Skip to main content

React native testing library how to test async function?

Im trying to test when a user clicks a button and see if the function assign to that button is called. Im having problems because the function is an async function. Is there something wrong with the way Im testing it?

Function I want to test

 const handlerFunction = useCallback(async () => {
    await Storage.deleteKyes()l
    A.reset();
    navigate("Screen");
  }, [navigate]);

return (
        <Button
          testID="btnChangeUser1"
          data-testid="btnChangeUser1"
          onPress={handlerFunction}
          title={ChangeUser}
          titleStyle={[t.fontSansSemiBold]}
        />
)

Testing method

describe("method should be called", () => {
  it("Should activate when user press  button ", async () => {
    const handlerFunction = jest.fn();
    const { getByText } = render(<ReactComponent />);
    const element = getByText("ChangeUser");
    fireEvent.press(element);
    await waitFor(async () => {
      await expect(handlerFunction).toHaveBeenCalled();
    });
  });
});

Error shown

expect(jest.fn()).toHaveBeenCalled()
   Expected number of calls: >= 1
   Received number of calls:    0

I know its an error with the async method, because if I remove the async and the await method everyting works

I tried changing the async calls made but nothing seems to work

Via Active questions tagged javascript - Stack Overflow https://ift.tt/v3fiK9q

Comments

Popular posts from this blog

Where and how is this Laravel kernel constructor called? [closed]

Where and how is this Laravel kernel constructor called? public fucntion __construct(Application $app, $Router $roouter) { } I have read the documentation and some online tutorial but I can find any clear explanation. I am learning Laravel and I am wondering where does this kernel constructor receives its arguments from. "POSTMOTERM" CLARIFICATION: Here is more clarity.I have checked the boostrap/app.php and it is only used for boostrapping the interfaces into the container class. What is not clear to me is where and how the Kernel class is instatiated and the arguments passed to the object calling the constructor.Something similar to; obj = new kernel(arg1,arg2) or, is the framework using some magic functions somewhere? Special gratitude to those who burn their eyeballs and brain cells on this trivia before it goes into a full blown menopause alias "MARKED AS DUPLICATE". To some of the itchy-finger keyboard warriors, a.k.a The mods,because I believe in th...

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype