Do I have to use Spectron to test Electron?

Recently I found some difficulty to plan automation testing for our application using Electron. I've tried to use Spectron, which looks like the official framework to test Electron apps, however, I found the documentation was very hard to understand on their website.

I know there are some famous apps using Electron, e.g Slack, Wordpress and Github Desktop. I wonder if they are really using Spectron or something else as automation to test their apps.

Pretty much I just want to figure out if Spectron is the only way to test Electron.