Can't import mudder 1.1.1 with jest

[tiagocpeixoto]

When importing version 1.1.1 using Typescript, I got the following error:

Cannot read properties of undefined (reading 'mudder')
TypeError: Cannot read properties of undefined (reading 'mudder')

I tried to import using these statements, without success:

import * as mudder from "mudder"; // used until version 1.1.0
import mudder = require("mudder"); 
const mudder = require("mudder");

The error only occurs with version 1.1.1. The previous version was ok.

Env:
Node version 16
Typescript version 4.5.5
Webpack version 5.68
Jest version 27.4.7

Test code:

import * as mudder from "mudder";
// import mudder = require("mudder");
// const mudder = require("mudder");

describe("tests", function () {
  it("test generate string", function () {
    expect(mudder.base62.mudder(1)).toBeTruthy();
  });
});

[fasiha]

Thanks for the note! Hmm, it seems to work when I try the following very basic steps: first,

mkdir newtest
npm init -y
npm i mudder typescript @types/mudder
npx tsc --init

Then I create the following in index.ts:

import * as mudder from 'mudder';
console.log(mudder.base62.mudder(1))
console.log(mudder.base62.mudder(3))

before finally running:

npx tsc -p .
node index.js

I get the following:

$ mudderts node index.js
[ 'U' ]
[ 'F', 'U', 'k' ]

Let me know if the above works? Because, the above works if I install npm i --exact --save-exact mudder@1.1.0 to install 1.1.0. If the above is also failing for you, we might have to dig into what #18 changed in your workflow.

[tiagocpeixoto]

Ok, thanks. I will check my workflow.
Just a note: as a breaking change, shouldn't version 1.1.1 be 2.0.0?

[tiagocpeixoto]

After checking my workflow and using your example as a starting point, I found that the problem occurs when testing with Jest (don't know why yet).

npm i jest ts-jest @types/jest

add the file jest.config.js

const { defaults: tsjPreset } = require("ts-jest/presets");

module.exports = {
  transform: {
    ...tsjPreset.transform,
  },
};

and the file test index.test.ts

import * as mudder from "mudder";
// import mudder = require("mudder");
// const mudder = require("mudder");

describe("tests", function () {
  it("test generate string", function () {
    expect(mudder.base62.mudder(1)).toBeTruthy();
  });
});

and then type

npx jest

The result:

TypeError: Cannot read properties of undefined (reading 'mudder')

       5 | describe("tests", function () {
       6 |   it("test generate string", function () {
    >  7 |     expect(mudder.base62.mudder(1)).toBeTruthy();
         |                          ^
       8 |     // expect("test").toBeTruthy();
       9 |   });
      10 | });

[fasiha]

Hmm, when I follow your instructions, I get

➜  npx jest
 PASS  ./index.test.js
 PASS  ./index.test.ts (9.972 s)

Test Suites: 2 passed, 2 total
Tests:       2 passed, 2 total
Snapshots:   0 total
Time:        12.005 s
Ran all test suites.

Here's an orphan branch with the state of my directory right now: https://github.com/fasiha/mudderjs/tree/issue-19 Can you compare your state to mine and see where the diff is? Are we getting different versions of typescript/jest?

Just a note: as a breaking change, shouldn't version 1.1.1 be 2.0.0?

This is definitely the case but we all expected #18 to be a user-invisible change. If it turns out this is not an issue with your setup but is a broader problem, I'll definitely cut a 2.0 release.

Thanks for bearing with me while we figure this out!

[tiagocpeixoto]

The issue-19 brunch works, indeed.

BUT when changing the mudder version to 1.1.1 (in package.json), the aforementioned error occurs.

Could you check it with mudder version 1.1.1?

[tiagocpeixoto]

Any news about the tests?

[fasiha]

Thanks for the updated info and the poke @tiagocpeixoto! Sorry for the delay, I now see I was misled last week, and you're right, with the latest mudder, jest indeed fails.

@vitaliytv, sorry to bother you with this, I'm curious if you knew what might be causing this issue with jest? Before #18 (mudder 1.1.0) seems to work fine, but with #18 the following happens—first, the setup:

git clone git@github.com:fasiha/mudderjs.git issue-19
cd issue-19
git checkout issue-19
npm i
npx jest --clearCache
npx jest

This produces the following error:

    TypeError: Cannot read properties of undefined (reading 'mudder')

      5 | describe('tests', function() {
      6 |   it('test generate string', function() {
    > 7 |     expect(mudder.base62.mudder(1)).toBeTruthy();
        |                          ^
      8 |   });
      9 | });

I'm sure it's some weird Jest issue because I can run npx ts-node index.ts which imports mudder exactly the same way as index.test.ts and it works fine.

Potentially relevant links that I consulted that didn't help:

• https://stackoverflow.com/questions/69138834/jest-typeerror-cannot-read-property-bind-of-undefined
• https://stackoverflow.com/questions/50427196/jest-typeerror-cannot-read-property-of-undefined

[vitaliytv]

thank you
i reproduced this error with jest,
this is not related to typescript, because with javasript also fails:

import { jest } from '@jest/globals'
import * as mudder from 'mudder'

test('Empty options', () => {
  expect(mudder.base62.mudder(1)).toBeTruthy()
})

i recommend use something other for example test director:

import { deepEqual } from 'assert'
import TestDirector from 'test-director'
import * as mudder from 'mudder'

const tests = new TestDirector()

tests.add('test director', async () => {
  deepEqual(mudder.base62.mudder(1), ['U'])
})

tests.run()

npx coverage-node test/index.js

[tiagocpeixoto]

Hi there! Is it really not possible to use mudder 1.1.1 with Jest?

[vitaliytv]

Hi there! Is it really not possible to use mudder 1.1.1 with Jest?

no, use 1.1.0

[fasiha]

@tiagocpeixoto are you trying to avoid pinning to a patch version of mudder in your package.json? If so, what I can do is re-release 1.1.1 as 2.0 and release a new 1.1.2 that's equal to 1.1.0 (i.e., roll back 1.1.1 in v1). I do think that, since we broke "developer" backwards compatibility somehow, we should release a new major version 😅.

Will that work for you? Please accept my apologies for (1) not realizing the issue with Jest (I'm not a user), and (2) for taking so long to understand your issue! Let me know if this will work, I'll take care of it right away (~24 hours).

[tiagocpeixoto]

@tiagocpeixoto are you trying to avoid pinning to a patch version of mudder in your package.json? If so, what I can do is re-release 1.1.1 as 2.0 and release a new 1.1.2 that's equal to 1.1.0 (i.e., roll back 1.1.1 in v1). I do think that, since we broke "developer" backwards compatibility somehow, we should release a new major version 😅.

Will that work for you? Please accept my apologies for (1) not realizing the issue with Jest (I'm not a user), and (2) for taking so long to understand your issue! Let me know if this will work, I'll take care of it right away (~24 hours).

@fasiha, yes, it will work. Thank you in advance.

[fasiha]

@tiagocpeixoto thanks for your patience, v1.1.2 should be identical to v1.1.0 and should continue working with Jest. v2.0 meanwhile has @vitaliytv's esbuild improvements. Both just pushed.

I hope we can figure out how to get Jest to work but in the meantime, hopefully this workaround is ok.

[tiagocpeixoto]

Just a note: Jest v28 solves the problem and can be used with mudder v2.0.0.