bier hier bier hier - 1 year ago 211
React JSX Question

How to solve issue in jest unit test?

I have a unit test for a ReactJs/Typescript project that has a reference to a module called nock.js, and using jest:

import nock from 'nock'
...

afterEach(() => {
nock.cleanAll();
})


When I run the test I get an error in the .cleanAll statement:

TypeError: nock_1.default is not a function


However when I change the import statement to :

var nock = require('nock');


The issue is solved. How can I still use import instead of require ? Is this an issue with the jest configuration? This is the config:

"jest": {
"transform": {
"^.+\\.(ts|tsx)$": "<rootDir>/node_modules/ts-jest/preprocessor.js"
},
"moduleFileExtensions": [
"ts",
"tsx",
"js"
],
"testRegex": "/__tests__/.*\\.(ts|tsx|js)$"
},

Answer Source

If a module has a default export, you can use:

import nock from 'nock'

But if it doesn't have a default export, you'll need to use:

import * as nock from 'nock'
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