From e4af522b88aac49c368ceb3dff0193f43bc5dc11 Mon Sep 17 00:00:00 2001 From: AJ ONeal Date: Wed, 12 Jun 2019 08:42:57 +0000 Subject: [PATCH] test conditions and notes --- test.js | 133 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 test.js diff --git a/test.js b/test.js new file mode 100644 index 0000000..e08b0ff --- /dev/null +++ b/test.js @@ -0,0 +1,133 @@ +var d = new Date("5/18/2019, 07:49:13"); +// Fri May 17 2019 17:49:13 GMT-0400 (Eastern Daylight Time) +// utc should be Fri, 17 May 2019 21:49:13 GMT" +// +console.log("d:" + d) +console.log("tzUTC:" + tzUTC(d, 'Australia/Sydney')) + +d = new Date("5/17/2019, 14:53:21"); +console.log("d:" + d) + +// Fri May 17 2019 17:53:21 GMT-0400 (Eastern Daylight Time) +// utc "Fri, 17 May 2019 21:53:21 GMT" + +console.log("tzUTC:" + tzUTC(d, 'America/Los_Angeles')) + + +////// +////// 9:01 twice +////// + +var d = new Date("3/10/2019, 01:59:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +// tzUTC:Sun, 10 Mar 2019 08:59:00 GMT + +var d = new Date("3/10/2019, 02:01:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +// tzUTC:Sun, 10 Mar 2019 09:01:00 GMT + +var d = new Date("3/10/2019, 02:59:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +// tzUTC:Sun, 10 Mar 2019 09:59:00 GMT + +var d = new Date("3/10/2019, 03:01:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +// tzUTC:Sun, 10 Mar 2019 09:01:00 GMT + +////// +////// 8:01 never +////// + +var d = new Date("11/03/2019, 01:59:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +// tzUTC:Sun, 03 Nov 2019 07:59:00 GMT + +var d = new Date("11/03/2019, 02:01:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +// tzUTC:Sun, 03 Nov 2019 09:01:00 GMT + +var d = new Date("11/03/2019, 02:59:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +// tzUTC:Sun, 03 Nov 2019 09:59:00 GMT + +var d = new Date("11/03/2019, 03:01:00"); +console.log("tzUTC:" + tzUTC(d, 'America/Denver')); +tzUTC:Sun, 03 Nov 2019 10:01:00 GMT + + +/* +Yes, that's a major use case. And one that can contact people according to their timezone. The daylight savings problem most likely won't affect us. But it could. +As a failsafe is there a way that you could detect daylight savings time and report it? Perhaps create 3 times and check that the difference on either side is exactly 1.5 hours? +*/ + +/* +But there's a second thing, more along the lines of a scheduler: + +Given a target date in local time, produce the same local time a week later. + +"I'm having lunch with John today at 12:30 pm. Schedule a lunch next week at 12:30pm." + +The naive approach that almost always works is to simply add (7 x 24 x 60 x 60 x 1000), but that won't work if the lunch happened on either of these days: + +var d = new Date("03/07/2019, 12:30:00"); // + (7 * 24 * 60 * 60 * 1000) + +var d = new Date("11/01/2019, 12:30:00"); // + (7 * 24 * 60 * 60 * 1000) + +In both instances my simple calendar would be off by an hour. +*/ + +/* +I think the solution will be: + +srcMs = toMs(srcLocalDate) +targetMs = srcMs + diffMs +targetLocalDate = toLocal(targetMs) +targetMs += toMsAsIfUtc(srcLocalDate) - (toMsAsIfUtc(targetLocalDate) - diffMs) +return toLocalDate(targetMs) +*/ + +(function (exports) { +'use strict'; + +exports.TEST = function (myfn) { + + var tests = [ + { name: "normal date" + , input: { d: '5/18/2019, 8:59:48 AM', tz: "America/Denver" } + , expected: 1558191588007 + } + ]; + + function next() { + var t = tests.shift(); + var result; + if (!t) { + return true; + } + try { + result = Promise.resolve(myfn(t.input)); + } catch(e) { + result = Promise.reject(e); + } + + result.then(function (result) { + if (result === t.expected) { + return true; + } + throw new Error(t.name + ": result did not match expected: " + JSON.stringify(result) + " vs " + JSON.stringify(t.expected)); + }); + } + + return next(); +}; +}('undefined' === typeof module ? window : module.exports)); + +runner.js: +(function (exports) { +'use strict'; + +var tzUtc = exports.tzUtc || require('./index.js').tzUtc; +var tester = exports.TEST || require('./test.js').TEST; +tester(tzUtc); + +}('undefined' === typeof module ? window : module.exports)); \ No newline at end of file