ES6 Spec Runner

• What is this? And why make it?
• Usage
• API
  • Create the runner
  • Initialise the runner

What is this? And why make it?

This package has been developed to provide a lightweight spec runner to generate an environment to unit/integration test your ES[6||2015] code.

It uses Rollup to compile your code and adds it to a JSDOM environment. You can also precompile your code and pass that in if you prefer use your own.

This package has been developed due to difficulties in unit/integration testing ES[6||2015]. Most of this issues we encountered were around stubbing and spying on dependencies.

Usage

With the package bundling your scripts

const { bundleRunner } = require('es-spec-runner');
const runner = bundleRunner({
  input: { file: 'this/is/the/file/location.js' },
  output: { },
  scriptDependencies: [ ]
});

runner({
  polyfills: {},
  fixture: '<div />'
}).then(({ dom }) => { /* run your assertions */ });

Providing your own custom bundle

const { bundleRunner } = require('es-spec-runner');
const runner = bundleRunner({
  input: { custom: 'window.foo = "bar";' },
  output: { },
  scriptDependencies: [ ]
});

runner({
  polyfills: {},
  fixture: '<div />'
}).then(({ dom }) => { /* run your assertions */ });

API

Create the runner

• options [Object] required - Consists of the following:
  • input [Object] required - Can consist of Rollup input options. Passing this in will bundle you scripts for you.
    • file [String] required (when not providing a custom value) - File path of the script to bundle.
    • custom [String] required (when not providing a file value) - Pass in a pre-bundled script, and skip over the package automatically bundling for you.
  • output [Object] optional - Can consist of Rollup output options. Passing this in will bundle you scripts for you.
  • scriptDependencies [Array] optional - Array of file locations that are required for your input to run e.g. lib/util files.

Initialise the runner

• fixture [String] optional - Markup to inject into the DOM.
• polyfills [Object] optional - Map of polyfills to assign to the window scope. Can also be used for stubbing / spying external dependencies.