwrap(constString);
  assertEquals('blah', extracted);
  assertEquals('blah', constString.getTypedStringValue());
  assertEquals('Const{blah}', String(constString));

  // Interface marker is present.
  assertTrue(constString.implementsGoogStringTypedString);
}


/** @suppress {checkTypes} */
function testUnwrap() {
  var evil = {};
  evil.constStringValueWithSecurityContract__googStringSecurityPrivate_ =
      'evil';
  evil.CONST_STRING_TYPE_MARKER__GOOG_STRING_SECURITY_PRIVATE_ = {};

  var exception = assertThrows(function() {
    goog.string.Const.unwrap(evil);
  });
  assertTrue(exception.message.indexOf('expected object of type Const') > 0);
}