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Unable to stream events within a mocked DOM source in CycleJs test

By : KKR Ambir
Date : October 14 2020, 02:21 PM
This might help you I think I spotted the problem.
The thing is, with the mocked DOM driver, you need to create event for the exact same selector as the one used in DOM.select('...').events.
code :
const clicks = Time.diagram('---0---1----0---|').map(position => {
    // this will create a fake DOM event that contains the properties you are reading
    return {target: {dataset: {position: position }}}

const DOM = mockDOMSource({
    '.string': {
        click: clicks

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When target stream emit error events, can we somehow reuse the source stream?

By : Kendai Ren
Date : March 29 2020, 07:55 AM
wish helps you You do not need to introduce a stream in the middle just to read the first byte. For example:
code :
(function readChunk() {
  var chunk = res.read();
  if (!chunk)
    return res.once('readable', readChunk);

  var inflate;
  if ((chunk[0] & 0x0F) === 0x08)
    inflate = zlib.createInflate();
    inflate = zlib.createInflateRaw();

  // Put chunk back into stream

  // Prepare the decompression

  output = new Response(inflate, response_options);

Unable to Unit Test an Angular Controller with service mocked

By : user6186610
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I suspected that my previous test code did not work with my existing library versions. I'm using:
code :
"devDependencies": {
"bower": "^1.8.0",
"http-server": "^0.9.0",
"jasmine-core": "^2.4.1",
"karma": "^1.3.0",
"karma-chrome-launcher": "^2.0.0",
"karma-firefox-launcher": "^1.0.0",
"karma-jasmine": "^1.0.2",
"phantomjs": "^2.1.7",
"protractor": "^4.0.9"
    describe('controller register module unit tests implementation', function(){

    var $controller;
    var $scope;
    var userRestService;

    beforeEach(module('ghhweb.register.controller', function($provide){
        userRestService = jasmine.createSpyObj('userRestService'
            , ['checkExistingMail']);


        $provide.value('userRestService', userRestService);

    beforeEach(inject(function(_$controller_, $rootScope,_userRestService_){
        $scope = $rootScope.$new();
        userRestService = _userRestService_;
        $controller = _$controller_('RegisterController', {
            $scope: $scope,
            userRestService: userRestService

    it('should call userRestService', function(){

Unable to test a global value in a mocked function using mock_open()

By : Setare
Date : March 29 2020, 07:55 AM
With these it helps Citing the mock_open docs:
code :
def generate_cfg_thresh_map():
        with open ('/opt/config/pwr_thresh_cfg', 'r') as fh:
            for line in fh.readlines():
class ReportMonitor(unittest.TestCase):
    def test_generate_cfg_thresh_map(self):
        m = mock_open(read_data='ENTRY_THRESH_COUNT 200')
        m.return_value.__iter__ = lambda self: self
        m.return_value.__next__ = lambda self: next(iter(self.readline, ''))
        with patch('app.open', m):
            assert app.max_eval_count == 200
class ReportMonitor(unittest.TestCase):
    def test_generate_cfg_thresh_map(self):
        m = mock_open(read_data='ENTRY_THRESH_COUNT 200')
        m.return_value.__iter__ = lambda self: iter(self.readline, '')
        with patch('app.open', m):
            assert app.max_eval_count == 200

Unable to test react component with using some mocked functions

By : user3483599
Date : March 29 2020, 07:55 AM
This might help you Proceed is supposed to be called in the then block of the login function. I think the test is failing because the login promise has not been resolved by the time you check if proceed is called.
Try to make the test asynchronous and await the submit event like this:
code :
it ('logins in a user', async () => {
        const login = jest.fn(() => Promise.resolve({f: 2893}))
        const proceed = jest.fn(() => {
        const payload = {
            email: 'ewomaukah@yahoo.com',
            password: 'solomon1'
        const wrapper = mount(
        wrapper.find('input[type="email"]').simulate('change', {
            target: {
                value: payload.email
        wrapper.find('input[type="password"]').simulate('change', {
            target: {
                value: payload.password
        await wrapper.find('Form').simulate('submit')

Cyclejs and trigger events with values

By : meade
Date : March 29 2020, 07:55 AM
hope this fix your issue It seems like you want combineLatest, not merge. Both combineLatest and merge are "combination operators". They bring multiple Observables together and output one Observable. However, combineLatest is for "AND" combinations, while merge is for "OR" combinations.
You probably need "AND", because you want the value from first-number AND the value from second-number. That said, you want those values only when an add click happens. In that case, there is a variant of combineLatest called withLatestFrom. It allows you to sample the values from first-number AND second-number, but only when the add click happens.
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