Variable with $state - Jasmine Test - angularjs

Question

First, I never seen Angular and Jasmine until several months ago. So I spend two or three months studying this in the practices of a company, and finally they've sent me to try test a controller/service in Visual Studio Code.
I have this variable in the controller:
vm.option = $state.param.option;
And in the spec.js I create a it with this:
it('"option" should be defined', function () {
expect(ctrl.option).toBeDefined();
});
Previously, I inject in beforeEach a $controller, $rootScope, _$log_, $injector and the service. I need something special for test this variable? I tried inject _$state_ but the message Expected undefined to be defined appears too.
I appreciate all help, and sorry for my bad english.
Edit:
The spec.js :
'use strict';
describe('app/specs/spec.js', function () {
var scope, $log, service, ctrl, state/*, testedStateExample*/;
beforeAll(function () {} );
beforeEach(angular.mock.module('App.moduleExample'));
beforeEach(function () {
module(function ($provide){
$provide.constnt('APP_CONFIG', {});
});
});
beforeEach(angular.mock.inject(function ($controller, $state, $rootScope, _$log_, _service_){
service = _service_;
scope = $rootScope.$new();
$log = _$log_;
$state = $state;
state = { params: { option: 'E' }}
ctrl = $controller('controllerExample', {
$scope: scope,
service: service,
$log: $log
});
//testedStateExample = new ctrl(state);
});
it('"option" should be defined', function () {
expect(state.params).toBeDefined();
});
});

Answer 1

There is typo in your controller: $state doesn't have param property but params.
Besides, you have to also define params.option on injected $state object in your tests because in injected $state it's rather not set so your controller can't read it from $state - but how to do this depends on your code details. state.params are set according to URL and route config but when you test standalone controller there is no URL nor route config and as a result $state.params is empty.
The best way to solve your problem is to mock injected $state:
Lets say that you have following controller:
function MyController($state) {
this.option = $state.params.option
...
}
In your test spec you can mock $state service and pass this mock to your controller as argument:
var mockState = {
params: {
option: 'TEST'
}
}
var testedControllerInstance = new MyController(mockState)
}
...
expect(testedControllerInstance.option).toBe('TEST');
Answer update according to updated question:
You've forgotten to inject state into your controller:
beforeEach(angular.mock.inject(function ($controller, $state, rootScope, _$log_, _service_){
service = _service_;
scope = $rootScope.$new();
$log = _$log_;
var state = { params: { option: 'E' }}
ctrl = $controller('controllerExample', {
$scope: scope,
service: service,
$log: $log,
$state: state
});
});
...
})
;