Use single test

example/__tests__/index.android.js

@@ -1,10 +0,0 @@
-import 'react-native'
-import React from 'react'
-import Index from '../index.android.js'
-
-// Note: test renderer must be required after react-native.
-import renderer from 'react-test-renderer'
-
-it('renders correctly', () => {
-  const tree = renderer.create(<Index />)
-})

example/__tests__/index.ios.js → example/__tests__/index.js

@@ -1,6 +1,6 @@
 import 'react-native'
 import React from 'react'
-import Index from '../index.ios.js'
+import Index from '../index.js'
 
 // Note: test renderer must be required after react-native.
 import renderer from 'react-test-renderer'