From fa661f366407c1115e123b29c9ae21f3383e6a50 Mon Sep 17 00:00:00 2001
From: Ryan Zimmerman <17342435+RyanZim@users.noreply.github.com>
Date: Tue, 14 May 2019 13:12:27 -0400
Subject: [PATCH] Add support for fs.realpath.native in envs that support it
 (#682)

* Add support for fs.realpath.native in envs that support it

* Add test for realpathSync.native

* assert.equal -> assert.strictEqual
---
 lib/fs/__tests__/realpath.test.js | 33 +++++++++++++++++++++++++++++++
 lib/fs/index.js                   |  5 +++++
 2 files changed, 38 insertions(+)
 create mode 100644 lib/fs/__tests__/realpath.test.js

diff --git a/lib/fs/__tests__/realpath.test.js b/lib/fs/__tests__/realpath.test.js
new file mode 100644
index 00000000..59ee6fa3
--- /dev/null
+++ b/lib/fs/__tests__/realpath.test.js
@@ -0,0 +1,33 @@
+'use strict'
+
+const fs = require('fs')
+const fse = require('../..')
+const assert = require('assert')
+
+/* eslint-env mocha */
+
+// fs.realpath.native only available in Node v9.2+
+if (typeof fs.realpath.native === 'function') {
+  describe('realpath.native', () => {
+    it('works with callbacks', () => {
+      fse.realpath.native(__dirname, (err, path) => {
+        assert.ifError(err)
+        assert.strictEqual(path, __dirname)
+      })
+    })
+
+    it('works with promises', (done) => {
+      fse.realpath.native(__dirname)
+        .then(path => {
+          assert.strictEqual(path, __dirname)
+          done()
+        })
+        .catch(done)
+    })
+
+    it('works with sync version', () => {
+      const path = fse.realpathSync.native(__dirname)
+      assert.strictEqual(path, __dirname)
+    })
+  })
+}
diff --git a/lib/fs/index.js b/lib/fs/index.js
index 8ffdf7b0..a7b22922 100644
--- a/lib/fs/index.js
+++ b/lib/fs/index.js
@@ -102,3 +102,8 @@ exports.write = function (fd, buffer, ...args) {
     })
   })
 }
+
+// fs.realpath.native only available in Node v9.2+
+if (typeof fs.realpath.native === 'function') {
+  exports.realpath.native = u(fs.realpath.native)
+}