Fix random fails on TestPerform

Signed-off-by: Gaiaz Iusipov <g.iusipov@gmail.com>

pkg/action/action.go

@@ -357,7 +357,7 @@ func GetVersionSet(client discovery.ServerResourcesInterface) (chartutil.Version
 		versions = append(versions, k)
 	}
 
-	return chartutil.VersionSet(versions), nil
+	return versions, nil
 }
 
 // recordRelease with an update operation in case reuse has been set.
@@ -409,12 +409,12 @@ func (cfg *Configuration) Init(getter genericclioptions.RESTClientGetter, namesp
 			namespace,
 		)
 		if err != nil {
-			panic(fmt.Sprintf("Unable to instantiate SQL driver: %v", err))
+			return fmt.Errorf("unable to instantiate SQL driver: %w", err)
 		}
 		store = storage.Init(d)
 	default:
 		// Not sure what to do here.
-		panic("Unknown driver in HELM_DRIVER: " + helmDriver)
+		return fmt.Errorf("unknown driver in HELM_DRIVER %q", helmDriver)
 	}
 
 	cfg.RESTClientGetter = getter

pkg/kube/client.go

@@ -500,7 +500,7 @@ func delete(c *Client, resources ResourceList, propagation metav1.DeletionPropag
 		}
 		errs = append(errs, err)
 	}
-	if errs != nil {
+	if len(errs) != 0 {
 		return nil, errs
 	}
 	return res, nil

pkg/kube/client_test.go

@@ -21,6 +21,7 @@ import (
 	"io"
 	"net/http"
 	"strings"
+	"sync"
 	"testing"
 
 	v1 "k8s.io/api/core/v1"
@@ -296,7 +297,6 @@ func TestPerform(t *testing.T) {
 		name       string
 		reader     io.Reader
 		count      int
-		err        bool
 		errMessage string
 	}{
 		{
@@ -306,31 +306,33 @@ func TestPerform(t *testing.T) {
 		}, {
 			name:       "Empty manifests",
 			reader:     strings.NewReader(""),
-			err:        true,
 			errMessage: "no objects visited",
 		},
 	}
 
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
-			results := []*resource.Info{}
+			var (
+				results   = make([]*resource.Info, 0, tt.count)
+				resultsMu sync.Mutex
+			)
 
 			fn := func(info *resource.Info) error {
+				resultsMu.Lock()
+				defer resultsMu.Unlock()
+
 				results = append(results, info)
 				return nil
 			}
 
 			c := newTestClient(t)
 			infos, err := c.Build(tt.reader, false)
-			if err != nil && err.Error() != tt.errMessage {
-				t.Errorf("Error while building manifests: %v", err)
+			if err != nil {
+				t.Errorf("unexpected error while building manifests: %v", err)
 			}
 
 			err = perform(infos, fn)
-			if (err != nil) != tt.err {
-				t.Errorf("expected error: %v, got %v", tt.err, err)
-			}
-			if err != nil && err.Error() != tt.errMessage {
+			if tt.errMessage != "" && (err == nil || err.Error() != tt.errMessage) {
 				t.Errorf("expected error message: %v, got %v", tt.errMessage, err)
 			}