chore(query): add more snapshot/segment serde tests (#16273)

* meta-test

* update

* chore(query): add tests to cover snapshot and segment serde

Author: sundy-li

src/query/service/tests/it/storages/fuse/meta/c_seg_v4.mpk

@@ -112,6 +112,21 @@ fn test_snapshot_v1_to_v4() {
 
 #[test]
 fn test_snapshot_reader() {
-    let meta = include_bytes!("legacy_tpch_v4.mpk");
-    TableSnapshot::from_slice(meta).unwrap();
+    for data in [
+        include_bytes!("legacy_tpch_v4.mpk").as_slice(),
+        include_bytes!("c_sn_v4.mpk").as_slice(),
+    ] {
+        let sn = TableSnapshot::from_slice(data).unwrap();
+        assert!(sn.schema.num_fields() > 0);
+        assert!(!sn.segments.is_empty());
+        assert_eq!(sn.summary.col_stats.len(), sn.schema.num_fields());
+    }
+}
+
+#[test]
+fn test_seg_reader() {
+    let meta = include_bytes!("c_seg_v4.mpk");
+    let seg = databend_storages_common_table_meta::meta::SegmentInfo::from_slice(meta).unwrap();
+    assert!(!seg.summary.col_stats.is_empty());
+    assert!(!seg.blocks.is_empty());
 }