Added function and readme

README.md

@@ -1,2 +1,53 @@
 # react-proptype-error-catcher
 Causes React PropType errors to fail the test
+
+### Installation
+
+Using [npm](https://www.npmjs.com/):
+
+    $ npm install --save-dev react-proptype-error-catcher
+
+### Requirements
+
+* [React](https://github.com/facebook/react)
+* Testing with [sinon](https://github.com/sinonjs/sinon)
+* Testing with [enzyme](http://airbnb.io/enzyme/)
+
+### Usage
+
+``` js
+import React from 'react'
+import {
+  shallow,
+} from 'enzyme'
+
+import Example from './Example'
+import proptype_error_catcher from 'react-proptype-error-catcher'
+
+describe('<Example />', () => {
+  let sandbox
+  let props
+
+  beforeEach(() => {
+    sandbox = sinon.sandbox.create()
+
+    proptype_error_catcher(sandbox)
+
+    props = {
+      show: true,
+    }
+  })
+
+  afterEach(() => {
+    sandbox.restore()
+  })
+  it('with normal props it should render without errors', () => {
+    const wrapper = shallow(<Example {...props} />)
+    expect(wrapper).to.exist
+  })
+})
+```
+
+### API
+
+* Takes just one argument: a sinon.sandbox

index.js

@@ -0,0 +1,10 @@
+'use strict';
+
+function proptype_error_catcher (sandbox) {
+  sandbox.stub(console, 'error', function (message) {
+    if (!message.includes('Failed prop type')) return;
+    throw new Error(message);
+  });
+}
+
+module.exports = proptype_error_catcher;

package.json

@@ -0,0 +1,26 @@
+{
+  "name": "react-proptype-error-catcher",
+  "version": "1.0.0",
+  "description": "Causes React PropType errors to fail the test",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/CurtisHumphrey/react-proptype-error-catcher.git"
+  },
+  "keywords": [
+    "react",
+    "sinon",
+    "enzyme",
+    "testing",
+    "proptypes"
+  ],
+  "author": "Curtis M. Humphrey, Ph.D.",
+  "license": "MIT",
+  "bugs": {
+    "url": "https://github.com/CurtisHumphrey/react-proptype-error-catcher/issues"
+  },
+  "homepage": "https://github.com/CurtisHumphrey/react-proptype-error-catcher#readme"
+}