fixes for jasmine test

Author: archmoj

src/plots/gl3d/layout/defaults.js

@@ -101,7 +101,7 @@ function handleGl3dDefaults(sceneLayoutIn, sceneLayoutOut, coerce, opts) {
         sceneLayoutIn.dragmode = 'turntable';
     }
 
-    if(!sceneLayoutIn.dragmode) {
+    if(sceneLayoutIn.dragmode !== undefined) {
         // Because the default is now set to orbit mode
         // (i.e. in order to apply camera.z.up at init time)
         // we set turnable our disarable option here.

test/jasmine/tests/gl3d_plot_interact_test.js

@@ -394,7 +394,7 @@ describe('Test gl3d plots', function() {
 
     it('@gl should be able to reversibly change trace type', function(done) {
         var _mock = Lib.extendDeep({}, mock2);
-        var sceneLayout = { aspectratio: { x: 1, y: 1, z: 1 } };
+        var sceneLayout = { aspectratio: { x: 1, y: 1, z: 1 }, dragmode: 'turntable' };
 
         Plotly.plot(gd, _mock)
         .then(delay(20))