fix(auth): add internal opt to skip validation on transports (#9999)

Updates: #9823

auth/grpctransport/grpctransport.go

@@ -96,6 +96,9 @@ func (o *Options) validate() error {
 	if o == nil {
 		return errors.New("grpctransport: opts required to be non-nil")
 	}
+	if o.InternalOptions != nil && o.InternalOptions.SkipValidation {
+		return nil
+	}
 	hasCreds := o.Credentials != nil ||
 		(o.DetectOpts != nil && len(o.DetectOpts.CredentialsJSON) > 0) ||
 		(o.DetectOpts != nil && o.DetectOpts.CredentialsFile != "")
@@ -151,6 +154,9 @@ type InternalOptions struct {
 	// DefaultScopes specifies the default OAuth2 scopes to be used for a
 	// service.
 	DefaultScopes []string
+	// SkipValidation bypasses validation on Options. It should only be used
+	// internally for clients that needs more control over their transport.
+	SkipValidation bool
 }
 
 // Dial returns a GRPCClientConnPool that can be used to communicate with a

auth/grpctransport/grpctransport_test.go

@@ -117,6 +117,27 @@ func TestDial_FailsValidation(t *testing.T) {
 	}
 }
 
+func TestDial_SkipValidation(t *testing.T) {
+	opts := &Options{
+		DisableAuthentication: true,
+		Credentials: auth.NewCredentials(&auth.CredentialsOptions{
+			TokenProvider: &staticTP{tok: &auth.Token{Value: "fakeToken"}},
+		}),
+	}
+	t.Run("invalid opts", func(t *testing.T) {
+		if err := opts.validate(); err == nil {
+			t.Fatalf("opts.validate() = nil, want error")
+		}
+	})
+
+	t.Run("skip invalid opts", func(t *testing.T) {
+		opts.InternalOptions = &InternalOptions{SkipValidation: true}
+		if err := opts.validate(); err != nil {
+			t.Fatalf("opts.validate() = %v, want nil", err)
+		}
+	})
+}
+
 func TestOptions_ResolveDetectOptions(t *testing.T) {
 	tests := []struct {
 		name string

auth/httptransport/httptransport.go

@@ -74,6 +74,9 @@ func (o *Options) validate() error {
 	if o == nil {
 		return errors.New("httptransport: opts required to be non-nil")
 	}
+	if o.InternalOptions != nil && o.InternalOptions.SkipValidation {
+		return nil
+	}
 	hasCreds := o.APIKey != "" ||
 		o.Credentials != nil ||
 		(o.DetectOpts != nil && len(o.DetectOpts.CredentialsJSON) > 0) ||
@@ -131,6 +134,9 @@ type InternalOptions struct {
 	// DefaultScopes specifies the default OAuth2 scopes to be used for a
 	// service.
 	DefaultScopes []string
+	// SkipValidation bypasses validation on Options. It should only be used
+	// internally for clients that needs more control over their transport.
+	SkipValidation bool
 }
 
 // AddAuthorizationMiddleware adds a middleware to the provided client's

auth/httptransport/httptransport_test.go

@@ -133,6 +133,27 @@ func TestNewClient_FailsValidation(t *testing.T) {
 	}
 }
 
+func TestDial_SkipValidation(t *testing.T) {
+	opts := &Options{
+		DisableAuthentication: true,
+		Credentials: auth.NewCredentials(&auth.CredentialsOptions{
+			TokenProvider: staticTP("fakeToken"),
+		}),
+	}
+	t.Run("invalid opts", func(t *testing.T) {
+		if err := opts.validate(); err == nil {
+			t.Fatalf("opts.validate() = nil, want error")
+		}
+	})
+
+	t.Run("skip invalid opts", func(t *testing.T) {
+		opts.InternalOptions = &InternalOptions{SkipValidation: true}
+		if err := opts.validate(); err != nil {
+			t.Fatalf("opts.validate() = %v, want nil", err)
+		}
+	})
+}
+
 func TestOptions_ResolveDetectOptions(t *testing.T) {
 	tests := []struct {
 		name string