From 03ed52c5b46e9bae795d023f76f1ffeb895e090c Mon Sep 17 00:00:00 2001
From: Antoine Vandecreme <ant.vand@gmail.com>
Date: Wed, 4 Nov 2015 17:49:13 -0500
Subject: [PATCH] Remove duplicate isCanvasTainted function in tests.

---
 test/modules/basic.js | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/test/modules/basic.js b/test/modules/basic.js
index 7f095777..8b7a513b 100644
--- a/test/modules/basic.js
+++ b/test/modules/basic.js
@@ -314,23 +314,11 @@
             var canvas = document.createElement("canvas");
             var ctx = canvas.getContext("2d");
             ctx.drawImage(img, 0, 0);
-            callback(!isCanvasTainted(ctx));
+            callback(!OpenSeadragon.isCanvasTainted(canvas));
         };
         img.src = corsImg;
     }
 
-    function isCanvasTainted(context) {
-        var isTainted = false;
-        try {
-            // We test if the canvas is tainted by retrieving data from it.
-            // An exception will be raised if the canvas is tainted.
-            var url = context.getImageData(0, 0, 1, 1);
-        } catch (e) {
-            isTainted = true;
-        }
-        return isTainted;
-    }
-
     asyncTest( 'CrossOriginPolicyMissing', function () {
 
         viewer.crossOriginPolicy = false;
@@ -343,7 +331,8 @@
                 } ]
         } );
         viewer.addHandler('tile-drawn', function() {
-            ok(isCanvasTainted(viewer.drawer.context), "Canvas should be tainted.");
+            ok(OpenSeadragon.isCanvasTainted(viewer.drawer.context.canvas),
+                "Canvas should be tainted.");
             start();
         });
 
@@ -366,7 +355,8 @@
                         } ]
                 } );
                 viewer.addHandler('tile-drawn', function() {
-                    ok(!isCanvasTainted(viewer.drawer.context), "Canvas should not be tainted.");
+                    ok(!OpenSeadragon.isCanvasTainted(viewer.drawer.context.canvas),
+                        "Canvas should not be tainted.");
                     start();
                 });
             }