From daec732aa60d5fe47c9ed8954cf663adc233bd56 Mon Sep 17 00:00:00 2001
From: Michael Casebolt <mikebolt@gmail.com>
Date: Sun, 29 Oct 2017 11:24:24 -0700
Subject: [PATCH] Add a test for zero-duration case.

---
 test/unit/tests.js | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/test/unit/tests.js b/test/unit/tests.js
index d62cf68..2473a0b 100644
--- a/test/unit/tests.js
+++ b/test/unit/tests.js
@@ -1125,6 +1125,20 @@
                 TWEEN.update(150);
                 test.equal(t.isPlaying(), false);
                 
+                test.done();
+            },
+
+            'A zero-duration tween finishes at its starting time without an error.': function(test) {
+                TWEEN.removeAll();
+
+		let object = {x: 0};
+                var t = new TWEEN.Tween(object).to({x:1}, 0);
+                t.start(0);
+                TWEEN.update(0);
+
+                test.equal(t.isPlaying(), false);
+		test.equal(object.x, 1);
+
                 test.done();
             },