fix hovertemplate test not being run

Author: antoinerg

test/jasmine/tests/hover_label_test.js

@@ -1557,9 +1557,10 @@ describe('hover info', function() {
             Plotly.plot(createGraphDiv(), mockCopy.data, mockCopy.layout).then(done);
         });
 
-        it('should format labels according to a template string', function() {
+        it('should format labels according to a template string', function(done) {
             var gd = document.getElementById('graph');
-            Plotly.restyle(gd, 'data[0].hovertemplate', '%{y:$.2f}').then(function() {
+            Plotly.restyle(gd, 'hovertemplate', '%{y:$.2f}')
+            .then(function() {
                 Fx.hover('graph', evt, 'xy');
 
                 var hoverTrace = gd._hoverdata[0];
@@ -1573,7 +1574,9 @@ describe('hover info', function() {
                     nums: '$1.00',
                     axis: '0.388'
                 });
-            });
+            })
+            .catch(failTest)
+            .then(done);
         });
     });
 });