Karma testing: TypeError: Attempted to assign to readonly property
readonly error is caused by scope.page(in my InformationController) being undefined and then the code is trying to assign a property to undefined.Hence the modified beforeEach block as below
beforeEach(inject(function ($controller, $rootScope) { scope = $rootScope.$new(); scope.page3 = {}; InformationController = $controller('InformationController', { $scope: scope }); }));This solved the issue.