TypeError: sourceMap.map.originalPositionFor is not a function

[jy95]

Do you want to request a feature or report a bug?
Bug about Manual Mocks with Filehound

What is the current behavior?

 FAIL  __tests__\methods\createFromJSON.ts
  ● Test suite failed to run

    TypeError: sourceMap.map.originalPositionFor is not a function

      1 | 'use strict';
    > 2 | const filehound = jest.genMockFromModule('filehound');
      3 | 
      4 | // temp files
      5 | let result;
      
      at mapSourcePosition (node_modules/source-map-support/source-map-support.js:213:42)
      at wrapCallSite (node_modules/source-map-support/source-map-support.js:357:20)
      at node_modules/source-map-support/source-map-support.js:392:26
          at Array.map (<anonymous>)
      at Function.prepareStackTrace (node_modules/source-map-support/source-map-support.js:391:24)
      at Object.setBounds (node_modules/bluebird/js/release/debuggability.js:677:42)
      at Object.<anonymous>.module.exports (node_modules/bluebird/js/release/promise.js:772:11)
      at Object.<anonymous> (node_modules/bluebird/js/release/bluebird.js:9:36)
      at Object.<anonymous> (node_modules/filehound/lib/filehound.js:13:17)
      at Object.<anonymous> (node_modules/filehound/index.js:1:107)
      at Object.<anonymous> (__mocks__/filehound.js:2:24)
      at Object.<anonymous> (lib/MediaScan.js:44:17)
      at Object.<anonymous> (__tests__/__helpers__/_constants.ts:6:21)
      at Object.<anonymous> (__tests__/methods/createFromJSON.ts:59:20)

If the current behavior is a bug, please provide the steps to reproduce and
either a repl.it demo through https://repl.it/languages/jest or a minimal
repository on GitHub that we can yarn install and yarn test.

No so much, just create a filehound.js inside a __mocks__ folder

// __mocks__/filehound.js

'use strict';
const filehound = jest.genMockFromModule('filehound');

// temp files
let result;

function find() {
    if (result !== undefined){
        return Promise.resolve(result);
    }
    // if nothing provided , throw error
    return Promise.reject(new Error("VAUDOU"));
}

function __setResult(ExpectedResult) {
    result = ExpectedResult;
}

filehound.__setResult = __setResult;
filehound.find = find;

module.exports = filehound;

What is the expected behavior?
It should work.

Please provide your exact Jest configuration and mention your Jest, node,
yarn/npm version and operating system.

Jest version : 22.3.0
Node version : 8.9.3
NPM version : 5.6.0
OS : Windows 10 Version 1709

My jest.config.js :

// jest.config.js
module.exports = {
    verbose: true,
    "moduleFileExtensions": [
        "ts",
        "tsx",
        "js"
    ],
    "transform": {
        "^.+\\.(ts|tsx)$": "<rootDir>/__tests__/__helpers__/preprocessor.js"
    },
    "testMatch": [
        "<rootDir>/__tests__/**/*.(ts|tsx|js)"
    ],
    "testPathIgnorePatterns": ["<rootDir>/node_modules/", "<rootDir>/__tests__/__helpers__/"],
    "automock": true, // just because I'm lazy to always add the 2 lines of mock modules ^^
    "unmockedModulePathPatterns": ['bluebird']
    // "collectCoverage": true
};

Edit : Without unmockedModulePathPatterns, I got TypeError: Cannot set property 'noConflict' of undefined like Issue 90

[SimenB]

This was actually fixed as part of #5177

[SimenB]

Wait no, I can't reproduce with jest 22.3.0. Can you create a repo showing the failure?

[jy95]

Ok, here is the repository : https://github.com/jy95/mediaScan .
For now, I use a ugly workaround for this case (basically , a short copy/paste of the compiled lib) : mock filehound.
Just to be clear, I first compile the src and then run the tests.

Edit : I just need to find out why the addNewPath method isn't working in Jest when It works in its ES6 version with AVA.

[SimenB]

I cannot reproduce your error.

I get this:

Can you create a branch in your repo I can checkout, run jest, and see the failure?

[jy95]

If you check the code of Filehound, you can see the methods create,paths,ext returns this (the current instance) and then the findmethod returns something so using the default jest.mock that returns by default undefined will not be useful ^^

[SimenB]

Can you create a branch with the necessary change so I can reproduce?

[jy95]

The only change is to replace the content of __mocks__/filehound.js with the one of my initial message.
Like jest show, it will crash before anything else is done :

 FAIL  __tests__\methods\createFromJSON.ts
  ● Test suite failed to run

    TypeError: sourceMap.map.originalPositionFor is not a function

      1 | 'use strict';
    > 2 | const filehound = jest.genMockFromModule('filehound');
      3 | 
      4 | // temp files
      5 | let result;

Edit : from what I see on your screen, it doesn't seem jest.genMockFromModule(moduleName) is doing its job very well

[SimenB]

I have placed the text from OP in __mocks__/filehound.js and I cannot reproduce (beyond the errors I got in the screenshot I posted).

Please push a branch I can pull down. Will close until then

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