Add test for input change events

package.json

@@ -22,7 +22,9 @@
     "babel-preset-stage-0": "^6.5.0",
     "babel-register": "^6.5.2",
     "expect": "^1.14.0",
+    "jsdom": "^9.2.1",
     "mocha": "^2.4.5",
+    "mocha-jsdom": "^1.1.0",
     "onchange": "^2.0.0",
     "react": "^15.0.1",
     "react-addons-test-utils": "^15.0.1",

test/Input.spec.js

@@ -2,6 +2,7 @@
 import React from 'react'
 import TestUtils from 'react-addons-test-utils'
 import expect from 'expect'
+import jsdom from 'mocha-jsdom'
 import { Input, Label, Base, config } from '../src'
 
 const renderer = TestUtils.createRenderer()
@@ -185,5 +186,38 @@ describe('Input', () => {
       expect(tree.props.style.color).toEqual('tomato')
     })
   })
+
+  describe('events', () => {
+    jsdom()
+
+    context('when change event is fired', () => {
+      const spy = expect.createSpy()
+      const render = TestUtils.renderIntoDocument
+      class Root extends React.Component { render () { return this.props.children } }
+      let node
+
+      before(() => {
+        tree = render(
+          <Root>
+            <Input
+              name='test'
+              label='Test'
+              onChange={spy} />
+          </Root>
+        )
+        node = TestUtils.findRenderedDOMComponentWithTag(tree, 'input')
+        TestUtils.Simulate.change(node)
+      })
+
+      it('should call the onChange callback', () => {
+        expect(spy).toHaveBeenCalled()
+        expect(spy.calls.length).toEqual(1)
+      })
+
+      it('should not call the onChange twice', () => {
+        expect(spy.calls.length).toNotEqual(2)
+      })
+    })
+  })
 })