node.js - Should js Cannot read property 'should' of null -


i try use testing tool mocha in node. consider following test scenario

var requirejs = require('requirejs');  requirejs.config({     //pass top-level main.js/index.js require     //function requirejs node modules     //are loaded relative top-level js file.     noderequire: require });   describe('testing controller', function () {      it('should pass', function (done) {             (4).should.equal(4);             done();     });      it('should avoid name king', function (done) {         requirejs(['../server/libs/validate_name'], function (validatename) {             var err_test, accountexists_test, notallow_test, available_test;             validatename('anu', function (err, accountexists, notallow, available) {                 accountexists.should.not.be.true;                 done();             });          });     });  });

as testing result have got:

$ make test ./node_modules/.bin/mocha \                 --reporter list    . testing controller should pass: 0ms   1) testing controller should avoid name anu    1 passing (560 ms)   1 failing    1) testing controller should avoid name anu:      uncaught typeerror: cannot read property 'should' of null       @ d:\townspeech\test\test.spec.js:23:30       @ d:\townspeech\server\libs\validate_name.js:31:20       @ d:\townspeech\test\test.spec.js:22:13       @ object.context.execcb (d:\townspeech\node_modules\requirejs\bin\r.js:1869:33)       @ object.module.check (d:\townspeech\node_modules\requirejs\bin\r.js:1105:51)       @ object.module.enable (d:\townspeech\node_modules\requirejs\bin\r.js:1376:22)       @ object.module.init (d:\townspeech\node_modules\requirejs\bin\r.js:1013:26)       @ null._ontimeout (d:\townspeech\node_modules\requirejs\bin\r.js:1646:36)       @ timer.listontimeout [as ontimeout] (timers.js:110:15)    make: *** [test] error 1

the first pass without complication second, seems like, not attach module shouldjs. why?

that's known problem should library: extends object, of course works when have concrete object. null, definition, means don't have object, can not call methods on or access of properties.

hence, should not available in case.

basically, have 2 options of how deal this:

  1. you exchange actual , expected. way, long not expect null, have object in beginning , hence can access should property. but, not nice, changes semantics, , not work in cases.
  2. you exchange should library assertion library not have problem.

personally, i'd go option 2, , highly subjective personal favorite node-assertthat (which has been written me, hence it's favorite).

anyway, there lots of other options, such expect. feel free use of these assertion libraries best suits style of writing tests.


Comments

Post a Comment

Popular posts from this blog

image - ClassNotFoundException when add a prebuilt apk into system.img in android -

i'm in trouble add prebuilt apk system.img based taiwan mtk android phone platform, when push apk onto device,after reboot phone,the apk can installed succecessfully,but if add apk alps/out/target/product/$prj/system/app or vendor/mediatek/$prj/artifacts/out/target/product/$prj/system/app ,and produce system.img,the apk can't installed normally,the logcat say: a.lang.runtimeexception: unable instantiate activity componentinfo{com.sec.android.widgetapp.ap.hero.accuweather.widget/com.sec.android.widgetapp.ap.hero.accuweather.widget.weatherclock}: java.lang.classnotfoundexception: com.sec.android.widgetapp.ap.hero.accuweather.widget.weatherclock. can tell me what's problem ? when package manager installs apps part of system partition different installing apps on data partition. looks app using libraries somewhere else. when install on data lib directory created in apps data directory , symlinked /data/app-lib/. when apps installed on system it's expecte...
Read more

I need to import mysql 5.1 to 5.5? -

i have mysql 5.1 database , need import localhost running 5.5. how import 5.5 or downgrade mysql? install phpmyadmin 5.1 os: http://www.wikihow.com/install-phpmyadmin-on-your-windows-pc or https://www.digitalocean.com/community/articles/how-to-install-and-secure-phpmyadmin-on-ubuntu-12-04 then login, click on database, hit export, , export in sql format (quick fine). import .sql file 5.5 server (after installing phpmyadmin) logging in clicking database , hit import. hope helps!
Read more

Java, Hibernate, MySQL - store UTC date-time -

i saw here on few related questions (like this one , of course, this one )... essentially, want store date-time utc, , let application user choose time zone wants display date-time in. since seems date-time fields affected underlying jdbc driver, wonder if acceptable way go storing utc date-time: set both mysql , application server machine utc time zone (no need separate) both mysql , jvm should pick underlying system time settings (if not instructed otherwise) use datetime table columns on mysql side use java.util.date corresponding mapping on hibernate side (i guess java.sql.timestamp used too) let application worry interpreting date-time fields - i.e. let user choose preferred time zone is ok? edit clarify - here meant refer timestamps created strictly on server (e.g.date-time of record creation). application server instantiates date objects (new date() equals current date-time on server, , time zone agnostic). if client user wants supply date searching/filte...
Read more