Vue, Vue CLI, Webpack template, Nightwatch and page obect pattern

Today I tried to use the page object pattern with Nightwatch.js that is created when using the webpack template in vue-cli. It turns out they are not configured by default. This means you need to add

page_objects_path: ['test/e2e/pages'],

to your tests/e2e/nightwatch.conf.js file to start using it.

The usage scenario is quite simple

1. Create a file describing the page
2. Use it in a test

Everything you need to know about page object pattern and Nightwatch is here so don't hesitate to check it out. Here's a basic example, the initial e2e test created when the app was scaffolded, but this time rewritten using page object patter.

// For authoring Nightwatch tests, see
// http://nightwatchjs.org/guide#usage

module.exports = {
  'default e2e tests': function (browser) {
    // automatically uses dev Server port from /config.index.js
    // default: http://localhost:8080
    // see nightwatch.conf.js
    const devServer = browser.globals.devServerURL

    browser.page.home()
      .open(devServer)
      .assertMainContentPresent()
      .assertHeaderText('Welcome to Your Vue.js App')
      .assertMainLogoPresent()

    browser.end()
  }
}

And now the page definition in tests/pages/home.js:

module.exports = {
  elements: {
    container: {
      selector: "#app"
    },
    hello: {
      selector: ".hello"
    },
    title: {
      selector: "h1"
    },
    logo: {
      selector: "#app > img"
    },
  },
  commands: [ {
    open(url) {
      return this
        .navigate(url)
        .waitForElementVisible('@container', 5000)
    },
    assertHeaderText(content) {
      return this.assert.containsText('@title', content)
    },
    assertMainContentPresent() {
      return this.assert.elementPresent('@hello')
    },
    assertMainLogoPresent() {
      return this.assert.elementCount('@logo', 1)
    },
  } ]
}

Basically a page object is what a module exports. It is divided into 3 sections

• elements - definition how to find certain elements
• commands - pieces of work the page does
• sections - (absent in this example)grouping mechanism for definitions

That's it