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diff --git a/common/transaction/driver.cxx b/common/transaction/driver.cxx
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+// file      : common/transaction/driver.cxx
+// author    : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test transaction operations.
+//
+
+#include <string>
+#include <cassert>
+#include <iostream>
+
+#include <odb/tracer.hxx>
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+#include <odb/exceptions.hxx>
+
+#include <common/common.hxx>
+#include <common/concrete.hxx>
+
+using namespace std;
+using namespace odb::core;
+
+struct transaction_tracer: odb::tracer
+{
+  virtual void
+  execute (connection&, const char* s)
+  {
+    string str (s);
+
+    if (str == "BEGIN")
+      cout << "begin transaction" << endl;
+    else if (str == "COMMIT")
+      cout << "commit transaction" << endl;
+    else if (str == "ROLLBACK")
+      cout << "rollback transaction" << endl;
+  }
+};
+
+int
+main (int argc, char* argv[])
+{
+  transaction_tracer tracer;
+  auto_ptr<database> db (create_database (argc, argv, false));
+  db->tracer (tracer);
+
+  assert (!transaction::has_current ());
+
+  // Current and db accessors.
+  //
+  cout << "test 001" << endl;
+  {
+    transaction t (db->begin ());
+    assert (&t.database () == db.get ());
+    assert (transaction::has_current ());
+    assert (&transaction::current () == &t);
+
+    transaction::reset_current ();
+    assert (!transaction::has_current ());
+
+    transaction t2 (db->begin (), false);
+    assert (!transaction::has_current ());
+
+    transaction::current (t2);
+    assert (&transaction::current () == &t2);
+  }
+
+  // Commit.
+  //
+  cout << "test 002" << endl;
+  {
+    transaction t (db->begin ());
+    t.commit ();
+  }
+
+  // Rollback.
+  //
+  cout << "test 003" << endl;
+  {
+    transaction t (db->begin ());
+    t.rollback ();
+  }
+
+  // Auto rollback.
+  //
+  cout << "test 004" << endl;
+  {
+    transaction t (db->begin ());
+  }
+
+  // Nested transaction.
+  //
+  cout << "test 005" << endl;
+  {
+    transaction t (db->begin ());
+
+    try
+    {
+      transaction n (db->begin ());
+    }
+    catch (const already_in_transaction&)
+    {
+      cout << "already_in_transaction" << endl;
+    }
+  }
+
+  // Concrete transaction type.
+  //
+  cout << "test 006" << endl;
+  {
+    assert (sizeof (odb_db::transaction) == sizeof (transaction));
+
+    odb_db::transaction t (static_cast<odb_db::database&> (*db).begin ());
+    odb_db::transaction& r (odb_db::transaction::current ());
+    assert (&t == &r);
+  }
+}