scala-js-env-jsdom-nodejs's Introduction

scalajs-env-jsdom-nodejs

scalajs-env-jsdom-nodejs is a JavaScript environment for Scala.js (a JSEnv) running Node.js with jsdom.

This repository contains scalajs-env-jsdom-nodejs for Scala.js 1.x. In Scala.js 0.6.x, the Node.js with jsdom environment is part of the core distribution.

Setup

These instructions setup your test environment on Node.js such that you can write tests as if they were running on an HTML page.

Add the following line to project/plugins.sbt:

libraryDependencies += "org.scala-js" %% "scalajs-env-jsdom-nodejs" % "1.1.0"

and the following line to build.sbt (possibly in the settings/jsSettings of Scala.js projects):

jsEnv := new org.scalajs.jsenv.jsdomnodejs.JSDOMNodeJSEnv()

Finally, make sure that jsdom 10.0.0 or later is avilable in your project. You can install it with

$ npm install jsdom --save-dev

Or with yarn if you prefer

$ yarn add jsdom --dev

See the Scaladoc for other configuration options.

Usage - Writing a test

To access the dom, you will need to install scala-js-dom:

libraryDependencies += "org.scala-js" %%% "scalajs-dom" % "2.1.0"

Create a test in your favourite test framework, here is an example using MUnit.

import org.scalajs.dom.document

class ExampleJsDomTests extends munit.FunSuite {

  test("Example jsdom test") {
    val id = "my-fancy-element"
    val content = "Hi there and greetings!"

    // Create a new div element
    val newDiv = document.createElement("div")

    // Create an id attribute and assign it to the div
    val a = document.createAttribute("id")
    a.value = id
    newDiv.setAttributeNode(a)

    // Create some text content
    val newContent = document.createTextNode(content)

    // Add the text node to the newly created div
    newDiv.appendChild(newContent)

    // Add the newly created element and its content into the DOM
    document.body.appendChild(newDiv)

    // Find the element by id on the page, and compare the contents
    assertEquals(document.getElementById(id).innerHTML, content)
  }

}

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