Testdata: add basic tank simulation (#47990)

2022-04-20 12:01:09 -07:00
parent ce89d7e874
commit 72b5af8d9b
3 changed files with 158 additions and 1 deletions
@@ -66,6 +66,7 @@ func NewSimulationEngine() (*SimulationEngine, error) {
 	initializers := []simulationInitializer{
 		newFlightSimInfo,
 		newSinewaveInfo,
+		newTankSimInfo,
 	}

 	for _, init := range initializers {
@@ -155,7 +156,10 @@ func (s *SimulationEngine) QueryData(ctx context.Context, req *backend.QueryData
 			maxPoints := q.MaxDataPoints * 2
 			for i := int64(0); i < maxPoints && timeWalkerMs < to; i++ {
 				t := time.UnixMilli(timeWalkerMs).UTC()
-				appendFrameRow(frame, sim.GetValues(t))
+				vals := sim.GetValues(t)
+				if vals != nil { // nil is returned when you ask for an invalid time
+					appendFrameRow(frame, vals)
+				}
 				timeWalkerMs += stepMillis
 			}
 		}