Running unit test : Karma + Jasmine gives undefined function `controller` error

I'm trying to implement the unit testing in existing angular project. For that I've added Grunt-Karma

karma:
      unit:
          options:
              frameworks: ['jasmine'],
              singleRun: true,
              browsers: ['PhantomJS'],
              files: [bower js files + project dev/test js files]

Controller is,

angular.module('app.lol.ctrls', []).controller('LOLCtrl', [
    '$scope', '$filter', 'Resource', '$log', function($scope, $filter, Resource, $log) {//some logic}

And test spec is

describe('Controller: LOLCtrl', function () {
    beforeEach(module('app'));

    var OrderCtrl;
    var scope;
    var filter;
    var log;
    var resource=someResourceWithSomeDataFunc;

    beforeEach(inject(function ($controller, $rootScope, $filter, $log) {
        scope = $rootScope.$new();
        OrderCtrl = $controller('LOLCtrl', {
            $scope: scope,
            $filter: filter,
            Resource: resource,
            $log: log
        });
    }));

    it('should have lolVar to be undefined', function () {
        expect(scope.lolVar).toBeUndefined();
    });
});

When I run the test, I'm getting error

PhantomJS 1.9.8 (Linux 0.0.0) Controller: LOLCtrl should have lolVar to be undefined FAILED
    Error: [ng:areq] Argument 'LOLCtrl' is not a function, got undefined
    http://ift.tt/1Tks4Ih
    undefined
        at assertArg ....

I tried the solutions like using angular.mock.module instead of module in beforeEach. Also I've double checked whether I'm including the controller file. Also the app.lol.ctrls is injected in app itself. I tried beforeEach(module(app.lol.ctrls)), but that too gives same error. Help would be greatly appreciated.