No support for --bail

[lerouxb]

I'd like to add support for a --bail cli parameter or a plugin that does that or something in my helper.. Basically it should stop testing the moment a test fails. I've read through the documentation on writing plugins, but it isn't immediately obvious to me how I would implement that. Any tips?

[lerouxb]

Actually..

This is what I came up with:

'use strict';

let failed = false;

module.exports = function () {

    return {
        name: 'teenytest-bail',
        supervisors: {
            userFunction: function (runUserFunction, metadata, cb) {

                if (failed) {
                    if (metadata.subType === 'test') {
                        console.log('# skip', metadata.description);
                    }
                    return cb();
                }

                runUserFunction(function bailWrappedCallback (err, result) {

                    if (err) {
                        failed = true;
                    }
                    cb(err, result);
                });
            }
        }
    };
};

[searls]

Nice! Does that work for you? I might use this myself.

In most testing frameworks I've used, what you're describing is frequently called "fail fast" and toggled with a --fail-fast flag. However I think you should name and publish this however you like!

[lerouxb]

It works like that, but it would be nice if it could be controlled from a CLI parameter before I publish it anywhere. I most recently used lab which calls it --bail. Mocha calls it --bail too, I believe.

[searls]

Again, the naming is totally your call! --fail-fast is an RSpec/Rubyism.

Also, it's been a couple years—does our API expose any way to add CLI flags?

Regardless, I suppose you could parse process.argv yourself in this plugin, and depending its config, figure out what the plugin should do.

[lerouxb]

https://github.com/lerouxb/teenytest-bail https://www.npmjs.com/package/teenytest-bail

I'm aware of the irony of it not having tests ;)

[searls]

Thanks @lerouxb -- would you mind opening a PR on teenytest to share the extension on the Readme?