V4.0.0-beta.0: extends in tsconfig.json does not work as expected.

tsConfig.json

{
  "extends": "./.temp/tsconfig-base.json"
}

tsconfig-base.json

{
  "include": ["../src/**/*", "../types/**/*.d.ts", "./loader-types.d.ts", "./client-types.d.ts"],
  "exclude": ["../src/**/*.spec.ts", "../src/**/*.spec.js"],
  "compilerOptions": {
    "strict": true,
    "skipLibCheck": true,
    "module": "esnext",
    "target": "es6",
    "allowSyntheticDefaultImports": true,
    "moduleResolution": "node",
    "lib": ["dom", "es6", "dom.iterable", "scripthost"],
    "noEmitHelpers": true,
    "importHelpers": true,
    "inlineSources": true,
    "sourceMap": true,
    "experimentalDecorators": true,
    "emitDecoratorMetadata": true,
    "baseUrl": ".",
    "paths": {
      "~ngAppModule": ["./ng-app-module"]
    },
    "outDir": "../dist/",
    "rootDir": "../src"
  }
}

When I tried debugging this issue, it logs {"extends":"./.temp/tsconfig-base.json","compilerOptions":{}} at https://github.com/vuejs/vue-jest/blob/master/lib/compilers/typescript-compiler.js#L11

related to #118

[IlCallo]

From what I read, vue-jest v3 uses a very old package to resolve tsconfig.json, needed before TypeScript exposed config resolution features. This package doesn’t support configuration inheritance. A PR has been started, but never finished and merged.

I found this bug while making Quasar framework work nicely with TS and Jest, in which a esModuleInterop property from a preset configuration wasn’t being picked up in the extending configuration, while everything worked fine when adding the property directly on the former.

Anyway, seems like the new V4 will support ts-jest which should manage inheritance correctly (it used native TS configuration management), so I guess the problem will be solved in some time.

Cya!

[vegerot]

I am using "@vue/cli-service": "4.5.8", and still experience this issue.

To test I:

1. Made a valid tsconfig.json (without extends), ran my test suite, and they passed
2. moved tsconfig.json to tsconfig.base.json and created tsconfig.json with contents:

{
  "extends": "./tsconfig.base.json"
}

1. Ran tests again, and they fail