refac: allowed image types and the size limit are a domain rule checked by the use case, not by the persistence layer

test/image_extension_mapping_test.go

@@ -0,0 +1,43 @@
+package test
+
+import (
+	imageDomain "RenewCMS/internal/domain/image"
+	"RenewCMS/internal/infrastructure/persistence/models"
+	persistence "RenewCMS/internal/infrastructure/persistence/repositories"
+	"path/filepath"
+	"reflect"
+	"strings"
+	"testing"
+)
+
+func TestImageRepositoryHasAnExtensionForEveryAllowedContentType(t *testing.T) {
+	db := openInMemoryDb(t)
+	if err := db.AutoMigrate(&models.Image{}); err != nil {
+		t.Fatalf("failed to migrate: %v", err)
+	}
+	repo := persistence.NewImageRepository(db)
+	t.Setenv("UPLOAD_DIR", t.TempDir())
+
+	allowedContentTypes := imageDomain.AllowedContentTypes()
+	expectedContentTypes := []string{"image/jpeg", "image/png", "image/svg+xml", "image/webp"}
+	if !reflect.DeepEqual(allowedContentTypes, expectedContentTypes) {
+		t.Fatalf("expected AllowedContentTypes() to be %v, got %v", expectedContentTypes, allowedContentTypes)
+	}
+
+	for _, contentType := range allowedContentTypes {
+		t.Run(contentType, func(t *testing.T) {
+			result, err := repo.Create(imageDomain.ImageInput{
+				Content:     strings.NewReader("fake-image-data"),
+				Filename:    "upload",
+				ContentType: contentType,
+			})
+			if err != nil {
+				t.Fatalf("Create failed: %v", err)
+			}
+			extension := filepath.Ext(result.Path)
+			if extension == "" {
+				t.Errorf("expected a non-empty extension for %q, got path %q", contentType, result.Path)
+			}
+		})
+	}
+}