chai-enzyme/src/debug.js

Chai.js assertions for enzyme

import {prettyPrint} from 'html'

function indent (n) {
  return Array(n + 1).join(' ')
}

export default function debug (wrapper) {
  let html = null

  try {
    html = prettyPrint(wrapper.html(), { indent_size: 2 })
  } catch (err) {
    return `HTML: Not available due to: ${err.message}`
  }

  const out = `\n\nHTML:\n\n${html}`

  return out.split('\n').map((line) => {
    return indent(5) + line
  }).join('\n')
}