test.js

'use strict'
var expect = require('chai').expect;
var React = require('react');
var PropTypes = require('react').PropTypes;
var addIsDeprecated = require('./dist').addIsDeprecated;
var deprecate = require('./dist').deprecate;


describe('react-is-deprecated', () => {
  Object.freeze(PropTypes)
  it('should not mutate the React PropTypes API', () => {
    let initialObjectType = PropTypes.object
    const NewPropTypes = addIsDeprecated(PropTypes)
    expect(PropTypes.object.isDeprecated).to.equal(undefined)
    expect(PropTypes.object === initialObjectType).to.equal(true)
  })
  console.log('PropTypes before tests', PropTypes.object.isDeprecated);
  it('should export an `addIsDeprecated` function', () => {
    expect(addIsDeprecated).to.be.a('function')
  })
  it('should export an `deprecate` function', () => {
    expect(deprecate).to.be.a('function')
  })
  it('should add an isDeprecated method to the passed PropTypes.', () => {
    const NewPropTypes = addIsDeprecated(PropTypes)
    expect(NewPropTypes.object.isDeprecated).to.be.a('function')
  })
})