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							506 lines
						
					
					
						
							16 KiB
						
					
					
				'use strict'; | 
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 | 
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var objectAssign = require('object-assign'); | 
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 | 
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// compare and isBuffer taken from https://github.com/feross/buffer/blob/680e9e5e488f22aac27599a57dc844a6315928dd/index.js | 
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// original notice: | 
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 | 
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/*! | 
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 * The buffer module from node.js, for the browser. | 
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 * | 
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 * @author   Feross Aboukhadijeh <feross@feross.org> <http://feross.org> | 
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 * @license  MIT | 
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 */ | 
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function compare(a, b) { | 
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  if (a === b) { | 
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    return 0; | 
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  } | 
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 | 
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  var x = a.length; | 
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  var y = b.length; | 
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 | 
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  for (var i = 0, len = Math.min(x, y); i < len; ++i) { | 
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    if (a[i] !== b[i]) { | 
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      x = a[i]; | 
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      y = b[i]; | 
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      break; | 
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    } | 
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  } | 
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 | 
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  if (x < y) { | 
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    return -1; | 
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  } | 
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  if (y < x) { | 
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    return 1; | 
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  } | 
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  return 0; | 
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} | 
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function isBuffer(b) { | 
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  if (global.Buffer && typeof global.Buffer.isBuffer === 'function') { | 
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    return global.Buffer.isBuffer(b); | 
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  } | 
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  return !!(b != null && b._isBuffer); | 
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} | 
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 | 
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// based on node assert, original notice: | 
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// NB: The URL to the CommonJS spec is kept just for tradition. | 
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//     node-assert has evolved a lot since then, both in API and behavior. | 
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 | 
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// http://wiki.commonjs.org/wiki/Unit_Testing/1.0 | 
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// | 
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// THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8! | 
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// | 
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// Originally from narwhal.js (http://narwhaljs.org) | 
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// Copyright (c) 2009 Thomas Robinson <280north.com> | 
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// | 
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// Permission is hereby granted, free of charge, to any person obtaining a copy | 
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// of this software and associated documentation files (the 'Software'), to | 
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// deal in the Software without restriction, including without limitation the | 
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// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or | 
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// sell copies of the Software, and to permit persons to whom the Software is | 
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// furnished to do so, subject to the following conditions: | 
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// | 
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// The above copyright notice and this permission notice shall be included in | 
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// all copies or substantial portions of the Software. | 
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// | 
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// THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | 
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | 
						|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | 
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// AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN | 
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// ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION | 
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// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | 
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 | 
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var util = require('util/'); | 
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var hasOwn = Object.prototype.hasOwnProperty; | 
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var pSlice = Array.prototype.slice; | 
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var functionsHaveNames = (function () { | 
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  return function foo() {}.name === 'foo'; | 
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}()); | 
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function pToString (obj) { | 
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  return Object.prototype.toString.call(obj); | 
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} | 
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function isView(arrbuf) { | 
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  if (isBuffer(arrbuf)) { | 
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    return false; | 
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  } | 
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  if (typeof global.ArrayBuffer !== 'function') { | 
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    return false; | 
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  } | 
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  if (typeof ArrayBuffer.isView === 'function') { | 
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    return ArrayBuffer.isView(arrbuf); | 
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  } | 
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  if (!arrbuf) { | 
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    return false; | 
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  } | 
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  if (arrbuf instanceof DataView) { | 
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    return true; | 
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  } | 
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  if (arrbuf.buffer && arrbuf.buffer instanceof ArrayBuffer) { | 
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    return true; | 
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  } | 
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  return false; | 
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} | 
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// 1. The assert module provides functions that throw | 
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// AssertionError's when particular conditions are not met. The | 
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// assert module must conform to the following interface. | 
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 | 
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var assert = module.exports = ok; | 
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 | 
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// 2. The AssertionError is defined in assert. | 
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// new assert.AssertionError({ message: message, | 
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//                             actual: actual, | 
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//                             expected: expected }) | 
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 | 
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var regex = /\s*function\s+([^\(\s]*)\s*/; | 
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// based on https://github.com/ljharb/function.prototype.name/blob/adeeeec8bfcc6068b187d7d9fb3d5bb1d3a30899/implementation.js | 
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function getName(func) { | 
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  if (!util.isFunction(func)) { | 
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    return; | 
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  } | 
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  if (functionsHaveNames) { | 
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    return func.name; | 
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  } | 
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  var str = func.toString(); | 
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  var match = str.match(regex); | 
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  return match && match[1]; | 
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} | 
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assert.AssertionError = function AssertionError(options) { | 
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  this.name = 'AssertionError'; | 
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  this.actual = options.actual; | 
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  this.expected = options.expected; | 
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  this.operator = options.operator; | 
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  if (options.message) { | 
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    this.message = options.message; | 
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    this.generatedMessage = false; | 
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  } else { | 
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    this.message = getMessage(this); | 
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    this.generatedMessage = true; | 
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  } | 
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  var stackStartFunction = options.stackStartFunction || fail; | 
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  if (Error.captureStackTrace) { | 
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    Error.captureStackTrace(this, stackStartFunction); | 
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  } else { | 
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    // non v8 browsers so we can have a stacktrace | 
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    var err = new Error(); | 
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    if (err.stack) { | 
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      var out = err.stack; | 
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 | 
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      // try to strip useless frames | 
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      var fn_name = getName(stackStartFunction); | 
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      var idx = out.indexOf('\n' + fn_name); | 
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      if (idx >= 0) { | 
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        // once we have located the function frame | 
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        // we need to strip out everything before it (and its line) | 
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        var next_line = out.indexOf('\n', idx + 1); | 
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        out = out.substring(next_line + 1); | 
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      } | 
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 | 
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      this.stack = out; | 
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    } | 
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  } | 
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}; | 
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 | 
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// assert.AssertionError instanceof Error | 
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util.inherits(assert.AssertionError, Error); | 
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 | 
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function truncate(s, n) { | 
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  if (typeof s === 'string') { | 
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    return s.length < n ? s : s.slice(0, n); | 
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  } else { | 
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    return s; | 
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  } | 
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} | 
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function inspect(something) { | 
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  if (functionsHaveNames || !util.isFunction(something)) { | 
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    return util.inspect(something); | 
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  } | 
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  var rawname = getName(something); | 
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  var name = rawname ? ': ' + rawname : ''; | 
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  return '[Function' +  name + ']'; | 
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} | 
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function getMessage(self) { | 
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  return truncate(inspect(self.actual), 128) + ' ' + | 
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         self.operator + ' ' + | 
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         truncate(inspect(self.expected), 128); | 
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} | 
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 | 
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// At present only the three keys mentioned above are used and | 
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// understood by the spec. Implementations or sub modules can pass | 
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// other keys to the AssertionError's constructor - they will be | 
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// ignored. | 
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 | 
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// 3. All of the following functions must throw an AssertionError | 
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// when a corresponding condition is not met, with a message that | 
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// may be undefined if not provided.  All assertion methods provide | 
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// both the actual and expected values to the assertion error for | 
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// display purposes. | 
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 | 
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function fail(actual, expected, message, operator, stackStartFunction) { | 
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  throw new assert.AssertionError({ | 
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    message: message, | 
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    actual: actual, | 
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    expected: expected, | 
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    operator: operator, | 
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    stackStartFunction: stackStartFunction | 
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  }); | 
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} | 
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 | 
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// EXTENSION! allows for well behaved errors defined elsewhere. | 
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assert.fail = fail; | 
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 | 
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// 4. Pure assertion tests whether a value is truthy, as determined | 
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// by !!guard. | 
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// assert.ok(guard, message_opt); | 
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// This statement is equivalent to assert.equal(true, !!guard, | 
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// message_opt);. To test strictly for the value true, use | 
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// assert.strictEqual(true, guard, message_opt);. | 
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 | 
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function ok(value, message) { | 
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  if (!value) fail(value, true, message, '==', assert.ok); | 
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} | 
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assert.ok = ok; | 
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 | 
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// 5. The equality assertion tests shallow, coercive equality with | 
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// ==. | 
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// assert.equal(actual, expected, message_opt); | 
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 | 
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assert.equal = function equal(actual, expected, message) { | 
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  if (actual != expected) fail(actual, expected, message, '==', assert.equal); | 
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}; | 
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 | 
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// 6. The non-equality assertion tests for whether two objects are not equal | 
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// with != assert.notEqual(actual, expected, message_opt); | 
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 | 
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assert.notEqual = function notEqual(actual, expected, message) { | 
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  if (actual == expected) { | 
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    fail(actual, expected, message, '!=', assert.notEqual); | 
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  } | 
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}; | 
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 | 
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// 7. The equivalence assertion tests a deep equality relation. | 
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// assert.deepEqual(actual, expected, message_opt); | 
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 | 
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assert.deepEqual = function deepEqual(actual, expected, message) { | 
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  if (!_deepEqual(actual, expected, false)) { | 
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    fail(actual, expected, message, 'deepEqual', assert.deepEqual); | 
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  } | 
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}; | 
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 | 
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assert.deepStrictEqual = function deepStrictEqual(actual, expected, message) { | 
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  if (!_deepEqual(actual, expected, true)) { | 
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    fail(actual, expected, message, 'deepStrictEqual', assert.deepStrictEqual); | 
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  } | 
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}; | 
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 | 
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function _deepEqual(actual, expected, strict, memos) { | 
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  // 7.1. All identical values are equivalent, as determined by ===. | 
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  if (actual === expected) { | 
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    return true; | 
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  } else if (isBuffer(actual) && isBuffer(expected)) { | 
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    return compare(actual, expected) === 0; | 
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 | 
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  // 7.2. If the expected value is a Date object, the actual value is | 
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  // equivalent if it is also a Date object that refers to the same time. | 
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  } else if (util.isDate(actual) && util.isDate(expected)) { | 
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    return actual.getTime() === expected.getTime(); | 
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 | 
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  // 7.3 If the expected value is a RegExp object, the actual value is | 
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  // equivalent if it is also a RegExp object with the same source and | 
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  // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`). | 
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  } else if (util.isRegExp(actual) && util.isRegExp(expected)) { | 
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    return actual.source === expected.source && | 
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           actual.global === expected.global && | 
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           actual.multiline === expected.multiline && | 
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           actual.lastIndex === expected.lastIndex && | 
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           actual.ignoreCase === expected.ignoreCase; | 
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 | 
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  // 7.4. Other pairs that do not both pass typeof value == 'object', | 
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  // equivalence is determined by ==. | 
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  } else if ((actual === null || typeof actual !== 'object') && | 
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             (expected === null || typeof expected !== 'object')) { | 
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    return strict ? actual === expected : actual == expected; | 
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 | 
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  // If both values are instances of typed arrays, wrap their underlying | 
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  // ArrayBuffers in a Buffer each to increase performance | 
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  // This optimization requires the arrays to have the same type as checked by | 
						|
  // Object.prototype.toString (aka pToString). Never perform binary | 
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  // comparisons for Float*Arrays, though, since e.g. +0 === -0 but their | 
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  // bit patterns are not identical. | 
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  } else if (isView(actual) && isView(expected) && | 
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             pToString(actual) === pToString(expected) && | 
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             !(actual instanceof Float32Array || | 
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               actual instanceof Float64Array)) { | 
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    return compare(new Uint8Array(actual.buffer), | 
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                   new Uint8Array(expected.buffer)) === 0; | 
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 | 
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  // 7.5 For all other Object pairs, including Array objects, equivalence is | 
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  // determined by having the same number of owned properties (as verified | 
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  // with Object.prototype.hasOwnProperty.call), the same set of keys | 
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  // (although not necessarily the same order), equivalent values for every | 
						|
  // corresponding key, and an identical 'prototype' property. Note: this | 
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  // accounts for both named and indexed properties on Arrays. | 
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  } else if (isBuffer(actual) !== isBuffer(expected)) { | 
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    return false; | 
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  } else { | 
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    memos = memos || {actual: [], expected: []}; | 
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 | 
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    var actualIndex = memos.actual.indexOf(actual); | 
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    if (actualIndex !== -1) { | 
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      if (actualIndex === memos.expected.indexOf(expected)) { | 
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        return true; | 
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      } | 
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    } | 
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 | 
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    memos.actual.push(actual); | 
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    memos.expected.push(expected); | 
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 | 
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    return objEquiv(actual, expected, strict, memos); | 
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  } | 
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} | 
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 | 
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function isArguments(object) { | 
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  return Object.prototype.toString.call(object) == '[object Arguments]'; | 
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} | 
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 | 
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function objEquiv(a, b, strict, actualVisitedObjects) { | 
						|
  if (a === null || a === undefined || b === null || b === undefined) | 
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    return false; | 
						|
  // if one is a primitive, the other must be same | 
						|
  if (util.isPrimitive(a) || util.isPrimitive(b)) | 
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    return a === b; | 
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  if (strict && Object.getPrototypeOf(a) !== Object.getPrototypeOf(b)) | 
						|
    return false; | 
						|
  var aIsArgs = isArguments(a); | 
						|
  var bIsArgs = isArguments(b); | 
						|
  if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs)) | 
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    return false; | 
						|
  if (aIsArgs) { | 
						|
    a = pSlice.call(a); | 
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    b = pSlice.call(b); | 
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    return _deepEqual(a, b, strict); | 
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  } | 
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  var ka = objectKeys(a); | 
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  var kb = objectKeys(b); | 
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  var key, i; | 
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  // having the same number of owned properties (keys incorporates | 
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  // hasOwnProperty) | 
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  if (ka.length !== kb.length) | 
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    return false; | 
						|
  //the same set of keys (although not necessarily the same order), | 
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  ka.sort(); | 
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  kb.sort(); | 
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  //~~~cheap key test | 
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  for (i = ka.length - 1; i >= 0; i--) { | 
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    if (ka[i] !== kb[i]) | 
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      return false; | 
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  } | 
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  //equivalent values for every corresponding key, and | 
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  //~~~possibly expensive deep test | 
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  for (i = ka.length - 1; i >= 0; i--) { | 
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    key = ka[i]; | 
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    if (!_deepEqual(a[key], b[key], strict, actualVisitedObjects)) | 
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      return false; | 
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  } | 
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  return true; | 
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} | 
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 | 
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// 8. The non-equivalence assertion tests for any deep inequality. | 
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// assert.notDeepEqual(actual, expected, message_opt); | 
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 | 
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assert.notDeepEqual = function notDeepEqual(actual, expected, message) { | 
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  if (_deepEqual(actual, expected, false)) { | 
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    fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual); | 
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  } | 
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}; | 
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 | 
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assert.notDeepStrictEqual = notDeepStrictEqual; | 
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function notDeepStrictEqual(actual, expected, message) { | 
						|
  if (_deepEqual(actual, expected, true)) { | 
						|
    fail(actual, expected, message, 'notDeepStrictEqual', notDeepStrictEqual); | 
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  } | 
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} | 
						|
 | 
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 | 
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// 9. The strict equality assertion tests strict equality, as determined by ===. | 
						|
// assert.strictEqual(actual, expected, message_opt); | 
						|
 | 
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assert.strictEqual = function strictEqual(actual, expected, message) { | 
						|
  if (actual !== expected) { | 
						|
    fail(actual, expected, message, '===', assert.strictEqual); | 
						|
  } | 
						|
}; | 
						|
 | 
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// 10. The strict non-equality assertion tests for strict inequality, as | 
						|
// determined by !==.  assert.notStrictEqual(actual, expected, message_opt); | 
						|
 | 
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assert.notStrictEqual = function notStrictEqual(actual, expected, message) { | 
						|
  if (actual === expected) { | 
						|
    fail(actual, expected, message, '!==', assert.notStrictEqual); | 
						|
  } | 
						|
}; | 
						|
 | 
						|
function expectedException(actual, expected) { | 
						|
  if (!actual || !expected) { | 
						|
    return false; | 
						|
  } | 
						|
 | 
						|
  if (Object.prototype.toString.call(expected) == '[object RegExp]') { | 
						|
    return expected.test(actual); | 
						|
  } | 
						|
 | 
						|
  try { | 
						|
    if (actual instanceof expected) { | 
						|
      return true; | 
						|
    } | 
						|
  } catch (e) { | 
						|
    // Ignore.  The instanceof check doesn't work for arrow functions. | 
						|
  } | 
						|
 | 
						|
  if (Error.isPrototypeOf(expected)) { | 
						|
    return false; | 
						|
  } | 
						|
 | 
						|
  return expected.call({}, actual) === true; | 
						|
} | 
						|
 | 
						|
function _tryBlock(block) { | 
						|
  var error; | 
						|
  try { | 
						|
    block(); | 
						|
  } catch (e) { | 
						|
    error = e; | 
						|
  } | 
						|
  return error; | 
						|
} | 
						|
 | 
						|
function _throws(shouldThrow, block, expected, message) { | 
						|
  var actual; | 
						|
 | 
						|
  if (typeof block !== 'function') { | 
						|
    throw new TypeError('"block" argument must be a function'); | 
						|
  } | 
						|
 | 
						|
  if (typeof expected === 'string') { | 
						|
    message = expected; | 
						|
    expected = null; | 
						|
  } | 
						|
 | 
						|
  actual = _tryBlock(block); | 
						|
 | 
						|
  message = (expected && expected.name ? ' (' + expected.name + ').' : '.') + | 
						|
            (message ? ' ' + message : '.'); | 
						|
 | 
						|
  if (shouldThrow && !actual) { | 
						|
    fail(actual, expected, 'Missing expected exception' + message); | 
						|
  } | 
						|
 | 
						|
  var userProvidedMessage = typeof message === 'string'; | 
						|
  var isUnwantedException = !shouldThrow && util.isError(actual); | 
						|
  var isUnexpectedException = !shouldThrow && actual && !expected; | 
						|
 | 
						|
  if ((isUnwantedException && | 
						|
      userProvidedMessage && | 
						|
      expectedException(actual, expected)) || | 
						|
      isUnexpectedException) { | 
						|
    fail(actual, expected, 'Got unwanted exception' + message); | 
						|
  } | 
						|
 | 
						|
  if ((shouldThrow && actual && expected && | 
						|
      !expectedException(actual, expected)) || (!shouldThrow && actual)) { | 
						|
    throw actual; | 
						|
  } | 
						|
} | 
						|
 | 
						|
// 11. Expected to throw an error: | 
						|
// assert.throws(block, Error_opt, message_opt); | 
						|
 | 
						|
assert.throws = function(block, /*optional*/error, /*optional*/message) { | 
						|
  _throws(true, block, error, message); | 
						|
}; | 
						|
 | 
						|
// EXTENSION! This is annoying to write outside this module. | 
						|
assert.doesNotThrow = function(block, /*optional*/error, /*optional*/message) { | 
						|
  _throws(false, block, error, message); | 
						|
}; | 
						|
 | 
						|
assert.ifError = function(err) { if (err) throw err; }; | 
						|
 | 
						|
// Expose a strict only variant of assert | 
						|
function strict(value, message) { | 
						|
  if (!value) fail(value, true, message, '==', strict); | 
						|
} | 
						|
assert.strict = objectAssign(strict, assert, { | 
						|
  equal: assert.strictEqual, | 
						|
  deepEqual: assert.deepStrictEqual, | 
						|
  notEqual: assert.notStrictEqual, | 
						|
  notDeepEqual: assert.notDeepStrictEqual | 
						|
}); | 
						|
assert.strict.strict = assert.strict; | 
						|
 | 
						|
var objectKeys = Object.keys || function (obj) { | 
						|
  var keys = []; | 
						|
  for (var key in obj) { | 
						|
    if (hasOwn.call(obj, key)) keys.push(key); | 
						|
  } | 
						|
  return keys; | 
						|
};
 | 
						|
 |