remove kubectl download, update helm-test command

test/run-helm-tests.sh

@@ -15,21 +15,20 @@
 #!/bin/bash
 
 # This runs helm tests for a release using `helm test` command
-K8S_VERSION=${KUBERNETES_VERSION:-v1.18.2}
-curl -Lo kubectl https://storage.googleapis.com/kubernetes-release/release/${K8S_VERSION}/bin/linux/amd64/kubectl && chmod +x kubectl && sudo mv kubectl /usr/local/bin/
+K8S_VERSION=${KUBERNETES_VERSION:-v1.20.2}
 wget https://github.com/kubernetes-sigs/kind/releases/download/v0.9.0/kind-linux-amd64
 chmod +x kind-linux-amd64
 mv kind-linux-amd64 kind
 export PATH=$PATH:$PWD
 kind create cluster --image kindest/node:"${K8S_VERSION}" --config=./hack/kind_config.yaml
 
 helm install descheduler-ci --namespace kube-system ./charts/descheduler
-helm test descheduler-ci
+helm test descheduler-ci --namespace kube-system
 last_status=$?
 
-if [[ ! "${last_satus}" ]]; then
+if [[ "${last_status}" -eq 1 ]]; then
  echo "Helm test failed"
  exit 1
 fi
 echo "Helm test verified."
-kind delete cluster -v
+kind delete cluster