Pull shallow renderer from react-test-renderer/shallow for React 15.5

package.json

@@ -23,7 +23,7 @@
     "react:clean": "rimraf node_modules/react node_modules/react-dom node_modules/react-addons-test-utils",
     "react:13": "rimraf node_modules/.bin/npm && npm run react:clean && npm i [email protected] && npm install",
     "react:14": "rimraf node_modules/.bin/npm && npm run react:clean && npm i [email protected] [email protected] [email protected] && npm install",
-    "react:15": "rimraf node_modules/.bin/npm && npm run react:clean && npm i react@15 react-dom@15 react-addons-test-utils@15 prop-types@15 create-react-class@15 && npm install",
+    "react:15": "rimraf node_modules/.bin/npm && npm run react:clean && npm i react@15 react-dom@15 react-addons-test-utils@15 prop-types@15 create-react-class@15 react-test-renderer@15 && npm install",
     "docs:clean": "rimraf _book",
     "docs:prepare": "gitbook install",
     "docs:build": "npm run docs:prepare && gitbook build",

src/react-compat.js

@@ -20,6 +20,7 @@ let unmountComponentAtNode;
 let batchedUpdates;
 let PropTypes;
 let createClass;
+let shallowRendererFactory;
 
 const React = require('react');
 
@@ -114,6 +115,26 @@ if (REACT013) {
     throw e;
   }
 
+  // Shallow renderer is accessible via the react-test-renderer package for React 15.5+.
+  // This is a separate package though and may not be installed.
+  try {
+    if (REACT155) {
+      // eslint-disable-next-line import/no-extraneous-dependencies
+      shallowRendererFactory = require('react-test-renderer/shallow').createRenderer;
+    } else {
+      // eslint-disable-next-line import/no-extraneous-dependencies
+      shallowRendererFactory = TestUtils.createRenderer;
+    }
+  } catch (e) {
+    // eslint-disable-next-line no-console
+    console.error(
+      'react-test-renderer is an implicit dependency in order to support [email protected]+. ' +
+      'Please add the appropriate version to your devDependencies. ' +
+      'See https://github.com/airbnb/enzyme#installation',
+    );
+    throw e;
+  }
+
   // Shallow rendering changed from 0.13 => 0.14 in such a way that
   // 0.14 now does not allow shallow rendering of native DOM elements.
   // This is mainly because the result of such a call should not realistically
@@ -122,7 +143,7 @@ if (REACT013) {
   // is essentially a replacement for `TestUtils.createRenderer` that doesn't use
   // shallow rendering when it's just a DOM element.
   createShallowRenderer = function createRendererCompatible() {
-    const renderer = TestUtils.createRenderer();
+    const renderer = shallowRendererFactory();
     const originalRender = renderer.render;
     const originalRenderOutput = renderer.getRenderOutput;
     let isDOM = false;