How to get WebStorm to run ESLint ruletester efficiently - mocha.js

Question

I am writing an ESLint plugin and I have been testing with eslint.RuleTester. This is okay, I know how to configure their test options argument but I always have to run the entire test file.
here is an example test file:
const {RuleTester} = require('eslint');
const rulester = new RuleTester({setup});
const rule = require ('myrule');
//this works also but i have to run the entire file (and thus all the tests)
ruleTester.run('myruletest',rule,{invalid,valid});
Normally, when I install a test runner I get a run/configuration for it and handy play⏯ and debug🐞 buttons in line with each test. As I write more tests (particularly in the same file) it would be handy to quickly click a => beside a test and run just that single test.
If I try to call ruletester.run from a mocha.it callback it will not report the test correctly (and definitely cannot debug / step into it).
e.g. this does not work well
const mocha = require('mocha');
const {RuleTester} = require('eslint');
const rulester = new RuleTester({setup});
const rule = require ('myrule');
// nice play button and custom run configruation but not honest test feeback
it('mytest', ()=>{
// it'll run this but will not report correctly -- `it` says it always passes
ruleTester.run('myruletest, rule, {invalid,valid});
});
it('mytest', async ()=>{
// async is of no help
await ruleTester.run('myruletest, rule, {invalid,valid});
});
//this still works also but then i have to run the entire file (and thus all the tests)
ruleTester.run('myruletest',rule,{invalid,valid});
So how do I tell WebStorm to either
recognize eslint.RuleTester as a testrunner
properly call and instance of RuleTester from my own testrunner?

Answer 1

Recognizing eslint.RuleTester as a test runner would require developing a special plugin.
See http://www.jetbrains.org/intellij/sdk/docs/ for basic documentation on plugin development. You can use existing plugins as example: Mocha runner is not fully open source, but its JavaScript part is open source (https://github.com/JetBrains/mocha-intellij); also, there is an open source plugin for Karma https://github.com/JetBrains/intellij-plugins/tree/master/js-karma