Added test case dashboard

packages/grafana-ui/src/utils/processTimeSeries.ts

@@ -50,8 +50,8 @@ export function processTimeSeries({ timeSeries, nullValueMode }: Options): TimeS
         continue;
       }
 
-      if (typeof currentValue !== 'number') {
-        continue;
+      if (currentValue !== null && typeof currentValue !== 'number') {
+        throw {message: 'Time series contains non number values'};
       }
 
       // Due to missing values we could have different timeStep all along the series

public/app/features/dashboard/panel_model.ts

@@ -52,7 +52,6 @@ const mustKeepProps: { [str: string]: boolean } = {
   hasRefreshed: true,
   events: true,
   cacheTimeout: true,
-  nullPointMode: true,
   cachedPluginOptions: true,
   transparent: true,
 };

public/app/plugins/panel/gauge/GaugePanel.tsx

@@ -24,7 +24,7 @@ export class GaugePanel extends PureComponent<Props> {
 
     const vmSeries = processTimeSeries({
       timeSeries: timeSeries,
-      nullValueMode: NullValueMode.Ignore,
+      nullValueMode: NullValueMode.Null,
     });
 
     return (