I use the mongodb library in TypeScript for a few functions (e.g. lambda functions but that should not matter).

The imports look like that:

import { ObjectId, Db, InsertOneResult } from "mongodb";

When I import the function in Jest and execute it I always get the error:

Module '"../../node_modules/mongodb/mongodb.ts34"' declares 'ObjectId' locally, but it is not exported.

I think something is wrong with my jest logic but I am not sure what. The function itself is working.

My jest config looks like that:

const tsPreset = require("ts-jest/jest-preset");

module.exports = {
  ...tsPreset,
  testEnvironment: "node",
  roots: ["<rootDir>/test"],
  testMatch: ["**/*.test.ts"],
  moduleNameMapper: {
    "^@/types/(.*)$": "<rootDir>/types/$1",
    "^@/lib/(.*)$": "<rootDir>/lib/$1",
    "^@/functions/(.*)$": "<rootDir>/functions/$1",
  },
};