fix failing tests

Signed-off-by: Evans Mungai <mbuevans@gmail.com>

pkg/downloader/chart_downloader_test.go

@@ -21,10 +21,12 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 
 	"helm.sh/helm/v4/internal/test/ensure"
 	"helm.sh/helm/v4/pkg/cli"
 	"helm.sh/helm/v4/pkg/getter"
+	"helm.sh/helm/v4/pkg/registry"
 	"helm.sh/helm/v4/pkg/repo"
 	"helm.sh/helm/v4/pkg/repo/repotest"
 )
@@ -61,10 +63,14 @@ func TestResolveChartRef(t *testing.T) {
 		{name: "oci ref with sha256 and version mismatch", ref: "oci://example.com/install/by/sha:0.1.1@sha256:d234555386402a5867ef0169fefe5486858b6d8d209eaf32fd26d29b16807fd6", version: "0.1.2", fail: true},
 	}
 
+	registryClient, err := registry.NewClient()
+	require.NoError(t, err)
+
 	c := ChartDownloader{
 		Out:              os.Stderr,
 		RepositoryConfig: repoConfig,
 		RepositoryCache:  repoCache,
+		RegistryClient: registryClient,
 		Getters: getter.All(&cli.EnvSettings{
 			RepositoryConfig: repoConfig,
 			RepositoryCache:  repoCache,

pkg/registry/client.go

@@ -781,6 +781,7 @@ func (c *Client) Tags(ref string) ([]string, error) {
 	if err != nil {
 		return nil, err
 	}
+
 	repository.PlainHTTP = c.plainHTTP
 	repository.Client = c.authorizer