SlackReporter Silent Failure onComplete

[ChandlerFerry]

Problem

Trying to post a custom message with SlackReporter.postMessage() in the WDIO onComplete block while using the mocha framework with bdd causes the message to silently not be posted.

after, afterSession, afterSuite, etc. all function as expected.

Code

    onComplete: function () {
        console.log('aaaa');
        return new Promise((resolve, reject) => {
            SlackReporter.postMessage({
                channel: process.env.SLACK_CHANNEL,
                slackBotToken: process.env.SLACK_BOT_TOKEN,
                text: 'testing onComplete', // Never gets sent
            })
                .then(() => {
                    console.log('ssss'); // Never Fires
                    resolve('');
                })
                .catch(() => {
                    console.log('dddd'); // Never Fires
                    reject();
                });
        });
    },

Suboptimal Workaround Solution

Use npm package @slack/web-api instead to directly send the message to slack rather than having it wrapped in this library.

Context

Mocha considers every WDIO test to be it's own suite.
As such, sending the full details onComplete makes the reports in Slack legible.

In an ideal world, this reporter would allow me to dump the full details during onComplete, but unfortunately WDIOReporter does not expose onComplete.
As such, I am extending my onComplete hook to bridge the gap between the reporter and WDIO.