From 9ef8fe573334e5679808e860cb43c6b66bee2b08 Mon Sep 17 00:00:00 2001
From: Thomas Smith <tnsmith@live.nl>
Date: Mon, 27 Jun 2016 23:37:26 +0200
Subject: [PATCH] Fix MockInteractions.track to provide correct step values

---
 mock-interactions.js        |  4 ++--
 test/mock-interactions.html | 22 +++++++++++++++++-----
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/mock-interactions.js b/mock-interactions.js
index 9f717f9..42489db 100644
--- a/mock-interactions.js
+++ b/mock-interactions.js
@@ -151,8 +151,8 @@
    */
   function move(node, fromXY, toXY, steps) {
     steps = steps || 5;
-    var dx = Math.round((fromXY.x - toXY.x) / steps);
-    var dy = Math.round((fromXY.y - toXY.y) / steps);
+    var dx = Math.round((toXY.x - fromXY.x) / steps);
+    var dy = Math.round((toXY.y - fromXY.y) / steps);
     var xy = {
       x: fromXY.x,
       y: fromXY.y
diff --git a/test/mock-interactions.html b/test/mock-interactions.html
index 92aa96a..d4be619 100644
--- a/test/mock-interactions.html
+++ b/test/mock-interactions.html
@@ -36,11 +36,8 @@
         button = fixture('TrivialButton');
       });
 
-      teardown(function(done) {
-        // TODO(cdata): Remove when polymer/polymer#3540 is resolved
-        window.setTimeout(function() {
-          done();
-        }, 2500);
+      teardown(function() {
+        Polymer.Gestures.resetMouseCanceller();
       });
 
       suite('simulating tap', function() {
@@ -86,6 +83,21 @@
           });
         });
       });
+
+      suite('simulating track', function() {
+        test('dispatches events with correct steps', function() {
+          var spy = sinon.spy();
+          button.handleTrack = spy;
+          button.listen(button, 'track', 'handleTrack');
+          MockInteractions.track(button, 50, 50, 5);
+
+          var steps = [10, 20, 30, 40, 50, 50];
+          for (var i = 0, l = steps.length; i < l; i++) {
+            expect(spy.getCall(i).args[0].detail.dx).to.be.eql(steps[i]);
+            expect(spy.getCall(i).args[0].detail.dy).to.be.eql(steps[i]);
+          }
+        });
+      });
     });
 
   </script>