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Babel Setup

To write tests using next-generation JavaScript features, you can use Babel to compile your test files.

To do so, first install the necessary Babel dependencies:

npm install --save-dev @babel/core @babel/cli @babel/preset-env @babel/register

Make sure your babel.config.js is configured properly.

The simplest setup you can use is:

module.exports = {
    presets: [
        ['@babel/preset-env', {
            targets: {
                node: 12
            }
        }]
    ]
}

There are multiple ways to setup Babel using the WDIO testrunner.

If you are running Jasmine tests, you just need to register Babel in the before hook of your config file:

before: function() {
    require('@babel/register')
},

If you run Mocha or Cucumber tests, you can use internal require to register Babel:

mochaOpts: {
    ui: 'bdd',
    require: ['@babel/register', './test/helpers/common.js']
},

cucumberOpts: {
    requireModule: ['@babel/register'],
    require: ['./test/helpers/common.js']
},