Add spec for pathwatcher module.

package.json

@@ -6,9 +6,11 @@
     "coffee-script": "~1.6.3",
     "coffeelint": "~0.6.1",
     "mocha": "~1.13.0",
+    "pathwatcher": "0.13.0",
     "walkdir": "~0.0.7",
     "runas": "0.3.0",
-    "formidable": "~1.0.14"
+    "formidable": "~1.0.14",
+    "temp": "~0.6.0"
   },
 
   "private": true,

spec/modules-spec.coffee

@@ -1,9 +1,11 @@
 assert = require 'assert'
 fs     = require 'fs'
 path   = require 'path'
+temp   = require 'temp'
 
 describe 'third-party module', ->
   fixtures = path.join __dirname, 'fixtures'
+  temp.track()
 
   describe 'runas', ->
     it 'can be required in renderer', ->
@@ -15,3 +17,13 @@ describe 'third-party module', ->
       child.on 'message', (msg) ->
         assert.equal msg, 'ok'
         done()
+
+  describe 'pathwatcher', ->
+    it 'emits file events correctly', (done) ->
+      pathwatcher = require 'pathwatcher'
+      temp.mkdir 'dir', (err, dir) ->
+        watcher = pathwatcher.watch dir, (event) ->
+          assert.equal event, 'change'
+          watcher.close()
+          done()
+        fs.writeFile path.join(dir, 'file'), ->