refac: atomic merge, lost-update race, RunPurge cost, duplicated walks

test/media_cleanup_test.go

@@ -2,7 +2,6 @@ package test
 
 import (
 	domainArticle "RenewCMS/internal/domain/article"
-	"RenewCMS/internal/infrastructure/useCases"
 	"reflect"
 	"testing"
 )
@@ -25,7 +24,7 @@ func TestMediaMergeRewritesArticlesInIdOrder(t *testing.T) {
 		env.seedArticle(id, "Article", true, env.urlOf(3))
 	}
 	recorder := &mediaOrderRecordingArticleRepo{mockArticleRepo: env.articles}
-	uc := useCases.NewMergeMediaUseCase(env.images, recorder, env.storage, newMockVariantFileRepo(), discardRecorder, plainSites(), plainAuthors(), newMockContentTypeRepo(), newMockEntryRepo())
+	uc := newTestMergeMedia(env.images, recorder, env.storage, newMockVariantFileRepo(), discardRecorder, plainSites(), plainAuthors(), newMockContentTypeRepo(), newMockEntryRepo())
 
 	if _, err := uc.Merge(testCtx, 2, []uint32{3}); err != nil {
 		t.Fatalf("unexpected error: %v", err)