event_protocol_formatter.js

import escapeStringRegexp from 'escape-string-regexp'
import Formatter from './'
import path from 'path'

const EVENT_NAMES = [
  'source',
  'attachment',
  'gherkin-document',
  'pickle',
  'pickle-accepted',
  'pickle-rejected',
  'test-run-started',
  'test-case-prepared',
  'test-case-started',
  'test-step-started',
  'test-step-attachment',
  'test-step-finished',
  'test-case-finished',
  'test-run-finished',
]

export default class EventProtocolFormatter extends Formatter {
  constructor(options) {
    super(options)
    EVENT_NAMES.forEach(eventName => {
      options.eventBroadcaster.on(eventName, data =>
        this.logEvent(eventName, data)
      )
    })

    const pathSepRegexp = new RegExp(escapeStringRegexp(path.sep), 'g')
    const pathToRemove =
      this.cwd.replace(pathSepRegexp, path.posix.sep) + path.posix.sep
    this.pathRegexp = new RegExp(escapeStringRegexp(pathToRemove), 'g')
  }

  logEvent(eventName, data) {
    const text = JSON.stringify(
      { type: eventName, ...data },
      ::this.formatJsonData
    )
    this.log(`${text}\n`)
  }

  formatJsonData(key, value) {
    if (value instanceof Error) {
      return value.stack.replace(this.pathRegexp, '')
    }
    return value
  }
}