From 9c9625eb766bb75f53d1a2e807cc4efa66f1e66e Mon Sep 17 00:00:00 2001
From: Ash Wilson <smashwilson@github.com>
Date: Tue, 20 Jun 2017 15:44:05 -0400
Subject: [PATCH] Helpers to promisify functions in specs

---
 spec/async-spec-helpers.js | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/spec/async-spec-helpers.js b/spec/async-spec-helpers.js
index 8bc36c913..84a592c6a 100644
--- a/spec/async-spec-helpers.js
+++ b/spec/async-spec-helpers.js
@@ -72,3 +72,27 @@ export function emitterEventPromise (emitter, event, timeout = 15000) {
     })
   })
 }
+
+export function promisify (original) {
+  return function (...args) {
+    return new Promise((resolve, reject) => {
+      args.push((err, ...results) => {
+        if (err) {
+          reject(err)
+        } else {
+          resolve(...results)
+        }
+      })
+
+      return original(...args)
+    })
+  }
+}
+
+export function promisifySome (obj, fnNames) {
+  const result = {}
+  for (fnName of fnNames) {
+    result[fnName] = promisify(obj[fnName])
+  }
+  return result
+}