I am new to the jasmine test case I tried to do jasmine test case for selection module after doing this style property is getting undefined
function Selection() { } Selection.prototype.expandFlightDetails = function() { document.getElementsByClassName("flight-details-container").style.display = 'none'; document.getElementById("expandedFlightDetails").style.display = 'block'; }; Selection.prototype.hideFlightDetails = function() { document.getElementById("expandedFlightDetails").style.display = 'none'; document.getElementsByClassName("flight-details-container").style.display = 'block'; }; My testcase is
describe("selection module", function() { var selection; beforeEach(function () { selection= new Selection(); }); afterEach(function () { }); it('expand the flight details part ' , function(){ selection.expandFlightDetails(); expect(document.body.getElementsByClassName('flight-details-container')[0].style.display).toEqual('none'); }); xit('hide the flight details part ', function(){ selection.hideFlightDetails(); expect(document.getElementById('expandedFlightDetails').style.display).toEqual('none'); }); }); After doing this I'm geting and removed code to beforEach
TypeError: Cannot read property 'style' of undefined
please correct me if I have done wrong
1 Answers
Answers 1
You have a few errors on this code.
First in Selection.prototype.expandFlightDetails make sure to get the first result of the array (you forgot the [0]):
document.getElementsByClassName("flight-details-container")[0] Same comment for Selection.prototype.hideFlightDetails
Then in your test suite you create a Selection instance named selection but then in both tests you are using a variable called flightselection which is declared nowhere. Shouldn't it be selection instead?
Finally your problem seems to be that you try to manipulate 'flight-details-container' in your test, although this element is created on the afterEach callback. afterEach means that this will be executed after each test, so it doesn't exist during the test.
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