javascript - Jasmine/PhantomJS ignoring __defineGetter__ method -


i'm working in tests using jasmine 2.0 , have test code:

describe('my feature test', function () {     describe('negative asserts', function () {         it('expect location.search not equal pre-defined value', function () {             var myqueryvalue = '?custom_query=true';              expect(myqueryvalue).not.toequal(window.location.search);         });     });      describe('positive asserts', function () {         beforeeach(function () {             window.location.__definegetter__('search', function () {                 return '?custom_query=true';             });         });          it('expect location.search equal pre-defined value', function () {             var myqueryvalue = '?custom_query=true';             console.log(window.location.search);             expect(myqueryvalue).toequal(window.location.search);         });     }); });

i'm using grunt task run code using karma , launching google chrome (karma-chrome-launcher) , phantomjs (karma-phantomjs-launcher) browsers.

in google chrome test pass perfectly

log: '?custom_query=true' chrome 43.0.2357 (mac os x 10.10.3): executed 99 of 99 success (2.889 secs / 2.761 secs)

but when test runs in phantomjs __definegetter__ method ignored:

log: '' phantomjs 1.9.8 (mac os x) feature test positive asserts expect location.search equal pre-defined value failed phantomjs 1.9.8 (mac os x): executed 99 of 99 (1 failed) (2.528 secs / 2.522 secs)

any ideas why happening?

edit: tried object.defineproperty , still not working.

the defineproperty approach fails in phantomjs following error:

attempting change access mechanism unconfigurable property

i not find place documented, error above makes me wonder if properties not modifiable in phantomjs.

same problem encountered here, suggested solution in case wrap non-overridable methods simple user-defined functions can overridden in tests:

// wrap search property testing purposes function getlocationsearch() {     return window.location.search; }

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