test: iter lifetime

tests/tree_iter_lifetime.rs

@@ -0,0 +1,22 @@
+use lsm_tree::{UserKey, UserValue};
+use std::path::Path;
+
+fn iterrr(
+    path: &Path,
+) -> lsm_tree::Result<impl DoubleEndedIterator<Item = lsm_tree::Result<(UserKey, UserValue)>>> {
+    let tree = lsm_tree::Config::new(path).open()?;
+
+    for x in 0..100u32 {
+        let x = x.to_be_bytes();
+        tree.insert(x, x, 0);
+    }
+
+    Ok(tree.iter())
+}
+
+#[test_log::test]
+fn segment_reader_mvcc_slab() -> lsm_tree::Result<()> {
+    let folder = tempfile::tempdir().unwrap();
+    assert_eq!(100, iterrr(folder.path())?.count());
+    Ok(())
+}