userfront&backend test coverage 추가

backend/internal/validator/schema_validator_test.go

@@ -2,13 +2,15 @@ package validator
 
 import (
 	"baron-sso-backend/internal/domain"
+	"errors"
 	"net/http"
 	"testing"
 )
 
 // MockProvider는 IdentityProvider 인터페이스를 구현하는 테스트용 구조체입니다.
 type MockProvider struct {
-	Supported []string
+	Supported   []string
+	MetadataErr error
 }
 
 func (m *MockProvider) Name() string {
@@ -16,6 +18,9 @@ func (m *MockProvider) Name() string {
 }
 
 func (m *MockProvider) GetMetadata() (*domain.IDPMetadata, error) {
+	if m.MetadataErr != nil {
+		return nil, m.MetadataErr
+	}
 	return &domain.IDPMetadata{
 		SupportedFields: m.Supported,
 	}, nil
@@ -118,3 +123,23 @@ func TestValidateIDPCompatibility(t *testing.T) {
 		})
 	}
 }
+
+func TestValidateIDPCompatibilityMetadataError(t *testing.T) {
+	mockIDP := &MockProvider{MetadataErr: errors.New("metadata unavailable")}
+
+	err := ValidateIDPCompatibility(domain.BrokerUser{}, mockIDP)
+	if err == nil {
+		t.Fatalf("expected metadata error")
+	}
+	if got := err.Error(); got != "failed to fetch metadata from IDP MockIDP: metadata unavailable" {
+		t.Fatalf("unexpected error: %s", got)
+	}
+}
+
+func TestValidateIDPCompatibilityPointerModel(t *testing.T) {
+	mockIDP := &MockProvider{Supported: []string{"id", "email", "grade", "department"}}
+
+	if err := ValidateIDPCompatibility(&domain.BrokerUser{}, mockIDP); err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+}