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diff --git a/node_modules/util/test/node/util.js b/node_modules/util/test/node/util.js
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+++ b/node_modules/util/test/node/util.js
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+// Copyright Joyent, Inc. and other Node contributors.
+//
+// Permission is hereby granted, free of charge, to any person obtaining a
+// copy of this software and associated documentation files (the
+// "Software"), to deal in the Software without restriction, including
+// without limitation the rights to use, copy, modify, merge, publish,
+// distribute, sublicense, and/or sell copies of the Software, and to permit
+// persons to whom the Software is furnished to do so, subject to the
+// following conditions:
+//
+// The above copyright notice and this permission notice shall be included
+// in all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
+// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
+// USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+
+var assert = require('assert');
+var context = require('vm').runInNewContext;
+
+var util = require('../../');
+
+// isArray
+assert.equal(true, util.isArray([]));
+assert.equal(true, util.isArray(Array()));
+assert.equal(true, util.isArray(new Array()));
+assert.equal(true, util.isArray(new Array(5)));
+assert.equal(true, util.isArray(new Array('with', 'some', 'entries')));
+assert.equal(true, util.isArray(context('Array')()));
+assert.equal(false, util.isArray({}));
+assert.equal(false, util.isArray({ push: function() {} }));
+assert.equal(false, util.isArray(/regexp/));
+assert.equal(false, util.isArray(new Error));
+assert.equal(false, util.isArray(Object.create(Array.prototype)));
+
+// isRegExp
+assert.equal(true, util.isRegExp(/regexp/));
+assert.equal(true, util.isRegExp(RegExp()));
+assert.equal(true, util.isRegExp(new RegExp()));
+assert.equal(true, util.isRegExp(context('RegExp')()));
+assert.equal(false, util.isRegExp({}));
+assert.equal(false, util.isRegExp([]));
+assert.equal(false, util.isRegExp(new Date()));
+assert.equal(false, util.isRegExp(Object.create(RegExp.prototype)));
+
+// isDate
+assert.equal(true, util.isDate(new Date()));
+assert.equal(true, util.isDate(new Date(0)));
+assert.equal(true, util.isDate(new (context('Date'))));
+assert.equal(false, util.isDate(Date()));
+assert.equal(false, util.isDate({}));
+assert.equal(false, util.isDate([]));
+assert.equal(false, util.isDate(new Error));
+assert.equal(false, util.isDate(Object.create(Date.prototype)));
+
+// isError
+assert.equal(true, util.isError(new Error));
+assert.equal(true, util.isError(new TypeError));
+assert.equal(true, util.isError(new SyntaxError));
+assert.equal(true, util.isError(new (context('Error'))));
+assert.equal(true, util.isError(new (context('TypeError'))));
+assert.equal(true, util.isError(new (context('SyntaxError'))));
+assert.equal(false, util.isError({}));
+assert.equal(false, util.isError({ name: 'Error', message: '' }));
+assert.equal(false, util.isError([]));
+assert.equal(true, util.isError(Object.create(Error.prototype)));
+
+// isObject
+assert.ok(util.isObject({}) === true);
+
+// _extend
+assert.deepEqual(util._extend({a:1}),             {a:1});
+assert.deepEqual(util._extend({a:1}, []),         {a:1});
+assert.deepEqual(util._extend({a:1}, null),       {a:1});
+assert.deepEqual(util._extend({a:1}, true),       {a:1});
+assert.deepEqual(util._extend({a:1}, false),      {a:1});
+assert.deepEqual(util._extend({a:1}, {b:2}),      {a:1, b:2});
+assert.deepEqual(util._extend({a:1, b:2}, {b:3}), {a:1, b:3});