text: // Copyright (c) 2011 Jxck
  //
  // Originally from node.js (http://nodejs.org)
  // 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.
  
  if(typeof require === 'function') {
    var assert = require('../assert');
    var a = require('../assert');
  } else {
    var a = assert;
  };
  
  var common = {
    protoCtrChain: function(o) {
      var result = [];
      for (; o; o = o.__proto__) { result.push(o.constructor); }
      return result.join();
    },
    indirectInstanceOf: function(obj, cls) {
      if (obj instanceof cls) { return true; }
      var clsChain = protoCtrChain(cls.prototype);
      var objChain = protoCtrChain(obj);
      return objChain.slice(-clsChain.length) === clsChain;
    }
  };
  
  function makeBlock(f) {
    var args = Array.prototype.slice.call(arguments, 1);
    return function() {
      return f.apply(this, args);
    };
  }
  
  assert.ok(common.indirectInstanceOf(a.AssertionError.prototype, Error),
            'a.AssertionError instanceof Error');
  
  assert.throws(makeBlock(a, false), a.AssertionError, 'ok(false)');
  
  assert.doesNotThrow(makeBlock(a, true), a.AssertionError, 'ok(true)');
  
  assert.doesNotThrow(makeBlock(a, 'test', 'ok(\'test\')'));
  
  assert.throws(makeBlock(a.ok, false),
                a.AssertionError, 'ok(false)');
  
  assert.doesNotThrow(makeBlock(a.ok, true),
                      a.AssertionError, 'ok(true)');
  
  assert.doesNotThrow(makeBlock(a.ok, 'test'), 'ok(\'test\')');
  
  assert.throws(makeBlock(a.equal, true, false), a.AssertionError, 'equal');
  
  assert.doesNotThrow(makeBlock(a.equal, null, null), 'equal');
  
  assert.doesNotThrow(makeBlock(a.equal, undefined, undefined), 'equal');
  
  assert.doesNotThrow(makeBlock(a.equal, null, undefined), 'equal');
  
  assert.doesNotThrow(makeBlock(a.equal, true, true), 'equal');
  
  assert.doesNotThrow(makeBlock(a.equal, 2, '2'), 'equal');
  
  assert.doesNotThrow(makeBlock(a.notEqual, true, false), 'notEqual');
  
  assert.throws(makeBlock(a.notEqual, true, true),
                a.AssertionError, 'notEqual');
  
  assert.throws(makeBlock(a.strictEqual, 2, '2'),
                a.AssertionError, 'strictEqual');
  
  assert.throws(makeBlock(a.strictEqual, null, undefined),
                a.AssertionError, 'strictEqual');
  
  assert.doesNotThrow(makeBlock(a.notStrictEqual, 2, '2'), 'notStrictEqual');
  
  // deepEquals joy!
  // 7.2
  assert.doesNotThrow(makeBlock(a.deepEqual, new Date(2000, 3, 14),
                      new Date(2000, 3, 14)), 'deepEqual date');
  
  assert.throws(makeBlock(a.deepEqual, new Date(), new Date(2000, 3, 14)),
                a.AssertionError,
                'deepEqual date');
  
  // 7.3
  assert.doesNotThrow(makeBlock(a.deepEqual, 4, '4'), 'deepEqual == check');
  assert.doesNotThrow(makeBlock(a.deepEqual, true, 1), 'deepEqual == check');
  assert.throws(makeBlock(a.deepEqual, 4, '5'),
                a.AssertionError,
                'deepEqual == check');
  
  // 7.4
  // having the same number of owned properties && the same set of keys
  assert.doesNotThrow(makeBlock(a.deepEqual, {a: 4}, {a: 4}));
  assert.doesNotThrow(makeBlock(a.deepEqual, {a: 4, b: '2'}, {a: 4, b: '2'}));
  assert.doesNotThrow(makeBlock(a.deepEqual, [4], ['4']));
  assert.throws(makeBlock(a.deepEqual, {a: 4}, {a: 4, b: true}),
                a.AssertionError);
  assert.doesNotThrow(makeBlock(a.deepEqual, ['a'], {0: 'a'}));
  //(although not necessarily the same order),
  assert.doesNotThrow(makeBlock(a.deepEqual, {a: 4, b: '1'}, {b: '1', a: 4}));
  var a1 = [1, 2, 3];
  var a2 = [1, 2, 3];
  a1.a = 'test';
  a1.b = true;
  a2.b = true;
  a2.a = 'test';
  assert.throws(makeBlock(a.deepEqual, Object.keys(a1), Object.keys(a2)),
                a.AssertionError);
  assert.doesNotThrow(makeBlock(a.deepEqual, a1, a2));
  
  // having an identical prototype property
  var nbRoot = {
    toString: function() { return this.first + ' ' + this.last; }
  };
  
  function nameBuilder(first, last) {
    this.first = first;
    this.last = last;
    return this;
  }
  nameBuilder.prototype = nbRoot;
  
  function nameBuilder2(first, last) {
    this.first = first;
    this.last = last;
    return this;
  }
  nameBuilder2.prototype = nbRoot;
  
  var nb1 = new nameBuilder('Ryan', 'Dahl');
  var nb2 = new nameBuilder2('Ryan', 'Dahl');
  
  assert.doesNotThrow(makeBlock(a.deepEqual, nb1, nb2));
  
  nameBuilder2.prototype = Object;
  nb2 = new nameBuilder2('Ryan', 'Dahl');
  assert.throws(makeBlock(a.deepEqual, nb1, nb2), a.AssertionError);
  
  // String literal + object blew up my implementation...
  assert.throws(makeBlock(a.deepEqual, 'a', {}), a.AssertionError);
  
  // Testing the throwing
  function thrower(errorConstructor) {
    throw new errorConstructor('test');
  }
  var aethrow = makeBlock(thrower, a.AssertionError);
  aethrow = makeBlock(thrower, a.AssertionError);
  
  // the basic calls work
  assert.throws(makeBlock(thrower, a.AssertionError),
                a.AssertionError, 'message');
  assert.throws(makeBlock(thrower, a.AssertionError), a.AssertionError);
  assert.throws(makeBlock(thrower, a.AssertionError));
  
  // if not passing an error, catch all.
  assert.throws(makeBlock(thrower, TypeError));
  
  // when passing a type, only catch errors of the appropriate type
  var threw = false;
  try {
    a.throws(makeBlock(thrower, TypeError), a.AssertionError);
  } catch (e) {
    threw = true;
    assert.ok(e instanceof TypeError, 'type');
  }
  assert.equal(true, threw,
               'a.throws with an explicit error is eating extra errors',
               a.AssertionError);
  threw = false;
  
  // doesNotThrow should pass through all errors
  try {
    a.doesNotThrow(makeBlock(thrower, TypeError), a.AssertionError);
  } catch (e) {
    threw = true;
    assert.ok(e instanceof TypeError);
  }
  assert.equal(true, threw,
               'a.doesNotThrow with an explicit error is eating extra errors');
  
  // key difference is that throwing our correct error makes an assertion error
  try {
    a.doesNotThrow(makeBlock(thrower, TypeError), TypeError);
  } catch (e) {
    threw = true;
    assert.ok(e instanceof a.AssertionError);
  }
  assert.equal(true, threw,
               'a.doesNotThrow is not catching type matching errors');
  
  assert.throws(function() {assert.ifError(new Error('test error'))});
  assert.doesNotThrow(function() {assert.ifError(null)});
  assert.doesNotThrow(function() {assert.ifError()});
  
  // make sure that validating using constructor really works
  threw = false;
  try {
    assert.throws(
        function() {
          throw {}
        },
        Array
    );
  } catch (e) {
    threw = true;
  }
  assert.ok(threw, 'wrong constructor validation');
  
  // use a RegExp to validate error message
  a.throws(makeBlock(thrower, TypeError), /test/);
  
  // use a fn to validate error object
  a.throws(makeBlock(thrower, TypeError), function(err) {
    if ((err instanceof TypeError) && /test/.test(err)) {
      return true;
    }
  });
  
  
  // GH-207. Make sure deepEqual doesn't loop forever on circular refs
  
  var b = {};
  b.b = b;
  
  var c = {};
  c.b = c;
  
  var gotError = false;
  try {
    assert.deepEqual(b, c);
  } catch (e) {
    gotError = true;
  }
  
  console.log('All OK');
  assert.ok(gotError);
  
  
  // #217
  function testAssertionMessage(actual, expected) {
    try {
      assert.equal(actual, '');
    } catch (e) {
      assert.equal(e.toString(),
          ['AssertionError:', expected, '==', '""'].join(' '));
    }
  }
  testAssertionMessage(undefined, '"undefined"');
  testAssertionMessage(null, 'null');
  testAssertionMessage(true, 'true');
  testAssertionMessage(false, 'false');
  testAssertionMessage(0, '0');
  testAssertionMessage(100, '100');
  testAssertionMessage(NaN, '"NaN"');
  testAssertionMessage(Infinity, '"Infinity"');
  testAssertionMessage(-Infinity, '"-Infinity"');
  testAssertionMessage('', '""');
  testAssertionMessage('foo', '"foo"');
  testAssertionMessage([], '[]');
  testAssertionMessage([1, 2, 3], '[1,2,3]');
  testAssertionMessage(/a/, '"/a/"');
  testAssertionMessage(/abc/gim, '"/abc/gim"');
  testAssertionMessage(function f() {}, '"function f() {}"');
  testAssertionMessage({}, '{}');
  testAssertionMessage({a: undefined, b: null}, '{"a":"undefined","b":null}');
  testAssertionMessage({a: NaN, b: Infinity, c: -Infinity},
      '{"a":"NaN","b":"Infinity","c":"-Infinity"}');
  
  