lib/index: bugfix fs contants. Closes #120

lib/index.js

@@ -2,16 +2,14 @@ var jsonFile = require('jsonfile')
 var json = require('./json')
 
 var fse = {}
-var fs = require('graceful-fs')
+var gfs = require('graceful-fs')
 
 // attach fs methods to fse
-Object.keys(fs).forEach(function (key) {
-  var func = fs[key]
-  if (typeof func === 'function') {
-    fse[key] = func
-  }
+Object.keys(gfs).forEach(function (key) {
+  fse[key] = gfs[key]
 })
-fs = fse
+
+var fs = fse
 
 var copy = require('./copy')
 fs.copy = copy.copy

test/fs-integration.test.js

@@ -1,6 +1,7 @@
 var assert = require('assert')
 var path = require('path')
 var os = require('os')
+var fs = require('fs')
 var fse = require('../')
 
 /* global afterEach, beforeEach, describe, it */
@@ -23,4 +24,11 @@ describe('native fs', function () {
     var data = fse.readFileSync(file, 'utf8')
     assert.equal(data, 'hello')
   })
+
+  it('should have native fs constants', function () {
+    // Node.js v0.12 / IO.js
+    if ('F_OK' in fs) {
+      assert.equal(fse.F_OK, fs.F_OK)
+    }
+  })
 })