Example of concurrency bug

examples/conflict.rs

@@ -0,0 +1,30 @@
+use persy_trees::{Db, Tree};
+
+fn main() -> Result<(), Box<dyn std::error::Error>> {
+    let db = Db::open("./db.persy")?;
+
+    let tree: Tree<String, u8> = db.open_tree("u8-tree")?;
+
+    let mut tx = tree.transaction()?;
+    tx.insert("value".into(), 5)?;
+    tx.commit()?;
+
+    let mut tx1 = tree.transaction()?;
+    let mut tx2 = tree.transaction()?;
+
+    let value1 = tx1.get(&"value".into())?.expect("Value exists");
+    let value2 = tx2.get(&"value".into())?.expect("Value exists");
+
+    tx1.insert("value".into(), value1 + 1)?;
+    tx2.insert("value".into(), value2 - 1)?;
+
+    tx1.commit()?;
+    tx2.commit()?;
+
+    let mut tx = tree.transaction()?;
+    let value = tx.get(&"value".into())?.expect("Value exists");
+
+    println!("value: {}", value);
+
+    Ok(())
+}