"Mocha" not defined

[schrotie]

Prerequisites

• [ x] Checked that your issue hasn't already been filed by cross-referencing issues with the faq label
• [x ] 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

With the update to 8.1.0 "Mocha" is no longer defined on the window object. This break backward compatibility for mocha-headless-chrome.

Steps to Reproduce

Run mocha-headless-chrome tests.

Expected behavior: [What you expect to happen]

Actual behavior: [What actually happens]

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

Versions

• The output of mocha --version and node node_modules/.bin/mocha --version:
• The output of node --version:
• Your operating system
  • name and version:
  • architecture (32 or 64-bit):
• Your shell (e.g., bash, zsh, PowerShell, cmd):
• Your browser and version (if running browser tests):
• Any third-party Mocha-related modules (and their versions):
• Any code transpiler (e.g., TypeScript, CoffeeScript, Babel) being used (and its version):

Additional Information

[philtrep]

We're also experiencing the same issue on our project. Mocha is loaded via a script tag and never appears in window.

Manually setting window.mocha = mocha from the script tag still results other functions not being available in the window scope Error: ReferenceError: describe is not defined. We can run mocha.setup('bdd') to get access to the describe (and other) functions but the error stays the same cannot read property 'reporters' of undefined.

[outsideris]

global Mocha was hidden by #4366 .

[outsideris]

Fixed by #4401