Testing Sia-UI is fairly immature and needs many more tests written to aide development.
The testing environment has a lot of node modules that aren't used elsewhere in the app. The open source community really shines here in that the testing environment for our app, though using a somewhat obscure framework like electron, has a lot of node packages that cater to its testing needs.
The primary technology used for testing is since it seems to have some level of support for an electron framework. It is a module of node.js bindings for the older Selenium WebDriver.
You'll notice WebDriverIO isn't actually a devDependency in the package.json,
that's because there's a lot of heavy lifting to make WebDriverIO cooperate
with electron that is already done in this package. This module is super
useful and a great source of examples for testing and working with Javascript
Promises in general.
This is a popular choice for running series of tests within a node environment.
This module enables electron modules to be require()ed in js test files ran
by mocha.
This module allows for clean testing syntax in the form of behavior-driven-development (BDD).
This builds off of Chai and "pairs really nicely with" WebDriverIO as detailed in spectron's README