I think this may be a common problem but couldn't find any information on this: Currently running into issues with Jest and external dependencies, wondering if this was documented somewhere on how to overcome it

I had this very same problem today after upgrading the file-type dependency and couldn't quickly find a way around it.

@Ash Rhazaly can I see your jest config?

Sure

"jest": {
    "collectCoverageFrom": [
      "src/**/*.ts",
      "test/**/*.ts",
      "!**/node_modules/**"
    ],
    "coverageReporters": [
      "html",
      "text",
      "text-summary",
      "cobertura"
    ],
    "setupFilesAfterEnv": [
      "./src/jest-test-setup.js"
    ],
    "testMatch": [
      "**/*.test.ts"
    ]
  }

is there a reason you added your own config instead of using the default?

jest-test-setup.js

jest.mock("./config", () => {
  return {
    ...jest.requireActual("./config"),
    log: jest.fn(),
  };
});

jest.mock("./common", () => {
  return {
    ...jest.requireActual("./common"),
  };
});

this needs settings to compile the typescript tests

Ah okay noted

did you install

esbuild-runner

? I'm not too sure because if you're calling jest directly SST isn't involved in the process

Yup just did, still running into the same output, I tried both methods of invoking jest directly and through SST the error output remains the same

Can you follow the instructions in the error message?

My next port of call when I get back to investigating this was using ts-jest@next https://kulshekhar.github.io/ts-jest/docs/next/guides/esm-support/

Yeah this is still bugging me and I'm tempted to just forgo the tests for now

Yeah, unfortunately for me, the

file-type

dependency has a major version update that causes this. They moved to pure ESM

I'm sorta running into this problem as well in an unrelated way. In the new gql starter we're wokrin gon we're using pure ESM and I just got around to setting up jest and it hasn't been straightfoward

Interesting, what I haven't gotten my head around is how to reliably have a mixed code base where some is ESM and some CommonJS