This test case tests the Date constructor. In particular, it tests many cases of creating a Date from another Date and creating a Date from an object that has both valueOf and toString functions. On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE". PASS isNaN(new Date("")) is true PASS new Date(1995).getTime() is 1995 PASS new Date(object).getTime() is 1995 PASS new Date(new Date(1995)).getTime() is 1995 PASS new Date(new Date(1995).toString()).getTime() is 1000 PASS new Date(1995, 1).getTime() - timeZoneOffset is 791596800000 PASS new Date(1995, 1, 1).getTime() - timeZoneOffset is 791596800000 PASS new Date(1995, 1, 1, 1).getTime() - timeZoneOffset is 791600400000 PASS new Date(1995, 1, 1, 1, 1).getTime() - timeZoneOffset is 791600460000 PASS new Date(1995, 1, 1, 1, 1, 1).getTime() - timeZoneOffset is 791600461000 PASS new Date(1995, 1, 1, 1, 1, 1, 1).getTime() - timeZoneOffset is 791600461001 PASS new Date(1995, 1, 1, 1, 1, 1, 1, 1).getTime() - timeZoneOffset is 791600461001 PASS new Date(1995, 1, 1, 1, 1, 1, 1, 1, 1).getTime() - timeZoneOffset is 791600461001 PASS new Date(1995, 1, 1, 1, 1, 1, 1, 1, 1).getTime() - timeZoneOffset is 791600461001 PASS new Date(new Date(1995, 1)).getTime() - timeZoneOffset is 791596800000 PASS new Date(new Date(1995, 1, 1)).getTime() - timeZoneOffset is 791596800000 PASS new Date(new Date(1995, 1, 1, 1)).getTime() - timeZoneOffset is 791600400000 PASS new Date(new Date(1995, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset is 791600461000 PASS new Date(new Date(1995, 1, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset is 791600461001 PASS new Date(new Date(1995, 1, 1, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset is 791600461001 PASS new Date(new Date(1995, 1, 1, 1, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset is 791600461001 PASS Number(new Date(new Date(Infinity, 1, 1, 1, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset) is Number.NaN PASS Number(new Date(new Date(1, Infinity, 1, 1, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset) is Number.NaN PASS Number(new Date(new Date(1, 1, Infinity, 1, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset) is Number.NaN PASS Number(new Date(new Date(1, 1, 1, Infinity, 1, 1, 1, 1, 1)).getTime() - timeZoneOffset) is Number.NaN PASS Number(new Date(new Date(1, 1, 1, 1, Infinity, 1, 1, 1, 1)).getTime() - timeZoneOffset) is Number.NaN PASS Number(new Date(new Date(1, 1, 1, 1, 1, Infinity, 1, 1, 1)).getTime() - timeZoneOffset) is Number.NaN PASS Number(new Date(new Date(1, 1, 1, 1, 1, 1, Infinity, 1, 1)).getTime() - timeZoneOffset) is Number.NaN PASS Number(new Date(new Date(1, 1, 1, 1, 1, 1, 1, 1, Infinity)).getTime() - timeZoneOffset) is -2174770738999 PASS new Date(6501480442020679337816440, 81696082856817131586190070, 1, 1, 1, 1, 1).getTime() is Number.NaN PASS new Date(Date.parse('28 Feb 1000 GMT')).toGMTString() is "Fri, 28 Feb 1000 00:00:00 GMT" PASS new Date(Date.parse('1 Dec 988 GMT')).toGMTString() is "Mon, 01 Dec 0988 00:00:00 GMT" PASS new Date(Date.parse('1 Mar 1000 GMT')).toGMTString() is "Sat, 01 Mar 1000 00:00:00 GMT" PASS testStr is "1234567" PASS testStr is "1234567" PASS leapTestResult is true PASS successfullyParsed is true TEST COMPLETE