text: /* global describe, it, xit, expect, beforeEach, jasmine */
  
  describe('Date', function () {
      'use strict';
  
      var supportsDescriptors = Object.defineProperty && (function () {
          try {
              var obj = {};
              Object.defineProperty(obj, 'x', {
                  enumerable: false,
                  value: obj
              });
              for (var _ in obj) {
                  return false;
              }
              return obj.x === obj;
          } catch (e) { /* this is ES3 */
              return false;
          }
      }());
      var ifSupportsDescriptorsIt = supportsDescriptors ? it : xit;
      var has = Object.prototype.hasOwnProperty;
  
      var negativeDate;
      beforeEach(function () {
          var negativeCanned = [
              {
                  getTime: -3509827329600292,
                  getUTCDay: 4,
                  getDay: 4,
                  dim: 31
              },
              {
                  getTime: -3509824651200292,
                  getUTCDay: 0,
                  getDay: 0,
                  dim: 29
              },
              {
                  getTime: -3509822145600292,
                  getUTCDay: 1,
                  getDay: 1,
                  dim: 31
              },
              {
                  getTime: -3509819467200292,
                  getUTCDay: 4,
                  getDay: 4,
                  dim: 30
              },
              {
                  getTime: -3509816875200292,
                  getUTCDay: 6,
                  getDay: 6,
                  dim: 31
              },
              {
                  getTime: -3509814196800292,
                  getUTCDay: 2,
                  getDay: 2,
                  dim: 30
              },
              {
                  getTime: -3509811604800292,
                  getUTCDay: 4,
                  getDay: 4,
                  dim: 31
              },
              {
                  getTime: -3509808926400292,
                  getUTCDay: 0,
                  getDay: 0,
                  dim: 31
              },
              {
                  getTime: -3509806248000292,
                  getUTCDay: 3,
                  getDay: 3,
                  dim: 30
              },
              {
                  getTime: -3509803656000292,
                  getUTCDay: 5,
                  getDay: 5,
                  dim: 31
              },
              {
                  getTime: -3509800977600292,
                  getUTCDay: 1,
                  getDay: 1,
                  dim: 30
              },
              {
                  getTime: -3509798385600292,
                  getUTCDay: 3,
                  getDay: 3,
                  dim: 31
              }
          ];
          negativeDate = negativeCanned.map(function (item) {
              var dateFirst = new Date(item.getTime);
              var dateLast = new Date(item.getTime + ((item.dim - 1) * 86400000));
              return {
                  dates: [dateFirst, dateLast],
                  days: [1, item.dim],
                  getUTCDay: [item.getUTCDay, (item.getUTCDay + item.dim - 1) % 7],
                  getDay: [item.getDay, (item.getDay + item.dim - 1) % 7]
              };
          });
      });
  
      describe('.now()', function () {
          it('should be the current time', function () {
              var before = (new Date()).getTime();
              var middle = Date.now();
              var after = (new Date()).getTime();
              expect(middle).not.toBeLessThan(before);
              expect(middle).not.toBeGreaterThan(after);
          });
      });
  
      describe('constructor', function () {
          it('works with standard formats', function () {
              //    Chrome 19     Opera 12      Firefox 11    IE 9          Safari 5.1.1
              expect(+new Date('2012-12-31T23:59:59.000Z')).toBe(1356998399000); //    1356998399000 1356998399000 1356998399000 1356998399000 1356998399000
              expect(+new Date('2012-04-04T05:02:02.170Z')).toBe(1333515722170); //    1333515722170 1333515722170 1333515722170 1333515722170 1333515722170
              expect(+new Date('2012-04-04T05:02:02.170999Z')).toBe(1333515722170); // 1333515722170 1333515722170 1333515722170 1333515722170 1333515722170
              expect(+new Date('2012-04-04T05:02:02.17Z')).toBe(1333515722170); //     1333515722170 1333515722170 1333515722170 1333515722170 1333515722170
              expect(+new Date('2012-04-04T05:02:02.1Z')).toBe(1333515722100); //      1333515722170 1333515722170 1333515722170 1333515722170 1333515722170
              expect(+new Date('2012-04-04T24:00:00.000Z')).toBe(1333584000000); //    NaN           1333584000000 1333584000000 1333584000000 1333584000000
              expect(+new Date('2012-02-29T12:00:00.000Z')).toBe(1330516800000); //    1330516800000 1330516800000 1330516800000 1330516800000 1330516800000
              expect(+new Date('2011-03-01T12:00:00.000Z')).toBe(1298980800000); //    1298980800000 1298980800000 1298980800000 1298980800000 1298980800000
  
              // https://github.com/es-shims/es5-shim/issues/80 Safari bug with leap day
              expect(new Date('2034-03-01T00:00:00.000Z') -
                  new Date('2034-02-27T23:59:59.999Z')).toBe(86400001); //          86400001      86400001      86400001      86400001             1
  
          });
  
          ifSupportsDescriptorsIt('is not enumerable', function () {
              expect(Object.keys(new Date())).not.toContain('constructor');
          });
  
          it('works as a function', function () {
              var zeroDate = Date(0);
              expect(zeroDate).toBe(String(zeroDate));
              var value = Date(1441705534578);
              expect(value).toBe(String(value));
          });
  
          it('fixes this Safari 8/9 bug', function () {
              var offset = new Date(1970).getTimezoneOffset() * 60e3;
  
              var timestamp = 2147483647; // Math.pow(2, 31) - 1
              var date = new Date(1970, 0, 1, 0, 0, 0, timestamp);
              var expectedTimestamp = timestamp + offset;
              expect(date.getTime()).toBe(expectedTimestamp);
  
              var brokenTimestamp = 2147483648; // Math.pow(2, 31)
              var brokenDate = new Date(1970, 0, 1, 0, 0, 0, brokenTimestamp);
              var expectedBrokenTimestamp = brokenTimestamp + offset;
              expect(brokenDate.getTime()).toBe(expectedBrokenTimestamp); // NaN in Safari 8/9
  
              var veryBrokenTS = 1435734000000;
              var veryBrokenDate = new Date(1970, 0, 1, 0, 0, 0, veryBrokenTS);
              var largeDate = new Date('Wed Jul 01 2015 07:00:00 GMT-0700 (PDT)');
              var expectedVeryBrokenTS = veryBrokenTS + (largeDate.getTimezoneOffset() * 60e3);
              expect(veryBrokenDate.getTime()).toBe(expectedVeryBrokenTS); // NaN in Safari 8/9
          });
      });
  
      describe('.parse()', function () {
          // TODO: Write the rest of the test.
  
          ifSupportsDescriptorsIt('is not enumerable', function () {
              expect(Object.getOwnPropertyDescriptor(Date, 'parse').enumerable).toBe(false);
          });
  
          it('should be an invalid date', function () {
              //            Chrome 19     Opera 12      Firefox 11    IE 9          Safari 5.1.1
              expect(Date.parse('2012-11-31T23:59:59.000Z')).toBeFalsy(); //            1354406399000 NaN           NaN           1354406399000 NaN
              expect(Date.parse('2012-12-31T23:59:60.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           1356998400000
              expect(Date.parse('2012-04-04T24:00:00.500Z')).toBeFalsy(); //            NaN           NaN           1333584000500 1333584000500 NaN
              expect(Date.parse('2012-12-31T10:08:60.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           1356948540000
              expect(Date.parse('2012-13-01T12:00:00.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           NaN
              expect(Date.parse('2012-12-32T12:00:00.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           NaN
              expect(Date.parse('2012-12-31T25:00:00.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           NaN
              expect(Date.parse('2012-12-31T24:01:00.000Z')).toBeFalsy(); //            NaN           NaN           NaN           1356998460000 NaN
              expect(Date.parse('2012-12-31T12:60:00.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           NaN
              expect(Date.parse('2012-12-31T12:00:60.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           1356955260000
              expect(Date.parse('2012-00-31T23:59:59.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           NaN
              expect(Date.parse('2012-12-00T23:59:59.000Z')).toBeFalsy(); //            NaN           NaN           NaN           NaN           NaN
              expect(Date.parse('2011-02-29T12:00:00.000Z')).toBeFalsy(); //            1298980800000 NaN           NaN           1298980800000 NaN
          });
  
          it('should work', function () {
              var dates = {
                  //    Chrome 19     Opera 12      Firefox 11    IE 9          Safari 5.1.1  Safari 8
                  '2012-12-31T23:59:59.000Z': 1356998399000, //    1356998399000 1356998399000 1356998399000 1356998399000 1356998399000 1356998399000
                  '2012-04-04T05:02:02.170Z': 1333515722170, //    1333515722170 1333515722170 1333515722170 1333515722170 1333515722170 1333515722170
                  '2012-04-04T05:02:02.170999Z': 1333515722170, // 1333515722170 1333515722170 1333515722170 1333515722170 1333515722170 1333515722170.999
                  '2012-04-04T05:02:02.17Z': 1333515722170, //     1333515722170 1333515722170 1333515722170 1333515722170 1333515722170 1333515722170
                  '2012-04-04T05:02:02.1Z': 1333515722100, //      1333515722170 1333515722170 1333515722170 1333515722170 1333515722170 1333515722170
                  '2012-04-04T24:00:00.000Z': 1333584000000, //    NaN           1333584000000 1333584000000 1333584000000 1333584000000 1333584000000
                  '2012-02-29T12:00:00.000Z': 1330516800000, //    1330516800000 1330516800000 1330516800000 1330516800000 1330516800000 1330516800000
                  '2011-03-01T12:00:00.000Z': 1298980800000 //     1298980800000 1298980800000 1298980800000 1298980800000 1298980800000 1298980800000
              };
              for (var str in dates) {
                  if (has.call(dates, str)) {
                      expect(Math.floor(Date.parse(str))).toBe(dates[str]);
                  }
              }
  
              // https://github.com/es-shims/es5-shim/issues/80 Safari bug with leap day
              expect(Date.parse('2034-03-01T00:00:00.000Z') -
                  Date.parse('2034-02-27T23:59:59.999Z')).toBe(86400001); //         86400001      86400001      86400001      86400001             1
  
          });
  
          it('fixes a Safari 8/9 bug with parsing in UTC instead of local time', function () {
              var offset = new Date('2015-07-01').getTimezoneOffset() * 60e3;
              expect(Date.parse('2015-07-01T00:00:00')).toBe(1435708800000 + offset); // Safari 8/9 give NaN
          });
  
          it('should support extended years', function () {
              //    Chrome 19     Opera 12      Firefox 11    IE 9          Safari 5.1.1
              expect(Date.parse('0000-01-01T00:00:00.000Z')).toBe(-621672192e5); //   -621672192e5  -621672192e5  -621672192e5  -621672192e5  -621672192e5
              expect(Date.parse('0001-01-01T00:00:00Z')).toBe(-621355968e5); //       -621355968e5  -621355968e5  -621355968e5   8.64e15      -621355968e5
              expect(Date.parse('+275760-09-13T00:00:00.000Z')).toBe(8.64e15); //      8.64e15       NaN           8.64e15       8.64e15       8.64e15
              expect(Date.parse('-271821-04-20T00:00:00.000Z')).toBe(-8.64e15); //    -8.64e15       NaN          -8.64e15      -8.64e15      -8.6400000864e15
              expect(Date.parse('+275760-09-13T00:00:00.001Z')).toBeFalsy(); //        NaN           NaN           NaN           8.64e15 + 1   8.64e15 + 1
              expect(Date.parse('-271821-04-19T23:59:59.999Z')).toBeFalsy(); //        NaN           NaN           NaN          -8.64e15 - 1  -8.6400000864e15 - 1
              expect(Date.parse('+033658-09-27T01:46:40.000Z')).toBe(1e15); //         1e15          NaN           1e15          1e15          9999999136e5
              expect(Date.parse('-000001-01-01T00:00:00Z')).toBe(-621987552e5); //    -621987552e5   NaN          -621987552e5  -621987552e5  -621987552e5
              expect(Date.parse('+002009-12-15T00:00:00Z')).toBe(12608352e5); //       12608352e5    NaN           12608352e5    12608352e5    12608352e5
          });
  
          it('works with timezone offsets', function () {
              //  Chrome 19   Opera 12     Firefox 11   IE 9             Safari 5.1.1
              expect(Date.parse('2012-01-29T12:00:00.000+01:00')).toBe(132783480e4); //  132783480e4 132783480e4  132783480e4  132783480e4      132783480e4
              expect(Date.parse('2012-01-29T12:00:00.000-00:00')).toBe(132783840e4); //  132783840e4 132783840e4  132783840e4  132783840e4      132783840e4
              expect(Date.parse('2012-01-29T12:00:00.000+00:00')).toBe(132783840e4); //  132783840e4 132783840e4  132783840e4  132783840e4      132783840e4
              expect(Date.parse('2012-01-29T12:00:00.000+23:59')).toBe(132775206e4); //  132775206e4 132775206e4  132775206e4  132775206e4      132775206e4
              expect(Date.parse('2012-01-29T12:00:00.000-23:59')).toBe(132792474e4); //  132792474e4 132792474e4  132792474e4  132792474e4      132792474e4
              expect(Date.parse('2012-01-29T12:00:00.000+24:00')).toBeFalsy(); //        NaN         1327752e6    NaN          1327752000000    1327752000000
              expect(Date.parse('2012-01-29T12:00:00.000+24:01')).toBeFalsy(); //        NaN         NaN          NaN          1327751940000    1327751940000
              expect(Date.parse('2012-01-29T12:00:00.000+24:59')).toBeFalsy(); //        NaN         NaN          NaN          1327748460000    1327748460000
              expect(Date.parse('2012-01-29T12:00:00.000+25:00')).toBeFalsy(); //        NaN         NaN          NaN          NaN              NaN
              expect(Date.parse('2012-01-29T12:00:00.000+00:60')).toBeFalsy(); //        NaN         NaN          NaN          NaN              NaN
              expect(Date.parse('-271821-04-20T00:00:00.000+00:01')).toBeFalsy(); //     NaN         NaN          NaN         -864000000006e4 -864000008646e4
              expect(Date.parse('-271821-04-20T00:01:00.000+00:01')).toBe(-8.64e15); // -8.64e15     NaN         -8.64e15     -8.64e15        -864000008640e4
  
              // When time zone is missed, local offset should be used (ES 5.1 bug)
              // see https://bugs.ecmascript.org/show_bug.cgi?id=112
              var tzOffset = Number(new Date(1970, 0));
              // same as (new Date().getTimezoneOffset() * 60000)
              expect(Date.parse('1970-01-01T00:00:00')).toBe(tzOffset); //              tzOffset    0            0            0               NaN
          });
  
          it('should be able to coerce to a number', function () {
              var actual = Number(new Date(1970, 0));
              var expected = parseInt(actual, 10);
              expect(actual).toBeDefined();
              expect(actual).toBe(expected);
              expect(isNaN(actual)).toBeFalsy();
          });
  
      });
  
      describe('#toString()', function () {
          var actual;
  
          beforeEach(function () {
              actual = (new Date(1970, 0)).toString();
          });
  
          it('should show correct date info for ' + actual, function () {
              expect(actual).toMatch(/1970/);
              expect(actual).toMatch(/jan/i);
              expect(actual).toMatch(/thu/i);
              expect(actual).toMatch(/00:00:00/);
          });
      });
  
      describe('#valueOf()', function () {
          // Note that new Date(1970, 0).valueOf() is 0 in UTC timezone.
          // Check check that it's a number (and an int), not that it's "truthy".
          var actual;
  
          beforeEach(function () {
              actual = (new Date(1970, 0)).valueOf();
          });
          it('should give a numeric value', function () {
              expect(typeof actual).toBe('number');
          });
          it('should not be NaN', function () {
              expect(isNaN(actual)).toBe(false);
          });
          it('should give an int value', function () {
              expect(actual).toBe(Math.floor(actual));
          });
      });
  
      describe('#getUTCDate()', function () {
          it('should return the right value for negative dates', function () {
              // Opera 10.6/11.61/Opera 12 bug
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date, index) {
                      expect(date.getUTCDate()).toBe(item.days[index], date);
                  });
              });
          });
      });
  
      describe('#getUTCDay()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date, index) {
                      expect(date.getUTCDay()).toBe(item.getUTCDay[index]);
                  });
              });
          });
      });
  
      describe('#getUTCFullYear()', function () {
          it('should return the right value for negative dates', function () {
              // Opera 10.6/11.61/Opera 12 bug
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getUTCFullYear()).toBe(-109252);
                  });
              });
          });
      });
  
      describe('#getUTCMonth()', function () {
          it('should return the right value for negative dates', function () {
              // Opera 10.6/11.61/Opera 12 bug
              negativeDate.forEach(function (item, index) {
                  item.dates.forEach(function (date) {
                      expect(date.getUTCMonth()).toBe(index);
                  });
              });
          });
  
          it('should return correct values', function () {
              expect(new Date(8.64e15).getUTCMonth()).toBe(8);
              expect(new Date(0).getUTCMonth()).toBe(0);
          });
      });
  
      describe('#getUTCHours()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getUTCHours()).toBe(11);
                  });
              });
          });
      });
  
      describe('#getUTCMinutes()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getUTCMinutes()).toBe(59);
                  });
              });
          });
      });
  
      describe('#getUTCSeconds()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getUTCSeconds()).toBe(59);
                  });
              });
          });
      });
  
      describe('#getUTCMilliseconds()', function () {
          it('should return the right value for negative dates', function () {
              // Opera 10.6/11.61/Opera 12 bug
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getUTCMilliseconds()).toBe(708);
                  });
              });
          });
      });
  
      describe('#getDate()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date, index) {
                      expect(date.getDate()).toBe(item.days[index]);
                  });
              });
          });
      });
  
      describe('#getDay()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date, index) {
                      expect(date.getDay()).toBe(item.getDay[index]);
                  });
              });
          });
      });
  
      describe('#getFullYear()', function () {
          it('should return the right value for negative dates', function () {
              // Opera 10.6/11.61/Opera 12 bug
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getFullYear()).toBe(-109252);
                  });
              });
          });
      });
  
      describe('#getMonth()', function () {
          it('should return the right value for negative dates', function () {
              // Opera 10.6/11.61/Opera 12 bug
              negativeDate.forEach(function (item, index) {
                  item.dates.forEach(function (date) {
                      expect(date.getMonth()).toBe(index);
                  });
              });
          });
      });
  
      describe('#getHours()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getHours() + Math.floor(date.getTimezoneOffset() / 60)).toBe(11);
                  });
              });
          });
      });
  
      describe('#getMinutes()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      var off = date.getTimezoneOffset();
                      var offHours = Math.floor(off / 60);
                      var offMins = off - offHours * 60;
                      expect(date.getMinutes() + offMins).toBe(59);
                  });
              });
          });
      });
  
      describe('#getSeconds()', function () {
          it('should return the right value for negative dates', function () {
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getSeconds()).toBe(59);
                  });
              });
          });
      });
  
      describe('#getMilliseconds()', function () {
          it('should return the right value for negative dates', function () {
              // Opera 10.6/11.61/Opera 12 bug
              negativeDate.forEach(function (item) {
                  item.dates.forEach(function (date) {
                      expect(date.getMilliseconds()).toBe(708);
                  });
              });
          });
      });
  
      describe('#toISOString()', function () {
          // TODO: write the rest of the test.
  
          it('should support extended years', function () {
              expect(new Date(-62198755200000).toISOString().indexOf('-000001-01-01')).toBe(0);
              expect(new Date(8.64e15).toISOString().indexOf('+275760-09-13')).toBe(0);
          });
  
          it('should return correct dates', function () {
              expect(new Date(-1).toISOString()).toBe('1969-12-31T23:59:59.999Z'); // Safari 5.1.5 "1969-12-31T23:59:59.-01Z"
              negativeDate.forEach(function (item, index) {
                  var m = index + 1;
                  item.dates.forEach(function (date, idx) {
                      var d = item.days[idx];
                      expect(date.toISOString()).toBe('-109252-' + (m < 10 ? '0' + m : m) + '-' + (d < 10 ? '0' + d : d) + 'T11:59:59.708Z'); // Opera 11.61/Opera 12 bug with Date#getUTCMonth
                  });
              });
          });
  
      });
  
      describe('#toUTCString()', function () {
          it('should return correct dates', function () {
              expect(new Date(-1509842289600292).toUTCString()).toBe('Mon, 01 Jan -45875 11:59:59 GMT');
          });
      });
  
      describe('#toDateString()', function () {
          it('should return correct dates', function () {
              expect(new Date(-1509842289600292).toDateString()).toBe('Mon Jan 01 -45875');
          });
      });
  
      describe('#toString()', function () {
          it('should return correct dates', function () {
              var actual = new Date(1449662400000).toString();
              var re = /^Wed Dec 09 2015 \d\d:\d\d:\d\d GMT[-\+]\d\d\d\d(?: |$)/;
              expect(re.test(actual)).toBe(true, actual);
          });
      });
  
      describe('#toJSON()', function () {
  
          // Opera 11.6x/12 bug
          it('should call toISOString', function () {
              var date = new Date(0);
              date.toISOString = function () {
                  return 1;
              };
              expect(date.toJSON()).toBe(1);
          });
  
          it('should return null for not finite dates', function () {
              var date = new Date(NaN),
                  json;
              try {
                  json = date.toJSON();
              } catch (e) {
                  /* invalid json */
                  expect(e).not.toEqual(jasmine.any(Error));
              }
              expect(json).toBe(null);
          });
  
          it('should return the isoString when stringified', function () {
              var date = new Date();
              expect(JSON.stringify(date.toISOString())).toBe(JSON.stringify(date));
          });
      });
  
  });
  