Add more debug code

Author: camdecoster

test/jasmine/tests/scatter3d_test.js

@@ -178,6 +178,16 @@ describe('Test scatter3d interactions:', function() {
     });
 
     fit('@gl should be able to toggle visibility', function(done) {
+        var originalOnerror = window.onerror;
+        window.onerror = function(msg, src, line, col, err) {
+            console.error('Uncaught error during toggle visibility test:',
+                msg, 'at', src + ':' + line + ':' + col,
+                err && err.stack ? '\nStack: ' + err.stack : ''
+            );
+            return false;
+        };
+        var cleanup = function(x) { window.onerror = originalOnerror; return x; };
+
         var _mock = Lib.extendDeep({}, mock2);
         _mock.data[0].x = [0, 1, 3];
         _mock.data[0].y = [0, 1, 2];
@@ -195,17 +205,24 @@ describe('Test scatter3d interactions:', function() {
         var order0 = [0, 0, 0, 0, 0, 1, 2];
 
         function assertObjects(expected) {
-            var scene = gd._fullLayout.scene;
+            var fullLayout = gd._fullLayout;
+            var scene = fullLayout && fullLayout.scene;
             var _scene = scene && scene._scene;
             var glplot = _scene && _scene.glplot;
             var objects = glplot && glplot.objects;
             console.log('assertObjects debug:',
+                'fullLayout:', !!fullLayout,
                 'scene:', !!scene,
                 '_scene:', !!_scene,
                 'glplot:', !!glplot,
                 'objects:', objects,
                 'objects type:', Object.prototype.toString.call(objects)
             );
+            if(!objects) {
+                fail('assertObjects: glplot.objects is not available (fullLayout=' + !!fullLayout +
+                    ', scene=' + !!scene + ', _scene=' + !!_scene + ', glplot=' + !!glplot + ')');
+                return;
+            }
             var actual = objects.map(function(o) {
                 return o._trace.data.index;
             });
@@ -248,6 +265,7 @@ describe('Test scatter3d interactions:', function() {
         .then(function() {
             assertObjects(order0);
         })
+        .then(cleanup, cleanup)
         .then(done, done.fail);
     });