fix registry test failures by adjusting DockerRegistryHost and auth server listener management

- Change DockerRegistryHost to use 127.0.0.1 for HTTP tests and helm-test-registry for TLS tests to match certificate hostname
- Add defer ln.Close() to prevent resource leak in token auth server setup
- Restore requestURL variable and assertion in test body instead of handler to avoid potential race condition

Signed-off-by: kimsm28 <sm28.kim@samsung.com>

pkg/registry/client_scope_test.go

@@ -45,7 +45,6 @@ func (suite *RegistryScopeTestSuite) TearDownSuite() {
 func (suite *RegistryScopeTestSuite) Test_1_Check_Push_Request_Scope() {
 
 	var requestURL string
-
 	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		requestURL = r.URL.String()
 		w.WriteHeader(http.StatusOK)
@@ -70,13 +69,11 @@ func (suite *RegistryScopeTestSuite) Test_1_Check_Push_Request_Scope() {
 
 	//check the url that authentication server received
 	suite.Equal("/auth?scope=repository%3Atestrepo%2Flocal-subchart%3Apull%2Cpush&service=testservice", requestURL)
-
 }
 
 func (suite *RegistryScopeTestSuite) Test_2_Check_Pull_Request_Scope() {
 
 	var requestURL string
-
 	handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		requestURL = r.URL.String()
 		w.WriteHeader(http.StatusOK)

pkg/registry/registry_test.go

@@ -133,11 +133,14 @@ func setup(suite *TestRegistry, tlsEnabled, insecure bool, auth string) {
 	suite.Require().NoError(err, "no error finding free port for test registry")
 	defer func() { _ = ln.Close() }()
 
-	// Change the registry host to another host which is not localhost.
-	// This is required because Docker enforces HTTP if the registry
-	// host is localhost/127.0.0.1.
+	// Use localhost for HTTP tests and helm-test-registry for TLS tests.
+	// TLS tests need a different hostname to match the certificate.
 	port := ln.Addr().(*net.TCPAddr).Port
-	suite.DockerRegistryHost = fmt.Sprintf("helm-test-registry:%d", port)
+	if tlsEnabled {
+		suite.DockerRegistryHost = fmt.Sprintf("helm-test-registry:%d", port)
+	} else {
+		suite.DockerRegistryHost = fmt.Sprintf("127.0.0.1:%d", port)
+	}
 
 	config.HTTP.Addr = ln.Addr().String()
 	config.HTTP.DrainTimeout = time.Duration(10) * time.Second
@@ -146,6 +149,7 @@ func setup(suite *TestRegistry, tlsEnabled, insecure bool, auth string) {
 	if auth == "token" {
 		ln, err := net.Listen("tcp", "127.0.0.1:0")
 		suite.Nil(err, "no error finding free port for test auth server")
+		defer ln.Close()
 
 		//set test auth server host
 		suite.AuthServerHost = ln.Addr().String()