apeman-task-coverage/lib/define.js

/**
 * apeman task to measure coverage.
 * @memberof module:apeman-task-coverage/lib
 * @function define
 * @param {string} script - Script to run for coverage.
 * @param {options} [options] - Optional settings.
 * @param {string} [options.out="coverage"] - Output directory.
 * @returns {function} - Defined task function.
 */

'use strict'

const execcli = require('execcli')
const co = require('co')

/** @lends define */
function define (script, options = {}) {
  let out = options.out || 'coverage'

  /**
   * Defined task.
   * @function task
   * @param {object} context - Apeman task context.
   * @returns {Promise}
   */
  function task (context) {
    let { logger } = context

    logger.debug('Measure coverage with script:', script)
    let cmdArgs = [ 'cover' ].concat(script.split(' ')).concat({
      dir: out
    })
    return co(function * () {
      return yield define.istanbul(cmdArgs)
    })
  }

  task.$desc = 'Measure test coverage.'
  return task;
}

define.istanbul = function istanbul (args) {
  return execcli.npmBin('istanbul', args, {
    notfound: 'try `npm install istanbul -g`',
    search: [ process.cwd(), __dirname ]
  })
}

module.exports = define