Remove dependency on create-react-class

- remove createClass export from src/react-compat
- add test/react-compat with createClass export
- change spec files to import createClass from test/react-compat
- undo changes to src/ReactWrapperComponent.jsx (use of createClass there removed in enzymejs#877
- update README with correct dependencies for react@15.5

README.md

@@ -71,7 +71,7 @@ If you are using `React >=15.5`, in addition to `enzyme`, you will have to ensur
 the following npm modules installed if they were not already:
 
 ```bash
-npm i --save-dev react-dom create-react-class
+npm i --save-dev react-test-renderer react-dom
 ```
 
 

src/ReactWrapperComponent.jsx

@@ -1,7 +1,5 @@
-import React from 'react';
-import PropTypes from 'prop-types';
+import React, { PropTypes } from 'react';
 import objectAssign from 'object.assign';
-import { createClass } from './react-compat';
 
 /* eslint react/forbid-prop-types: 0 */
 

src/react-compat.js

@@ -18,7 +18,6 @@ let childrenToArray;
 let renderWithOptions;
 let unmountComponentAtNode;
 let batchedUpdates;
-let createClass;
 let shallowRendererFactory;
 
 const React = require('react');
@@ -177,13 +176,6 @@ if (REACT013) {
   };
 }
 
-if (REACT155) {
-  // eslint-disable-next-line import/no-extraneous-dependencies
-  createClass = require('create-react-class');
-} else {
-  createClass = React.createClass;
-}
-
 function isDOMComponentElement(inst) {
   return React.isValidElement(inst) && typeof inst.type === 'string';
 }
@@ -219,5 +211,4 @@ export {
   renderWithOptions,
   unmountComponentAtNode,
   batchedUpdates,
-  createClass,
 };

test/ReactWrapper-spec.jsx

@@ -4,7 +4,8 @@ import React from 'react';
 import PropTypes from 'prop-types';
 import { expect } from 'chai';
 import sinon from 'sinon';
-import { batchedUpdates, createClass } from '../src/react-compat';
+import { batchedUpdates } from '../src/react-compat';
+import { createClass } from './react-compat'
 
 import {
   describeWithDOM,

test/ShallowWrapper-spec.jsx

@@ -3,7 +3,7 @@ import PropTypes from 'prop-types';
 import { expect } from 'chai';
 import sinon from 'sinon';
 
-import { createClass } from '../src/react-compat';
+import { createClass } from './react-compat';
 import { shallow, render, ShallowWrapper } from '../src/';
 import { describeIf, itIf, itWithData, generateEmptyRenderData } from './_helpers';
 import { ITERATOR_SYMBOL, withSetStateAllowed } from '../src/Utils';

test/react-compat.js

@@ -0,0 +1,14 @@
+import { REACT155 } from './version';
+
+let createClass;
+
+if (REACT155) {
+  // eslint-disable-next-line import/no-extraneous-dependencies
+  createClass = require('create-react-class');
+} else {
+  createClass = require('react').createClass;
+}
+
+export {
+  createClass,
+};

test/staticRender-spec.jsx

@@ -4,7 +4,7 @@ import { expect } from 'chai';
 import { describeWithDOM, describeIf } from './_helpers';
 import { render } from '../src/';
 import { REACT013 } from '../src/version';
-import { createClass } from '../src/react-compat';
+import { createClass } from './react-compat'
 
 describeWithDOM('render', () => {
   describeIf(!REACT013, 'context', () => {