how to correctly import an asynchronous module.exports function in javascript-CodePudding

I have written an asynchronous function in a file called index.js as follows:

module.exports.func = async (obj) => {
    return {
      statusCode: 200,
      body: JSON.stringify({
        message: 'Success!',
        input: obj,
      }),
    };
};

However, when I try to write a test file called index.test.js, with the following code:

const exportedModule = require('./index');

test('Successfully execute func when empty object passed', () => {
  const obj = {};
  const expectedReturn = {
    statusCode: 200,
    body: JSON.stringify({
      message: 'Success!',
      input: obj,
    }),
  };
  const actualReturn = await exportedModule.func(obj);
  console.log(actualReturn);
  expect(actualReturn).toBe(expectedReturn);
});

, I get an error saying that exportedModule.func is not asynchronous, even through it clearly is. I cannot use promises (.then and .catch) to run the tests, as the test file will be deemed finished before the code in the .then/.catch is executed. Is there a way I'm supposed to be properly importing func such that I can use await? Ideally I would like this to be done within the test file itself without changing index.js.

CodePudding user response：

I get an error saying that exportedModule.func is not asynchronous

I think you're misreading the error. It's saying that the function in your test is not async. You can only use await in an async function. To fix it, add async to the function.

//                                                 added:  VVVVV
test('Successfully execute func when empty object passed', async () => {