isObject helper fails in jest

Describe the bug

fromKeyLike does not return an object (JWK). If you use the output of this function in the latest version of node you get the following error:

TypeError: JWK must be an object

To Reproduce

Use Node v15.14.0.

  const key = crypto.generateKeyPairSync("ec", {
    namedCurve: "secp256k1",
  });
  const privateJwk = await fromKeyLike(key.privateKey);
     // ^^^^^^^^^^ this is not an object
  const privateKey = await parseJwk(privateJwk, "ES256K");                                  
  // TypeError: JWK must be an object

Expected behaviour Get proper object so as to be able to use JWK.

Environment:

• jose version: 3.11.4
• Typescript v4.2.4
• affected runtime is: Node.js v15.14.0

Additional context If anyone faces the same issue, there are two tricks that can save you:

• Do not use privateJwk in the next function as input but {...privateJwk } or
• After getting privateJwk set jwk.constructor = Object;

[maurolucc]

Alright. I’ve updated the gist I shared with you. Now you should be able to clone it and run:

nvm use 15.14.0
yarn
jest

You’ll see that the test fails for this node version but not for older. Notice that to make this test pass in my project I fix it with the trick found in AuxTest.ts, swtiching how I return JWK:

  // returning directly privateJwk provoke getting TypeError: JWK must be an object error
  /* return {
    hexPrivateKey,
    jwk: privateJwk,
    hexPublicKey,
  }; */
  // The code below makes the trick
  return {
    hexPrivateKey,
    jwk: { ...privateJwk }, 
    hexPublicKey,
  }; 

[panva]

@maurolucc that is of no help unfortunately. I have no clue what the package.json looks like, how you execute this, nor what the typescript configuration is.

I’m looking for a reproduction, e.g. such as that i can clone the gist, run npm i and then execute whatever command that reproduces the issue.