Using async await on .then function with parameters-CodePudding

I'm doing some functional testing with mocha. I stored my functions name, parameters and sucess message in local JSON file. I am checking my database response with local JSON response. I'm using .then and .catch everywhere. I am looking to clean up a code with async await. How I can use async await here?

it('Check Authentication', (done) => {
    readFileData('checkAuth').then(({ params, message}) => {
      login.checkAuth({ ...params })
        .then((result) => {
          assert(result.message === message);
          done();
        })
        .catch((err) => done(err));
    });
});

CodePudding user response：

Something like this. Haven't tested it tho. Basically instead of .then() you just await the call. Note that there is async before (done) callback. .catch() can be caught with try/catch block.

it('Check Authentication', async (done) => {
       let response = await readFileData('checkAuth');
       try {
         let message = await login.checkAuth({ ...response.params }); // or w/e the response is
         // assert the message
       } (catch e) {
          // do something with the error
       }
    });

CodePudding user response：

Changed callback function to async to use `await
Wrapped all await calls in try-catch block to handle errors
Used const for params, message and result variables but if you are going to reassign values later in the code you can use let instead.
done() will be async call. Add await in front of that if you need that too to be sync call

it('Check Authentication', async (done) => {
    try {
        const { params, message } = await readFileData('checkAuth');
        const result = await login.checkAuth({ ...params });
        assert(result.message === message);
        done();
    } catch (err) {
        done(err);
    }
});