[Bug]: Typescript compilation errors cause Jest to hang silently

[niekvandepas]

Version

28.0.1

Steps to reproduce

1. Close repo at https://github.com/NiekPas/jest-hangs.git
2. Run npm i
3. Run npm run test

Expected behavior

I expect to see a compilation error or other indication that the test could not be run.

Actual behavior

Jest hangs indefinitely.

Debug log

See gist.

Additional context

(Moved from jest: jestjs/jest#12832)

Could this be due to the use of ESM?

Environment

System:
    OS: macOS 12.2.1
    CPU: (8) x64 Intel(R) Core(TM) i7-4870HQ CPU @ 2.50GHz
  Binaries:
    Node: 14.19.1 - ~/.nvm/versions/node/v14.19.1/bin/node
    npm: 6.14.16 - ~/.nvm/versions/node/v14.19.1/bin/npm
  npmPackages:
    jest: ^28.0.3 => 28.0.3

[jstasiak]

I can confirm this problem when trying to build malformed code with Node.js 18.2.0, jest 28.1.0 and TypeScript 4.6.4.

ts-jest 27.1.4 is the last version that reports TS errors correctly, starting with ts-jest 28.0.0-next.0 things hang forever.

[tusharsnx]

I faced the same issue while testing my babel custom plugin. It never showed any error message. Still I found the problem was that ts-jest just hangs if I don't pass isolatedModules: true in the ts-jest config inside jest.config.ts

export default {
    preset: "ts-jest",
    extensionsToTreatAsEsm: [".ts"],
    globals: {
        "ts-jest": {
             tsconfig: "tsconfig.dev.json",
+            isolatedModules: true,
             useESM: true,
        },
    },
    moduleNameMapper: {
        "^(\\.{1,2}/.*)\\.js$": "$1",
    },
}

[tusharsnx]

After reading the debug log(using TS_JEST_LOG), I can confirm that the ts-jest is able to detect the error and log it and only hangs after that.

[ahnpnl]

Possibly related to the fact that we throw ts errors in ESM mode instead of Promise.reject

[danyrojj]

      isolatedModules: true,

you saved my day thanks!