From d77a8b0a1d2a9421c84c6cd36ad9b3703a6908dc Mon Sep 17 00:00:00 2001
From: Marc Jansen <jansen@terrestris.de>
Date: Tue, 12 Mar 2013 16:09:58 +0100
Subject: [PATCH] Add an assertion to the dragchange handler.

This ensures that the result of resolution calculation stays inside of the
allowed bounds.
---
 src/ol/control/zoomslidercontrol.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/ol/control/zoomslidercontrol.js b/src/ol/control/zoomslidercontrol.js
index fbaaac77f6..3e9a151fdb 100644
--- a/src/ol/control/zoomslidercontrol.js
+++ b/src/ol/control/zoomslidercontrol.js
@@ -307,6 +307,8 @@ ol.control.ZoomSlider.prototype.handleSliderChange_ = function(e) {
   var map = this.getMap(),
       amountDragged = this.amountDragged_(e),
       res = this.resolutionForAmount_(amountDragged);
+  goog.asserts.assert(res >= this.minResolution_ && res <= this.maxResolution_,
+      'calculated new resolution is in allowed bounds.');
   if (res !== this.currentResolution_) {
     this.currentResolution_ = res;
     map.getView().setResolution(res);