kubeconfig_test: cleanup temp kubeconfig file

Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>

pkg/minikube/kubeconfig/context_test.go

@@ -26,6 +26,7 @@ import (
 func TestDeleteContext(t *testing.T) {
 	// See kubeconfig_test
 	fn := tempFile(t, kubeConfigWithoutHTTPS)
+	defer os.Remove(fn)
 	if err := DeleteContext("la-croix", fn); err != nil {
 		t.Fatal(err)
 	}

pkg/minikube/kubeconfig/kubeconfig_test.go

@@ -263,6 +263,7 @@ func TestVerifyEndpoint(t *testing.T) {
 		t.Run(test.description, func(t *testing.T) {
 			t.Parallel()
 			configFilename := tempFile(t, test.existing)
+			defer os.Remove(configFilename)
 			err := VerifyEndpoint("minikube", test.hostname, test.port, configFilename)
 			if err != nil && !test.err {
 				t.Errorf("Got unexpected error: %v", err)
@@ -330,6 +331,7 @@ func TestUpdateIP(t *testing.T) {
 		t.Run(test.description, func(t *testing.T) {
 			t.Parallel()
 			configFilename := tempFile(t, test.existing)
+			defer os.Remove(configFilename)
 			statusActual, err := UpdateEndpoint("minikube", test.hostname, test.port, configFilename)
 			if err != nil && !test.err {
 				t.Errorf("Got unexpected error: %v", err)
@@ -419,6 +421,7 @@ func Test_Endpoint(t *testing.T) {
 	for _, test := range tests {
 		t.Run(test.description, func(t *testing.T) {
 			configFilename := tempFile(t, test.cfg)
+			defer os.Remove(configFilename)
 			hostname, port, err := Endpoint("minikube", configFilename)
 			if err != nil && !test.err {
 				t.Errorf("Got unexpected error: %v", err)