Unable to detect exports from bundled webpack output

Title is probably inaccurate 😅

I recently added bundling to Jest, and it seems the output makes the lexer not detect exports correctly.

Specifically, it picks up the exports. stuff that is not exported, but not the exports within Object.definedProperty which actually are.

Quickest reproduction I have is to clone Jest, run yarn && yarn build:js then this:

const fs = require('fs');
const {parse} = require('cjs-module-lexer');

const source = fs.readFileSync(require.resolve('jest-watcher'), 'utf8');

console.log(parse(source));

This prints

{
  exports: [
    'default',
    'KEYS',
    'printPatternCaret',
    'printRestoredPatternCaret'
  ],
  reexports: []
}

Running the parser on the published version (29.7.0) gives this:

{
  exports: [
    '__esModule',
    'BaseWatchPlugin',
    'JestHook',
    'PatternPrompt',
    'Prompt',
    'TestWatcher'
  ],
  reexports: [ './constants', './lib/patternModeHelpers' ]
}

The reexports are of course gone as it's bundled, but we're also seeing that the lexer has detected only the resolved re-exports?

Clone the Jest revision linked in the issue, run yarn && yarn build:js, and reproduce the result with the shown cjs-module-lexer parse script. Compare the bundled output with the published package and trace how the lexer handles exports. and Object.defineProperty; done means bundled Jest exports are detected accurately without the false positives.