selectron-test

This modules exposes simple assertions against HTML structures based on CSS selectors. It is primarily useful if you wish to run numerous tests against an HTML document.

Example

let makeSelectron = require('selectron-test')
  , doc = getHTMLDocumentSomehow()
  , selectron = makeSelectron(doc)
;

// there is at least one element with a data-selectron attribute
selectron('[data-selectron]');

// there are exactly two p elements that are direct children of a header element
selectron('header > p', 2);

// the first p of the first header has text content exactly matching this sentence
selectron('header > p:first-of-type', 'I really think they are');

// there is no element with any of these classes
selectron('.comment-start, .comment-end, .insertion, .deletion', false);

// the last section in the article has an id attribute with value "conclusion"
selectron('article > section:last-of-type', { id: 'conclusion' });

API

The module exports a single makeSelectron(doc) function. It takes an HTML document or HTML element node that will serve as the context for the testing. This returns a selectron(css, value) function that can then be used to run as many tests as desired agains that specific context.

There are five ways of running a test against the context using the generated function:

• With no value: this just tests that the css selector matches something.
• With value being exactly false: tests non-existence of css.
• With a numeric value: will look for all nodes that match the selector and pass if the total number is the provided one.
• With a string value: will find the first element that matches the css, take its text content, and if that exactly matches the given string it passes.
• With value being an object: tests that there is a match and that it has attributes matching the key/value pairs in the object.