Mocha throws UnparsableFileError instead of throwing the actual error when importing js/cjs

[nopeless]

Prerequisites

• Checked that your issue hasn't already been filed by cross-referencing issues with the faq label
• Checked next-gen ES issues and syntax problems by using the same environment and/or transpiler configuration without Mocha to ensure it isn't just a feature that actually isn't supported in the environment in question or a bug in your code.
• 'Smoke tested' the code to be tested by running it outside the real test suite to get a better sense of whether the problem is in the code under test, your usage of Mocha, or Mocha itself
• Ensured that there is no discrepancy between the locally and globally installed versions of Mocha. You can find them with: node node_modules/.bin/mocha --version(Local) and mocha --version(Global). We recommend that you not install Mocha globally.

Description

mocha would throw a UnparsableFileError when importing a js/cjs module that doesn't actually have syntax errors

Steps to Reproduce

.mocharc.cjs

require("0a9g"); //module that does not exist
require("chai"); // this is how I originally found the error
module.exports = {};

Expected behavior: [What you expect to happen]

Give some comprehensive error such as module "0a9g" does not exist

Actual behavior: [What actually happens]

Error: Unable to read/parse ./test/.mocharc.cjs: Error: Cannot find module './test/.mocharc.cjs'

Reproduces how often: [What percentage of the time does it reproduce?]

every time

version

mocha --version > 9.1.3
npm run mocha -- --version > 9.1.3 // edit: I forgot to add --
node node_modules/.bin/mocha --version
<SOURCEDIR>\node_modules\.bin\mocha:2
basedir=$(dirname "$(echo "$0" | sed -e 's,\\,/,g')")
          ^^^^^^^

SyntaxError: missing ) after argument list
node -v > v16.6.0

[nopeless]

bump

[sciffany]

Hi, first time contributor. May I take this issue please? Thank you.

[nopeless]

@sciffany what do you mean by "take this issue"

[sciffany]

@nopeless I want to try resolving this issue.

[nopeless]

@nopeless I want to try resolving this issue.

Sure. It would be nice if you did

[sciffany]

Made a PR #4826 to resolve this