mgs-graphql/lib/utils/invariant.js

The simple way to generates GraphQL schemas and Sequelize models from your models definition,microservice supported

/**
 * Copyright (c) 2013-present, Facebook, Inc.
 * All rights reserved.
 *
 * This source code is licensed under the BSD-style license found in the
 * LICENSE file in the root directory of this source tree. An additional grant
 * of patent rights can be found in the PATENTS file in the same directory.
 *
 */


'use strict'

/**
 * Use invariant() to assert state which your program assumes to be true.
 *
 * Provide sprintf-style format (only %s is supported) and arguments
 * to provide information about what broke and what you were
 * expecting.
 *
 * The invariant message will be stripped in production, but the invariant
 * will remain to ensure logic does not differ in production.
 */

var validateFormat = function validateFormat (format) {}

if (process.env.NODE_ENV !== 'production') {
  validateFormat = function validateFormat (format) {
    if (format === undefined) {
      throw new Error('invariant requires an error message argument')
    }
  }
}

function invariant (condition, format, a, b, c, d, e, f) {
  validateFormat(format)

  if (!condition) {
    var error
    if (format === undefined) {
      error = new Error('Minified exception occurred; use the non-minified dev environment ' + 'for the full error message and additional helpful warnings.')
    } else {
      var args = [a, b, c, d, e, f]
      var argIndex = 0
      error = new Error(format.replace(/%s/g, function () {
        return args[argIndex++]
      }))
      error.name = 'Invariant Violation'
    }

    error.framesToPop = 1 // we don't care about invariant's own frame
    throw error
  }
}

module.exports = invariant