From 731338f03c6d137164972264bfa279f201c1ce55 Mon Sep 17 00:00:00 2001
From: Peter Conrad <conrad@quisquis.de>
Date: Sun, 6 Aug 2017 18:59:31 +0200
Subject: [PATCH] Added test case for broken merge on empty undo_db

---
 tests/tests/database_tests.cpp | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/tests/tests/database_tests.cpp b/tests/tests/database_tests.cpp
index 5dc35f27..0e2f1295 100644
--- a/tests/tests/database_tests.cpp
+++ b/tests/tests/database_tests.cpp
@@ -59,3 +59,22 @@ BOOST_AUTO_TEST_CASE( undo_test )
       throw;
    }
 }
+
+BOOST_AUTO_TEST_CASE( merge_test )
+{
+   try {
+      database db;
+      auto ses = db._undo_db.start_undo_session();
+      const auto& bal_obj1 = db.create<account_balance_object>( [&]( account_balance_object& obj ){
+          obj.balance = 42;
+      });
+      ses.merge();
+
+      auto balance = db.get_balance( account_id_type(), asset_id_type() );
+      BOOST_CHECK_EQUAL( 42, balance.amount.value );
+   } catch ( const fc::exception& e )
+   {
+      edump( (e.to_detail_string()) );
+      throw;
+   }
+}