breadknife/functions/checkIfTestSlicesEqual100.js

Simple A/B Testing Library

const isFloat = require('./isFloat')

module.exports = checkIfTestSlicesEqual100 = config => {
  const versions = Object.keys(config.split)

  let totalPercent = 0
  versions.forEach(version => {
    const versionPercentage = config.split[version]
    if (versionPercentage === undefined || !isFloat(versionPercentage)) {
      throw new Error('Invalid Version supplied in config.')
    }
    totalPercent += versionPercentage
  })
  if (totalPercent < 0.99 || totalPercent > 1)
    throw new Error('Test Split Total is not 100% please ensure all slices added together equals 1')
}