Update nginx data plane pod count

Author: bjee19

internal/mode/static/telemetry/collector.go

@@ -509,13 +509,17 @@ func parseDirectiveContextMapIntoLists(directiveContextMap map[sfDirectiveContex
 func getNginxPodCount(g *graph.Graph) int64 {
 	var count int64
 	for _, gateway := range g.Gateways {
+		replicas := int64(1)
+
 		np := gateway.EffectiveNginxProxy
 		if np != nil &&
 			np.Kubernetes != nil &&
 			np.Kubernetes.Deployment != nil &&
 			np.Kubernetes.Deployment.Replicas != nil {
-			count += int64(*np.Kubernetes.Deployment.Replicas)
+			replicas = int64(*np.Kubernetes.Deployment.Replicas)
 		}
+
+		count += replicas
 	}
 
 	return count

internal/mode/static/telemetry/collector_test.go

@@ -517,7 +517,9 @@ var _ = Describe("Collector", Ordered, func() {
 					1,
 				}
 
-				expData.NginxPodCount = int64(4)
+				// one gateway with one replica + one gateway with three replicas + one gateway with replica field
+				// empty
+				expData.NginxPodCount = int64(5)
 				expData.ControlPlanePodCount = int64(2)
 
 				data, err := dataCollector.Collect(ctx)
@@ -782,6 +784,7 @@ var _ = Describe("Collector", Ordered, func() {
 					GatewayAttachedNpCount:                   1,
 					BackendTLSPolicyCount:                    1,
 				}
+				expData.NginxPodCount = 1
 
 				data, err := dataCollector.Collect(ctx)