Add check for "react-native" to the file type regex

lib/atom-react.coffee

@@ -93,7 +93,7 @@ class AtomReact
 
   isReact: (text) ->
     if not contentCheckRegex?
-      match = (atom.config.get('react.detectReactFilePattern') || '/require\\([\'"]react[\'"]\\)/').match(new RegExp('^/(.*?)/([gimy]*)$'));
+      match = (atom.config.get('react.detectReactFilePattern') || '/require\\([\'"]react(?:-native)?[\'"]\\)/').match(new RegExp('^/(.*?)/([gimy]*)$'));
       contentCheckRegex = new RegExp(match[1], match[2])
     return text.match(contentCheckRegex)?
 
@@ -105,7 +105,7 @@ class AtomReact
 
     path = require 'path'
 
-    # Check if file extension is .jsx or the file has require React
+    # Check if file extension is .jsx or the file requires React
     extName = path.extname(editor.getPath())
     if extName is ".jsx" or (extName is ".js" and @isReact(editor.getText()))
       jsxGrammar = atom.grammars.grammarsByScopeName["source.js.jsx"]

spec/atom-react-spec.coffee

@@ -1,5 +1,6 @@
 describe "React tests", ->
   sampleCorrectFile = require.resolve './fixtures/sample-correct.js'
+  sampleCorrectNativeFile = require.resolve './fixtures/sample-correct-native.js'
   sampleInvalidFile = require.resolve './fixtures/sample-invalid.js'
 
   beforeEach ->
@@ -20,6 +21,12 @@ describe "React tests", ->
           expect(editor.getGrammar().scopeName).toEqual 'source.js.jsx'
           editor.destroy()
 
+    it "should select source.js.jsx if file has require('react-native')", ->
+      waitsForPromise ->
+        atom.workspace.open(sampleCorrectNativeFile, autoIndent: false).then (editor) ->
+          expect(editor.getGrammar().scopeName).toEqual 'source.js.jsx'
+          editor.destroy()
+
     it "should select source.js if file doesnt have require('react')", ->
       waitsForPromise ->
         atom.workspace.open(sampleInvalidFile, autoIndent: false).then (editor) ->

spec/fixtures/sample-correct-native.js

@@ -0,0 +1 @@
+var React = require('react-native');