♻️ Refactor synchronization service

internal/syncer/snapshot/store_test.go

@@ -0,0 +1,59 @@
+package snapshot
+
+import (
+	"context"
+	"testing"
+	"time"
+)
+
+// TestFileStoreReadWrite 验证目录树快照可以稳定往返。
+func TestFileStoreReadWrite(t *testing.T) {
+	root := t.TempDir()
+
+	documentRecord, err := NewRecord("documents", "doc-1", map[string]interface{}{
+		"uuid":       "doc-1",
+		"updated_at": time.Date(2026, 3, 29, 10, 0, 0, 0, time.UTC).Format(time.RFC3339),
+		"title":      "hello",
+	}, map[string][]byte{
+		"content.md": []byte("world"),
+	})
+	if err != nil {
+		t.Fatalf("build document record: %v", err)
+	}
+
+	themeRecord, err := NewRecord("themes", "theme-1", map[string]interface{}{
+		"uuid":       "theme-1",
+		"updated_at": time.Date(2026, 3, 29, 10, 1, 0, 0, time.UTC).Format(time.RFC3339),
+		"name":       "dark",
+	}, nil)
+	if err != nil {
+		t.Fatalf("build theme record: %v", err)
+	}
+
+	snap := New()
+	snap.Resources["documents"] = []Record{documentRecord}
+	snap.Resources["themes"] = []Record{themeRecord}
+
+	store := NewFileStore()
+	if err := store.Write(context.Background(), root, snap); err != nil {
+		t.Fatalf("write snapshot: %v", err)
+	}
+
+	loaded, err := store.Read(context.Background(), root)
+	if err != nil {
+		t.Fatalf("read snapshot: %v", err)
+	}
+
+	originalDigest, err := Digest(snap)
+	if err != nil {
+		t.Fatalf("digest original snapshot: %v", err)
+	}
+	loadedDigest, err := Digest(loaded)
+	if err != nil {
+		t.Fatalf("digest loaded snapshot: %v", err)
+	}
+
+	if originalDigest != loadedDigest {
+		t.Fatalf("expected digests to match, got %s != %s", originalDigest, loadedDigest)
+	}
+}