merged from gramsrv upstream

internal/store/postgres/blob_test_helpers_test.go

@@ -0,0 +1,25 @@
+package postgres
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+
+	"telesrv/internal/domain"
+)
+
+func postgresTestBlob(locationKey, label string, size int64, mimeType string) domain.FileBlob {
+	data := make([]byte, size)
+	seed := sha256.Sum256([]byte(label))
+	for i := range data {
+		data[i] = seed[i%len(seed)]
+	}
+	digest := sha256.Sum256(data)
+	return domain.FileBlob{
+		LocationKey: locationKey,
+		Backend:     domain.MediaBackendLocalFS,
+		ObjectKey:   hex.EncodeToString(digest[:]),
+		Size:        size,
+		SHA256:      append([]byte(nil), digest[:]...),
+		MimeType:    mimeType,
+	}
+}