From 7279d2b20766554f660b431ce595342adcefec8b Mon Sep 17 00:00:00 2001
From: Luke Childs <lukechilds123@gmail.com>
Date: Wed, 22 Feb 2017 23:41:23 +0700
Subject: [PATCH] Add test for dataURL with callback always returning image
 data async

---
 test/canvas.test.js | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/test/canvas.test.js b/test/canvas.test.js
index 72bf6be..006e776 100644
--- a/test/canvas.test.js
+++ b/test/canvas.test.js
@@ -519,6 +519,14 @@ describe('Canvas', function () {
       });
     });
 
+    it('toDataURL(function (err, str) {...}) is async even with no canvas data', function (done) {
+      new Canvas().toDataURL(function(err, str){
+        assert.ifError(err);
+        assert.ok('data:,' === str);
+        done();
+      });
+    });
+
     it('toDataURL(0.5, function (err, str) {...}) works and defaults to PNG', function (done) {
       new Canvas(200,200).toDataURL(0.5, function(err, str){
         assert.ifError(err);