@bbc/nightwatch-commands

Keywords

• elementCount
• getVersionNumbers
• hideElement
• screenSize
• setCheckbox
• setDropdown

elementCount

Purpose

Read the number of elements that match a certain criteria

Parameters

• The elementCount(locateStrategy, selector, count) keyword has three required parameters:
  • locateStrategy - can be something like css selector or xpath and is based on the selector
  • selector - is way in which we identify the element
  • count - is the number of items that we are expecting there to be

How it works

It checks the number of elements which match the selector and if it does not match the count given then it will fail the assertion.

Example

browser.page.<page>.assert.elementCount('css selector', 'ol li', 7);

getVersionNumbers

Purpose

This extracts the version number of a product from the HTML source

Parameters

The getVersionNumber(['name']) keyword accepts an array of names.

How it works

It reads in the HTML source of a page and then parses it to look for the name which is of the format name/xx.yy.zz. Where xx.yy.zz are the version numbers.

Example

browser.page.<page>.getVersionNumbers(['name']);

hideElement

Purpose

This can hide an element from the page and is useful for when performing screen comparisons and ignoring certain sections of the page

Parameters

The hideElement(elementId) keyword accepts an element ID.

How it works

It edits the styling of the HTML in question to turn the opacity to full, so it is transparent.

Example

browser.page.<page>.hideElement(elementId);

screenSize

Purpose

This provides a way of us getting the width of the browser window so we can vary the assertions in a test accordingly. For example the layout of modules is different at different screen widths.

The nightwatch supported way for getting the screen width does not work on Firefox, or the iPhone. This function provides an alternate way of doing this.

How it works

It runs some javascript in the browser which returns the width of the browser window, and returns it in the callback.

Example

browser.screenSize(function (screenSize) {
  if (screenSize >= 600) {
    // verify something on a large screen 
  } else {
    // verify something on a small screen 
  }
});

setCheckbox

Purpose

This provides a way of setting a checkbox to either true/false regardless of it's current state

Parameters

• The setCheckbox(locateStrategy, selector, value) keyword has three required parameters:
  • locateStrategy - can be something like css selector or xpath and is based on the selector
  • selector - is way in which we identify the element
  • value - this can either be true or false depending on whether we want it checked or not

How it works

It checks the current value of the checkbox and if it does not match the value given then it will change it to be the correct value, however if it is the correct value then it will carry on without changing anything.

Example

browser.page.object.setCheckbox('css selector', '<checkbox selector>', true)

setDropdown

Purpose

This provides a way of setting a select dropdown option

Parameters

• The setDropdown(selector, value) keyword has two required parameters:
  • selector - is way in which we identify the element
  • value - is the value which is provided inside the <option value="XXX">

How it works

It clicks the dropdown menu to show the options and then selects the appropriate value

Example

browser.page.object.setDropdown('bodyColor', '#77BC30')