support nested arrow functions - fixes #60

test/fixtures/syntax/arrow-functions/nested/actual.js

@@ -0,0 +1,13 @@
+module.exports = {
+  init() {
+    return new Promise((resolve, reject) => {
+      MongoClient.connect(config.mongodb, (err, db) => {
+        if (err) {
+          return reject(err);
+        }
+        this.db = db;
+        resolve(this);
+      });
+    });
+  }
+};

test/fixtures/syntax/arrow-functions/nested/expected.js

@@ -0,0 +1,14 @@
+module.exports = {
+  init: function() {
+    var _this = this;
+    return new Promise(function(resolve, reject) {
+      MongoClient.connect(config.mongodb, function(err, db) {
+        if (err) {
+          return reject(err);
+        }
+        _this.db = db;
+        resolve(_this);
+      });
+    });
+  }
+};