Upgrading from v25.4.0 to v25.5.0 breaks vue imports

[Ky6uk]

🐛 Bug Report

I have tried to upgrade ts-jest from v25.4.0 to v25.5.0 today, but almost all tests for Vue components have been broken after that.

 FAIL  src/components/icons/__tests__/Icon.test.ts
  ● Test suite failed to run

    src/components/icons/__tests__/Icon.test.ts:2:24 - error TS2307: Cannot find module '../Icon.vue'.

    2 import RepeatIcon from '../Icon.vue';

Debug log:

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envinfo

System:
    OS: OS X Mojave

Npm packages:
    jest: 26.0.1
    ts-jest: 25.5.0
    typescript: 3.8.3

[Ky6uk]

It's probably related to one of the modules that ts-jest did update also (mkdirp). Downgrading back just for ts-jest 25.4.0 itself doesn't help.

[ahnpnl]

hi, does it happen to jest 25 ?

[Ky6uk]

@ahnpnl yes, it is. Just tried to install jest 25.5.4 and ts-jest 25.5.0.

[ahnpnl]

do you have a repo that I can debug ? That would be very helpful

[andyrichardson]

I've just started to have issues with typescript support in ts-jest also - I think it's related to a patch update.

Here's the error I'm getting after rebuilding my lockfile - circleci

And here's the lockfile diff before and after the error -
lockfile-diff.log

@ahnpnl if you need a reproduction, feel free to clone this repo

The following should demonstrate the issue.

git clone https://github.com/FormidableLabs/urql-devtools-exchange.git
cd urql-devtools-exchange

# This will work fine
yarn --frozenLockfile
yarn test

# This will fail
rm yarn.lock
yarn
yarn test

[ahnpnl]

hi @andyrichardson , the diagnostics threw in your CI was correct. Your IDE will suggest something like this

Because Global interface is NodeJs.Global which doesn't have property window.

[andyrichardson]

@ahnpnl that wouldn't explain why this was working prior to rebuilding the lockfile (check the build report for master). Declaration merging is being used on the project (try running tsc --noEmit) - your editor likely won't show any errors if you restart the TS server.

[ahnpnl]

do you use custom typing files for that declaration merging ?

[andyrichardson]

I'm not too sure what you mean by custom typing files - I'm just using declaration merging (this is the file)

If you think this is unrelated, I'm happy to create a new issue - I just think it's a bit of a coincidence that both of us have suddenly got our tests failing just by rebuilding the lockfile.

Edit: Looks like my particular issue was related to jest being updated on lockfile rebuild. Pinning jest doesn't prevent derivative dependencies (e.g. @jest/console, @jest/core) from updating to 25.5.0.

[ahnpnl]

ok, would you please check CHANGELOG for the migration :) referencing issue #1115 (comment)

[Ky6uk]

@ahnpnl I have tried to make new repo with this bug, but I can't make it work. Only my old repository is working where I have my old package-lock.json with thousands of packages.

[andrevmatos]

We also got issues related to this. It did not only affect our Vue frontend, but also our backend, which depend on global.d.ts declaration merging to extend some modules. This was on our dependency upgrade PR: raiden-network/light-client#1474
Debugging, we did notice that reverting ts-jest to 25.4.0 works for both jest 25 and 26, but ts-jest@25.5.0 fails for both jests.

[ahnpnl]

@andrevmatos have you tried migration steps in CHANGELOG.md for your custom declaration merging typing files ?

@Ky6uk indeed your repo throws error with vue file regardless 25.4.0 or 25.5.0. I never try with Vue before so this might need to look into. Another thing is you define ts-jest to use babel but your repo doesn't contain babel config.

[Ky6uk]

@ahnpnl I think babel config will need for further steps of compilation. The first step is just importing module with vue-jest, I guess.

UPD: Yes, adding a babel config doesn't change anything.

[andrevmatos]

Just tried. I had to specify tests/tsconfig.json on globals.ts-config.tsConfig, but hardcoding global.d.ts files there did work for backend. I think this is wrong, since TypeScript merge these files automatically, but it did workaround the issue.
The Vue errors though did not work with it. Even specifying tsconfig.json on ts-jest, ít did not honor the paths aliases declared on it and failed with tons of Cannot find module '@/..., maybe related to babel.

[ahnpnl]

@andrevmatos yes because 25.5.0 contains a boost in performance, which requires any custom typing files need to be defined in tsconfig so internal ts-jest can fetch those to TypeScript compiler. That is the tradeoff to boost performance so it's not a workaround anymore. It is similar with tsc command because tsc will scan your tsconfig to detect which files to take into account

Related to Vue, this will need to investigate more. At the moment ts-jest doesn't have tests for Vue so it's worth to check. At the moment, I'm collaborating with vue-jest team regarding to the usage of ts-jest in Vue. Detail is here vuejs/vue-jest#239 (comment)

Do you guys have a small repo for Vue with ts-jest which used to work before ? (not about declaration merging or custom typing)

[ahnpnl]

ok @Ky6uk I know how to fix your issue:

• Create a vue-shim.d.ts with this content

declare module "*.vue" {
  import Vue from 'vue'
  export default Vue
}

Check answer in SO here https://stackoverflow.com/questions/42002394/importing-vue-components-in-typescript-file

• Add this vue-shim.d.ts to your tsconfig
• Run the tests and you no longer have the error Cannot find module

[Ky6uk]

@ahnpnl I've updated the repo. Now it's with tsconfig and with shim also. But the error still exists. I've just forgotten to add those files. My working repo is private and has a lot of stuff, so I tried to make a minimal reproducible repository and can miss something.

[ahnpnl]

even your repo after adding vue-shim.d.ts it will still throw errors. However, the errors I see is missing dependencies. Do you see the same thing ?

[Ky6uk]

[ahnpnl]

your tsconfig doesn't use vue-shim.d.ts, you can see the migration step in CHANGELOG. You need to use files instead of include

[ahnpnl]

this is the tsconfig I use

{
  "compilerOptions": {
    "module": "commonjs",
    "target": "es5",
    "sourceMap": true
  },
  "files": [
    "vue-shim.d.ts"
  ],
  "exclude": [
    "node_modules"
  ]
}

[ahnpnl]

@andrevmatos probably your issue with Vue is related to that vue-shim.d.ts too.

[Ky6uk]

Yes, it seems to be fixed. But I got another error.

Is it now required to add all declaration files one by one, even from other modules, in ts-jest 25.5?

[samuelfullerthomas]

which requires any custom typing files need to be defined in tsconfig so internal ts-jest can fetch those to TypeScript compiler.

Isn't this a breaking change no a minor? This broke my tests in my next js project, for similar reasons as the above (declaration merging).

imports of static files like svgs failed:
TS2307: Cannot find module '../../static/images/icon-info.svg'.

as did extended next types, like accessing the process.browser property:
Property 'browser' does not exist on type 'Process'. const prevBrowserVal: any = process.browser

[Ky6uk]

Okay, I found declaration file with Writatble. It's also fixed.

[Ky6uk]

@ahnpnl It looks inconvenient to find every declaration and add it to the tsconfig.json. Is it any problem with previous behavior? Can it be enabled by adding a flag or option?

[ahnpnl]

@samuelfullerthomas the change has been mentioned in CHANGELOG.md as breaking change. ts-jest doesn't follow semantic versioning and in README has mentioned about that too.

@Ky6uk maybe the fix can be: revert the changes to use only files from tsconfig and inform users that if they want to have performance boost, they need to set include: [] in tsconfig

[Ky6uk]

Alright, it seems the problem has been fixed by adding all declarations to the files section in tsconfig.json.

[ahnpnl]

I will make an alpha version which includes the solution suggested above. I think that will reduce the need of defining each typing files in files.

[ahnpnl]

Note that even set include: [] by yourself with alpha version, you will run into the same issue as 25.5.0. So probably documentation should help

[andrevmatos]

Yes, adding shim plus a bunch of plugins and mixins declaration files to tsconfig::files did the trick, although again I think this is plan wrong. I could say I was more satisfied with ts-jest's performance before than I'm dissatisfied by this breaking change and needing to keep track of several declaration files otherwise automatically picked up by TypeScript, just for testing.
IMHO, ts-jest's seamless compatibility with typescript's and jest's behaviors would be a higher priority target than any performance improvement achievable by this breaking change, even though it was properly informed in changelog.

[ahnpnl]

Ye I think safer to revert that change and add documentation regarding performance boost.

[cvle]

We have more than 28 type files. It's not possible to use glob patterns right? This seems tedious to maintain.

[ahnpnl]

files cannot be used with glob-like pattern https://www.typescriptlang.org/docs/handbook/tsconfig-json.html . Workaround for now it is staying on 25.4.0 :) I will push out 25.5.1-alpha.0 for testing as soon as #1607 is reviewed.

[ahnpnl]

hi everyone, apologize for the inconvenience caused by the breaking change introduce in 25.5.0. I have published 25.5.1-alpha.0 under next tag. Would you please test and verify if it fixes the problem ?

You can try it by running npm install -D ts-jest@next or yarn add -D ts-jest@next

[Ky6uk]

Upgrading from 25.5.0 to 25.5.1-alpha.0 fixes the issue with Cannot find module.

[hbroer]

My custom types are found again. 25.5.1-alpha.0 works for me. Thanks for your work. :)

[ahnpnl]

I will leave alpha version for others to test for a while (1 or 2 days). If the fix works for all, 25.5.1 will be published shortly after closing this issue.

[mforman1]

Upgrading from 25.5.0 to 25.5.1-alpha.0 fixes for me as well the issue with Cannot find module.

[alexvetter]

Upgrading from 25.5.0 to 25.5.1-alpha.0 fixes our issue (failed to import *.svg, Cannot find module) without the need to change any config file.

[ahnpnl]

Close via #1606 There will be a slight delay for 25.5.1. Stay tune

[ahnpnl]

25.5.1 is out