Merge pull request kubernetes#3702 from towca/jtuznik/simulator-fix

Fix an out-of-bound array access in simulator.TestClear()

Author: k8s-ci-robot

cluster-autoscaler/simulator/cluster_snapshot_benchmark_test.go

@@ -53,6 +53,10 @@ func createTestPods(n int) []*apiv1.Pod {
 }
 
 func assignPodsToNodes(pods []*apiv1.Pod, nodes []*apiv1.Node) {
+	if len(nodes) == 0 {
+		return
+	}
+
 	j := 0
 	for i := 0; i < len(pods); i++ {
 		if j >= len(nodes) {

cluster-autoscaler/simulator/cluster_snapshot_test.go

@@ -240,8 +240,8 @@ func TestClear(t *testing.T) {
 	// Run with -count=1 to avoid caching.
 	localRand := rand.New(rand.NewSource(time.Now().Unix()))
 
-	nodeCount := localRand.Intn(100)
-	podCount := localRand.Intn(1000)
+	nodeCount := localRand.Intn(99) + 1
+	podCount := localRand.Intn(999) + 1
 	extraNodeCount := localRand.Intn(100)
 	extraPodCount := localRand.Intn(1000)