Jest hangs while importing useragent lib

[himalayagupta]

Hi,
i am writing tests in Jest.
testmodule.js
import useragent from 'useragent';
export sample()
{
return useragent.parse(value);
}

test.js
import sample from './testmodule.js'
describe('my reducer', () => {
it('should return the initial state', () => {
expect("hello").toEqual("hello")
})

when i run this test, "jest", the file hangs. If i comment the useragent lib import, then my test runs successfully.

Env:
React- 16.x
Node - 8.x

Can you please help me out here on what could be the issue here? Thanks

[VanceBeckett]

Same thing, using typescript with target "es6" or any other. Works fine in prod tho... Seems like this lib has some issue with jest/ts-jest. Don't have time to debug -_-

TypeError: Class constructor LRUCache cannot be invoked without 'new' - getting this on useragent import statement on all tests, that rely on useragent.

node 14.12

[VanceBeckett]

Okay, I've got it. This will fix the problem, will make a PR:

var LruCache = require('lru-cache')
var LRU = new LruCache(5000)

Just saw that this bug was already fixed in master (7 long months ago), but remains unpublished to npm...