wip: add unit tests for auto_pairs

fixes helix-editor#992 and helix-editor#1014

helix-core/src/auto_pairs.rs

@@ -161,3 +161,22 @@ fn handle_same(_doc: &Rope, _selection: &Selection, _token: char) -> Option<Tran
     //}
     None
 }
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_insert() {
+        let doc = Rope::new();
+        let sel = Selection::single(0, 0);
+
+        let expected_trans = Some(
+            Transaction::insert(&doc, &sel, Tendril::from("()"))
+                .with_selection(Selection::single(1, 1)),
+        );
+        let actual_trans = hook(&doc, &sel, '(');
+
+        assert_eq!(expected_trans, actual_trans);
+    }
+}

helix-core/src/transaction.rs

@@ -419,7 +419,7 @@ impl ChangeSet {
 
 /// Transaction represents a single undoable unit of changes. Several changes can be grouped into
 /// a single transaction.
-#[derive(Debug, Default, Clone)]
+#[derive(Debug, Default, Clone, PartialEq, Eq)]
 pub struct Transaction {
     changes: ChangeSet,
     selection: Option<Selection>,