Testing element directive - can't access isolated scope methods during tests - angularjs

Question

I have the following directive.
directivesModule.directive('wikis', function() {
var urlRegex = new RegExp('^(https?)://.+$');
return {
restrict: 'E',
templateUrl: 'templates/wiki-list.html',
scope: {
wikis: '='
},
link: function(scope, element, attrs) {
scope.newWikiURL = '';
scope.$watch('wikis', function() {
if (scope.wikis == undefined || scope.wikis.length === 0) {
scope.class = 'hide';
} else {
scope.class = 'show';
}
}, false);
scope.addWiki = function() {
if (scope.wikis == undefined) {
scope.wikis = [];
}
var nw = scope.newWikiURL;
if (nw != undefined && nw.trim() != '' && urlRegex.exec(nw)) {
scope.wikis.push(nw);
scope.newWikiURL = '';
}
}
}
};
});
When I test it:
describe('Wikis Directive Test Suite', function() {
var scope, elem, directive, linkFn, html;
beforeEach(function() {
html = '<wikis wikis=''></wikis>';
inject(function($compile, $rootScope) {
scope = $rootScope.$new();
scope.wikis = [];
elem = angular.element(html);
$compile(elem)(scope);
scope.$digest();
});
});
it('add Wiki should add a valid wiki URL to artist', function() {
var url = 'http://www.foo.com';
scope.newWikiURL = url;
scope.addWiki();
expect(scope.wikis.length).toBe(1);
expect(scope.wikis[0]).toBe(url);
expect(scope.newWikiURL).toBe('');
});
});
I get an error saying that Object doesn't have an addWiki method. I tried to debug it, and the link function is not called during the test. I suspect that's why the addWiki method is not part of the scope. Anybody knows why I'm getting this error?
By the way, Is it a normal practice to add some logic into the link function of a directive as it would be a Controller itself? Because looking at the code I know that it's why in reality I'm doing.

Answer 1

As per angular 1.2.0 docs, the way to get the isolate scope is through the method isolateScope
scope() - retrieves the scope of the current element or its parent.
isolateScope() - retrieves an isolate scope if one is attached directly to the current element. This getter should be used only on elements that contain a directive which starts a new isolate scope. Calling scope() on this element always returns the original non-isolate scope.
Angular doc - section jQuery/jqLite Extras
BREAKING CHANGE: jqLite#scope()

Answer 2

You need to load the module containing your directive, otherwise angular doesn't know what <wikis> is
Your directive creates an isolate scope, so once it has been compiled you need to get the new scope using elem.isolateScope()
So with those changes:
describe('Wikis Directive Test Suite', function() {
var $scope, scope, elem, directive, linkFn, html;
beforeEach(module('app'));
beforeEach(function() {
html = '<wikis></wikis>';
inject(function($compile, $rootScope, $templateCache) {
$templateCache.put('templates/wiki-list.html', '<div>wiki template</div>');
$scope = $rootScope.$new();
$scope.wikis = [];
elem = angular.element(html);
$compile(elem)($scope);
scope = elem.isolateScope();
scope.$apply();
});
});
it('add Wiki should add a valid wiki URL to artist', function() {
var url = 'http://www.foo.com';
scope.newWikiURL = url;
scope.addWiki();
expect(scope.wikis.length).toBe(1);
expect(scope.wikis[0]).toBe(url);
expect(scope.newWikiURL).toBe('');
});
});
http://jsfiddle.net/QGmCF/1/