A plugin for mocha that will cause your test suite to fail if less than 90% of the tests in the suite are executed.
This helps to catch erroneous .only statements that might be added for development/debugging but get accidentally committed.
To use simply pass nonly as a value to the --require flag for mocha
$ mocha --require nonly
Or add the following line to your mocha.opts file:
--require nonly
The --forbid-only flag causes test suites to fail completely without executing when .only is used. This means that if someone is using .only locally for development and debugging then they'll likely also remove this flag to allow the test suite to run.
That means they're potentially likely to also accidentally commit the removal of this flag.
Using nonly allows the test suites to run exactly as normal, and only fails if test execution falls below 90%.