fix: should not use snapshot importing when it's inside a batch importing (#436)

* fix: should not use snapshot importing when it's inside a batch importing

* chore: bk

.changeset/strong-walls-vanish.md

@@ -0,0 +1,6 @@
+---
+"loro-wasm": patch
+"loro-crdt": patch
+---
+
+Fix batch importing with snapshot

crates/loro-internal/src/loro.rs

@@ -216,7 +216,12 @@ impl LoroDoc {
     /// Is the document empty? (no ops)
     #[inline(always)]
     pub fn can_reset_with_snapshot(&self) -> bool {
-        self.oplog.lock().unwrap().is_empty() && self.state.lock().unwrap().is_empty()
+        let oplog = self.oplog.lock().unwrap();
+        if oplog.batch_importing {
+            return false;
+        }
+
+        oplog.is_empty() && self.state.lock().unwrap().is_empty()
     }
 
     /// Whether [OpLog] and [DocState] are detached.

crates/loro/src/lib.rs

@@ -213,7 +213,7 @@ impl LoroDoc {
     /// Import a batch of updates/snapshot.
     ///
     /// The data can be in arbitrary order. The import result will be the same.
-    pub fn import_batch(&mut self, bytes: &[Vec<u8>]) -> LoroResult<()> {
+    pub fn import_batch(&self, bytes: &[Vec<u8>]) -> LoroResult<()> {
         self.doc.import_batch(bytes)
     }
 

crates/loro/tests/issue.rs

@@ -0,0 +1,14 @@
+use loro::LoroDoc;
+
+#[ctor::ctor]
+fn init() {
+    dev_utils::setup_test_log();
+}
+
+#[test]
+fn issue_0() {
+    let bytes = include_bytes!("./issue_0.bin");
+    let doc = LoroDoc::new();
+    doc.import_batch(&[bytes.into()]).unwrap();
+    doc.export_snapshot();
+}