fixed violin defaults

src/traces/violin/defaults.js

@@ -49,6 +49,9 @@ module.exports = function supplyDefaults(traceIn, traceOut, defaultColor, layout
     var meanLineVisible = coerce('meanline.visible', Boolean(meanLineColor || meanLineWidth));
     if(!meanLineVisible) traceOut.meanline = {visible: false};
 
+    coerce('tooltip');
+    coerce('tooltiptemplate');
+
     coerce('quartilemethod');
     coerce('zorder');
 };

test/image/mocks/tooltip_tooltiptemplate_violin_grouped.json

@@ -0,0 +1,93 @@
+{
+    "data":  [{
+        "type": "violin",
+        "name": "kale",
+        "y": [
+            0.2, 0.2, 0.6, 1, 0.5, 0.4,
+            0.2, 0.7, 0.9, 0.1, 0.5, 0.3
+         ],
+        "x": [
+            "day 1", "day 1", "day 1", "day 1", "day 1", "day 1",
+            "day 2", "day 2", "day 2", "day 2", "day 2", "day 2"
+         ],
+        "marker": {
+            "symbol": "line-ew",
+                "color": "#3D9970",
+            "line": {
+                "color": "#3D9970",
+                "width": 2
+            }
+        },
+        "points": "all",
+        "jitter": 0,
+        "span": [0, null],
+        "tooltiptemplate": "%{fullData.name}<br>x: %{x}<br>y: %{y}",
+        "tooltip": {"arrowcolor": "blue"}
+    }, {
+        "type": "violin",
+        "name": "radishes",
+        "y": [
+            0.6, 0.7, 0.3, 0.6, 0, 0.5,
+            0.7, 0.9, 0.5, 0.8, 0.7, 0.2
+         ],
+        "x": [
+            "day 1", "day 1", "day 1", "day 1", "day 1", "day 1",
+            "day 2", "day 2", "day 2", "day 2", "day 2", "day 2"
+         ],
+        "marker": {
+            "symbol": "line-ew",
+                "color": "#FF4136",
+            "line": {
+                "color": "#FF4136",
+                "width": 2
+            }
+        },
+        "points": "all",
+        "jitter": 0,
+        "span": [0, null],
+        "tooltiptemplate": "%{fullData.name}<br>x: %{x}<br>y: %{y}",
+        "tooltip": {"arrowcolor": "blue"}
+    }, {
+         "type": "violin",
+         "name": "carrots",
+         "y": [
+            0.1, 0.3, 0.1, 0.9, 0.6, 0.6,
+            0.9, 1, 0.3, 0.6, 0.8, 0.5
+         ],
+         "x": [
+            "day 1", "day 1", "day 1", "day 1", "day 1", "day 1",
+            "day 2", "day 2", "day 2", "day 2", "day 2", "day 2"
+         ],
+         "marker": {
+            "symbol": "line-ew",
+                "color": "#FF851B",
+            "line": {
+                "color": "#FF851B",
+                "width": 2
+            }
+         },
+        "points": "all",
+        "jitter": 0,
+        "span": [0, null],
+        "tooltiptemplate": "%{fullData.name}<br>x: %{x}<br>y: %{y}",
+        "tooltip": {"arrowcolor": "blue"}
+    }],
+    "layout": {
+        "yaxis": {
+            "zeroline": false,
+            "title": {"text": "normalized moisture"}
+        },
+        "violinmode": "group"
+    },
+    "config": {
+      "editable": true,
+      "modeBarButtonsToAdd": [
+         "tooltip",
+         "hoverclosest",
+         "hovercompare",
+         "togglespikelines"
+      ],
+      "displaylogo": false,
+      "displayModeBar": true
+    }
+}