Ts-jest: Troubles using it with TS3 and composite project

[emirotin]

Issue :

I'm unable to use it with TypeScript 3.0 and composite project

Expected behavior :

I expect the tests to work

Output from debug log :

_I didn't get the debug.txt_, but here's the test output.

a) with enableTsDiagnostics: true

 FAIL  test/testing.test.ts
  ● Test suite failed to run

    error TS6304: Composite projects may not disable declaration emit.

      at Object.runTsDiagnostics [as default] (../../node_modules/ts-jest/src/utils/run-ts-diagnostics.ts:16:11)
      at Object.preprocess [as process] (../../node_modules/ts-jest/src/preprocess.ts:46:21)

Test Suites: 1 failed, 1 total

b) with enableTsDiagnostics: false

 FAIL  test/testing.test.ts
  ● Test suite failed to run

    Debug Failure. Expected "use strict";
    describe('Testing a test', function () {
        it('should be true', function () {
            expect(true).toBeTruthy();
        });
    });
    //# sourceMappingURL=testing.test.js.map === undefined. Unexpected multiple outputs, file: /Users/emirotin/work/learn-a/packages/pkg2/test/testing.test.d.ts

      at Object.assertEqual (../../node_modules/typescript/lib/typescript.js:1389:17)
      at Object.writeFile (../../node_modules/typescript/lib/typescript.js:100504:30)
      at Object.__assign.writeFile (../../node_modules/typescript/lib/typescript.js:83117:596)
      at Object.writeFile (../../node_modules/typescript/lib/typescript.js:10573:14)
      at printSourceFileOrBundle (../../node_modules/typescript/lib/typescript.js:78709:16)
      at emitDeclarationFileOrBundle (../../node_modules/typescript/lib/typescript.js:78671:17)
      at emitSourceFileOrBundle (../../node_modules/typescript/lib/typescript.js:78589:13)
      at forEachEmittedFile (../../node_modules/typescript/lib/typescript.js:78497:30)
      at Object.emitFiles (../../node_modules/typescript/lib/typescript.js:78578:9)
      at emitWorker (../../node_modules/typescript/lib/typescript.js:83228:33)

Test Suites: 1 failed, 1 total

The latter coming from here: https://github.com/Microsoft/TypeScript/blob/master/src/services/transpile.ts#L79

Minimal repo :

https://github.com/emirotin/learn-a

[dotbear]

The first bug is a problem with ts-node which has been fixed here (awaiting release):
https://github.com/TypeStrong/ts-node/pull/657

The second bug is one that I am currently also experiencing and have been unable to solve.

[ahnpnl]

hi, we haven't looked into supporting TypeScript 3.x yet. We will take into account of this.

[gombosg]

Yup, turning off "composite": true in tsconfig.json solved this issue (we're still just experimenting with the composite project feature anyway).

[justinwaite]

I am receiving the same error (b). Hope to see support for this soon! Using TS3's new Project References feature along with Lerna in a monorepo.

[huafu]

@emirotin I am having issues cloning your minimal repo. At the step yarn build (after prepare):

❯ yarn build
yarn run v1.9.4
warning package.json: No license field
$ tsc -b packages
error TS6059: File '/Users/huafu/tools/tests/ts-jest/learn-a/packages/pkg2/test/testing.test.ts' is not under 'rootDir' '/Users/huafu/tools/tests/ts-jest/learn-a/packages/pkg2/src'. 'rootDir' is expected to contain all source files.

error Command failed with exit code 1.
info Visit https://yarnpkg.com/en/docs/cli/run for documentation about this command.

I'll try to change the exclude section... but why do we need to build to run tests?

[emirotin]

It's just part of my original setup in the real project. Also it ensures TS config is fine.

[huafu]

@emirotin if you feel like it, you can test our latest beta with your full project. See #697 ;-)

[hassankhan]

Hi @huafu, I just gave it a try in my project and it seems to work fine 👍

[huafu]

thanks, one thing to start with is remove most ts-jest specific config fom jest.config.js and replace it with the preset. Example:

https://github.com/huafu/bs-logger/commit/4b480a0957e9221fa778bc4646c4cbb1a903ff78#diff-2d0cd5d10b9604941c38c6aac608178a

[hassankhan]

Would it be possible to add *.integ.ts to the preset?

[huafu]

@hassankhan it's not one used by jest for JS files, ie not a standard one, so I don't think it's a good idea to add it to the preset. But it's a preset, and you can also grain extend it. Please for further question(s) related to beta or suggestions, use the new slack channel.