Add support for change-tracking containers

ODB now supports "smart" ordered containers. Such containers get extra
functions for updating and deleting individual elements. Based on this
functionality implement two change-tracking containers: odb::vector
(equivalent to std::vector) and QOdbList (equivalent to QList). New
tests: common/container/change-tracking and qt/common/container/change-
tracking.

4 files changed, 890 insertions, 0 deletions

diff --git a/common/container/change-tracking/driver.cxx b/common/container/change-tracking/driver.cxx
new file mode 100644
index 0000000..98d711c
--- /dev/null
+++ b/common/container/change-tracking/driver.cxx
@@ -0,0 +1,694 @@
+// file      : common/container/change-tracking/driver.cxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+// Test change-tracking containers.
+//
+
+#include <common/config.hxx> // HAVE_CXX11
+
+#include <memory>   // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#ifdef HAVE_CXX11
+#  include <utility> // std::move
+#endif
+
+#include <odb/tracer.hxx>
+#include <odb/session.hxx>
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include <common/common.hxx>
+
+#include "test.hxx"
+#include "test-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+struct counting_tracer: odb::tracer
+{
+  void
+  reset (transaction& tr) {u = i = d = s = t = 0; tr.tracer (*this);}
+
+  virtual void
+  execute (odb::connection&, const char* stmt)
+  {
+    string p (stmt, 6);
+    if (p == "UPDATE")
+      u++;
+    else if (p == "INSERT")
+      i++;
+    else if (p == "DELETE")
+      d++;
+    else if (p == "SELECT")
+      s++;
+    t++;
+  }
+
+  size_t u, i, d, s, t;
+};
+
+static counting_tracer tr;
+
+// Compilation test: instantiate all the functions. In C++11 mode only
+// do this if we have a fairly conforming compiler that implements the
+// complete std::vector interface.
+//
+
+#if defined (HAVE_CXX11)
+#if defined (__GNUC__) && __GNUC__ >= 4 && __GNUC_MINOR__ >= 7
+struct item {};
+template class odb::vector<item>;
+template class odb::vector_iterator<odb::vector<item>,
+                                    std::vector<item>::iterator>;
+template class odb::vector_iterator<odb::vector<item>,
+                               std::vector<item>::reverse_iterator>;
+#endif
+#endif
+
+void
+f (const std::vector<int>&) {}
+
+int
+main (int argc, char* argv[])
+{
+  try
+  {
+    // Test extended interface.
+    //
+    {
+      typedef odb::vector<int> vector;
+
+      vector ov;
+      std::vector<int> sv;
+      f (ov);               // Implicit conversion to std::vector.
+      vector ov1 (sv);      // Initialization from std::vector.
+      ov = sv;              // Assignement from std::vector.
+
+      // Container comparison.
+      //
+      if (ov != ov1 ||
+          ov != sv  ||
+          sv != ov1)
+        ov.clear ();
+
+      // Iterator comparison/conversion.
+      //
+      vector::const_iterator i (ov.begin ());
+      if (i != ov.end ())
+        i = ov.end ();
+
+      vector::const_reverse_iterator j (ov.rbegin ());
+      if (j != ov.rend ())
+        j = ov.rend ();
+    }
+
+    auto_ptr<database> db (create_database (argc, argv));
+
+    // Test traits logic.
+    //
+    {
+      object o ("1");
+      o.i = 123;
+      o.s.push_back ("a");
+
+      assert (!o.s._tracking ());
+
+      // persist
+      //
+      {
+        transaction t (db->begin ());
+        db->persist (o);
+        t.commit ();
+      }
+
+      assert (o.s._tracking ());
+
+      // load
+      //
+      {
+        transaction t (db->begin ());
+        auto_ptr<object> p (db->load<object> ("1"));
+        assert (p->s._tracking ());
+        t.commit ();
+      }
+
+      // update
+      //
+      {
+        transaction t (db->begin ());
+        db->update (o);
+        t.commit ();
+      }
+
+      assert (o.s._tracking ());
+
+      // erase
+      //
+      {
+        transaction t (db->begin ());
+        db->erase (o);
+        t.commit ();
+      }
+
+      assert (!o.s._tracking ());
+    }
+
+    // Test change tracking.
+    //
+    object o ("1");
+    o.i = 123;
+    o.s.push_back ("a");
+
+    {
+      transaction t (db->begin ());
+      db->persist (o);
+      t.commit ();
+    }
+
+    // push_back/pop_back
+    //
+    {
+      o.s.push_back ("b"); // insert
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 1 && tr.i == 1 && tr.t == 2);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.pop_back ();
+      o.s.push_back ("c"); // update
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 2 && tr.t == 2);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.pop_back ();
+      for (int i (0); i != 1024; ++i)
+        o.s.push_back ("x"); // realloc
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 2 && tr.i == 1023 && tr.t == 1025);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      for (int i (0); i != 1024; ++i)
+        o.s.pop_back (); // delete
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 1 && tr.d == 1 && tr.t == 2);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.push_back ("b");
+      o.s.pop_back (); // no-op
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 1 && tr.t == 1);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    // insert
+    //
+    {
+      o.s.clear ();
+      o.s.push_back ("a");
+      o.s.push_back ("b");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.insert (o.s.begin (), "a1"); // insert front
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 3 && tr.i == 1 && tr.t == 4);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.insert (o.s.begin () + 1, "a2"); // insert middle
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 3 && tr.i == 1 && tr.t == 4);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.insert (o.s.end (), "b1"); // insert back
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 1 && tr.i == 1 && tr.t == 2);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    // erase
+    //
+    {
+      o.s.clear ();
+      o.s.push_back ("a");
+      o.s.push_back ("b");
+      o.s.push_back ("c");
+      o.s.push_back ("d");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.erase (o.s.begin ()); // erase front
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 4 && tr.d == 1 && tr.t == 5);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.erase (o.s.begin () + 1); // erase middle
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 2 && tr.d == 1 && tr.t == 3);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.erase (o.s.end () - 1); // erase back
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 1 && tr.d == 1 && tr.t == 2);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    // modify
+    //
+    {
+      o.s.clear ();
+      o.s.push_back ("a");
+      o.s.push_back ("b");
+      o.s.push_back ("c");
+      o.s.push_back ("d");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.modify (1) += 'b';
+      o.s.modify_at (2) += 'c';
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 3 && tr.t == 3);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.modify_front () += 'a';
+      o.s.modify_back () += 'd';
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 3 && tr.t == 3);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.begin ().modify () += 'a';
+      o.s.rbegin ().modify () += 'c';
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 3 && tr.t == 3);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      (o.s.rbegin () + 1).modify (1) += 'a';
+      (o.s.rbegin () + 1).modify (-1) += 'c';
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 3 && tr.t == 3);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.mbegin ();
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 5 && tr.t == 5);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    // clear
+    //
+    {
+      o.s.clear ();
+      o.s.push_back ("a");
+      o.s.push_back ("b");
+      o.s.push_back ("c");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.clear ();
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 1 && tr.d == 1 && tr.t == 2);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    // assign
+    //
+    {
+      o.s.clear ();
+      o.s.push_back ("a");
+      o.s.push_back ("b");
+      o.s.push_back ("c");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.assign (4, "x");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 4 && tr.i == 1 && tr.t == 5);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    // resize
+    //
+    {
+      o.s.clear ();
+      o.s.push_back ("a");
+      o.s.push_back ("b");
+      o.s.push_back ("c");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.pop_back ();
+      o.s.resize (4, "x"); // expand
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 2 && tr.i == 1 && tr.t == 3);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      o.s.push_back ("y");
+      o.s.resize (3);      // shrink
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (tr.u == 1 && tr.d == 1 && tr.t == 2);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    // Transaction rollback.
+    //
+    {
+      o.s.clear ();
+      o.s.push_back ("a");
+      o.s.push_back ("b");
+      o.s.push_back ("c");
+
+      transaction t (db->begin ());
+      tr.reset (t);
+      db->update (o);
+      assert (*db->load<object> ("1") == o);
+      t.commit ();
+    }
+
+    {
+      {
+        o.s.push_back ("d");
+
+        transaction t (db->begin ());
+        db->update (o);
+        t.rollback ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (o);
+        assert (tr.u == 1 && tr.i == 4 && tr.d == 1 && tr.t == 6);
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (o);
+        assert (tr.u == 1 && tr.t == 1);
+        t.commit ();
+      }
+    }
+
+    // Armed copy.
+    //
+    {
+      auto_ptr<object> c;
+
+      {
+        o.s.pop_back ();
+
+        transaction t (db->begin ());
+        db->update (o);
+        c.reset (new object (o));
+        t.rollback ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (c);
+        assert (tr.u == 1 && tr.i == 3 && tr.d == 1 && tr.t == 5);
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (c);
+        assert (tr.u == 1 && tr.t == 1);
+        t.commit ();
+      }
+    }
+
+    // Armed swap.
+    //
+    {
+      object c (o);
+
+      {
+        o.s.push_back ("d");
+
+        transaction t (db->begin ());
+        db->update (o);
+        assert (o.s._tracking () && !c.s._tracking ());
+        c.s.swap (o.s);
+        assert (!o.s._tracking () && c.s._tracking ());
+        t.rollback ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (c);
+        assert (tr.u == 1 && tr.i == 4 && tr.d == 1 && tr.t == 6);
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (c);
+        assert (tr.u == 1 && tr.t == 1);
+        t.commit ();
+      }
+    }
+
+    // Armed move.
+    //
+#ifdef HAVE_CXX11
+    {
+      auto_ptr<object> c;
+
+      {
+        o.s.pop_back ();
+
+        transaction t (db->begin ());
+        db->update (o);
+        assert (o.s._tracking ());
+        c.reset (new object (std::move (o)));
+        assert (!o.s._tracking () && c->s._tracking ());
+        t.rollback ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (c);
+        assert (tr.u == 1 && tr.i == 2 && tr.d == 1 && tr.t == 4);
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        tr.reset (t);
+        db->update (c);
+        assert (tr.u == 1 && tr.t == 1);
+        t.commit ();
+      }
+    }
+#endif
+
+    // Test mixing "smart" and "dumb" container (specifically, erase(obj)).
+    //
+    {
+      mix_object o (1);
+      o.ov.assign (3, 123);
+      o.sv.assign (3, 123);
+
+      {
+        transaction t (db->begin ());
+        db->persist (o);
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        db->erase (o);
+        t.commit ();
+      }
+
+      {
+        transaction t (db->begin ());
+        db->persist (o);
+        t.commit ();
+      }
+    }
+
+    // Test using change tracking container as inverse member.
+    //
+    {
+      inv_object1 o1;
+      inv_object2 o2;
+      o1.o2 = &o2;
+
+      {
+        transaction t (db->begin ());
+        db->persist (o2);
+        db->persist (o1);
+        t.commit ();
+      }
+
+      assert (!o2.o1._tracking ());
+
+      {
+        session s;
+        transaction t (db->begin ());
+        auto_ptr<inv_object1> p1 (db->load<inv_object1> (o1.id_));
+        auto_ptr<inv_object2> p2 (db->load<inv_object2> (o2.id_));
+        assert (p2->o1[0] == p1.get ());
+        assert (!p2->o1._tracking ());
+        t.commit ();
+      }
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}
diff --git a/common/container/change-tracking/makefile b/common/container/change-tracking/makefile
new file mode 100644
index 0000000..ffd149c
--- /dev/null
+++ b/common/container/change-tracking/makefile
@@ -0,0 +1,115 @@
+# file      : common/container/change-tracking/makefile
+# copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+# license   : GNU GPL v2; see accompanying LICENSE file
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../../../build/bootstrap.make
+
+cxx_tun := driver.cxx
+odb_hdr := test.hxx
+cxx_obj := $(addprefix $(out_base)/,$(cxx_tun:.cxx=.o) $(odb_hdr:.hxx=-odb.o))
+cxx_od  := $(cxx_obj:.o=.o.d)
+
+common.l             := $(out_root)/libcommon/common/common.l
+common.l.cpp-options := $(out_root)/libcommon/common/common.l.cpp-options
+
+driver  := $(out_base)/driver
+dist    := $(out_base)/.dist
+test    := $(out_base)/.test
+clean   := $(out_base)/.clean
+
+# Import.
+#
+$(call import,\
+  $(scf_root)/import/odb/stub.make,\
+  odb: odb,odb-rules: odb_rules)
+
+# Build.
+#
+$(driver): $(cxx_obj) $(common.l)
+$(cxx_obj) $(cxx_od): cpp_options := -I$(out_base) -I$(src_base)
+$(cxx_obj) $(cxx_od): $(common.l.cpp-options)
+
+genf := $(addprefix $(odb_hdr:.hxx=-odb),.hxx .ixx .cxx) $(odb_hdr:.hxx=.sql)
+gen  := $(addprefix $(out_base)/,$(genf))
+
+$(gen): $(odb)
+$(gen): odb := $(odb)
+$(gen) $(dist): export odb_options += --database $(db_id) --generate-schema \
+--table-prefix t_cont_changet_
+$(gen): cpp_options := -I$(src_base)
+$(gen): $(common.l.cpp-options)
+
+$(call include-dep,$(cxx_od),$(cxx_obj),$(gen))
+
+# Alias for default target.
+#
+$(out_base)/: $(driver)
+
+# Dist
+#
+name := $(subst /,-,$(subst $(src_root)/common/,,$(src_base)))
+
+$(dist): db_id := @database@
+$(dist): sources := $(cxx_tun)
+$(dist): headers := $(odb_hdr)
+$(dist): data_dist := test.std
+$(dist): export name := $(name)
+$(dist): export extra_dist := $(data_dist) $(call vc9projs,$(name)) \
+$(call vc10projs,$(name)) $(call vc11projs,$(name))
+$(dist):
+	$(call dist-data,$(sources) $(headers) $(data_dist))
+	$(call meta-automake,../../template/Makefile.am)
+	$(call meta-vc9projs,../../template/template,$(name))
+	$(call meta-vc10projs,../../template/template,$(name))
+	$(call meta-vc11projs,../../template/template,$(name))
+
+# Test.
+#
+$(test): $(driver) $(src_base)/test.std
+	$(call schema)
+	$(call message,test $<,$< --options-file $(dcf_root)/db.options \
+>$(out_base)/test.out)
+	$(call message,,diff -u $(src_base)/test.std $(out_base)/test.out)
+	$(call message,,rm -f $(out_base)/test.out)
+
+# Clean.
+#
+$(clean):                            \
+  $(driver).o.clean                  \
+  $(addsuffix .cxx.clean,$(cxx_obj)) \
+  $(addsuffix .cxx.clean,$(cxx_od))  \
+  $(addprefix $(out_base)/,$(odb_hdr:.hxx=-odb.cxx.hxx.clean))
+	$(call message,,rm -f $(out_base)/test.out)
+
+# Generated .gitignore.
+#
+ifeq ($(out_base),$(src_base))
+$(driver): | $(out_base)/.gitignore
+
+$(out_base)/.gitignore: files := driver $(genf)
+$(clean): $(out_base)/.gitignore.clean
+
+$(call include,$(bld_root)/git/gitignore.make)
+endif
+
+# How to.
+#
+$(call include,$(bld_root)/dist.make)
+$(call include,$(bld_root)/meta/vc9proj.make)
+$(call include,$(bld_root)/meta/vc10proj.make)
+$(call include,$(bld_root)/meta/vc11proj.make)
+$(call include,$(bld_root)/meta/automake.make)
+
+$(call include,$(bld_root)/cxx/standard.make) # cxx_standard
+ifdef cxx_standard
+$(gen): odb_options += --std $(cxx_standard)
+$(call include,$(odb_rules))
+endif
+
+$(call include,$(bld_root)/cxx/cxx-d.make)
+$(call include,$(bld_root)/cxx/cxx-o.make)
+$(call include,$(bld_root)/cxx/o-e.make)
+
+# Dependencies.
+#
+$(call import,$(src_root)/libcommon/makefile)
diff --git a/common/container/change-tracking/test.hxx b/common/container/change-tracking/test.hxx
new file mode 100644
index 0000000..0387faf
--- /dev/null
+++ b/common/container/change-tracking/test.hxx
@@ -0,0 +1,81 @@
+// file      : common/container/change-tracking/test.hxx
+// copyright : Copyright (c) 2009-2012 Code Synthesis Tools CC
+// license   : GNU GPL v2; see accompanying LICENSE file
+
+#ifndef TEST_HXX
+#define TEST_HXX
+
+#include <common/config.hxx> // HAVE_CXX11
+
+#include <string>
+#include <memory>
+#include <vector>
+
+#ifdef HAVE_CXX11
+#  include <utility> // std::move
+#endif
+
+#include <odb/core.hxx>
+#include <odb/vector.hxx>
+
+#pragma db object pointer(std::auto_ptr)
+struct object
+{
+  object () {}
+  object (const std::string& id): id_ (id) {}
+
+#ifdef HAVE_CXX11
+  object (const object& x): id_ (x.id_), i (x.i), s (x.s) {}
+  object (object&& x): id_ (std::move (x.id_)), i (x.i), s (std::move (x.s)) {}
+#endif
+
+  #pragma db id
+  std::string id_;
+
+  unsigned int i;
+
+  odb::vector<std::string> s;
+
+  inline bool
+  operator== (const object& o) {return id_ == o.id_ && i == o.i && s == o.s;}
+};
+
+// Test mixing "smart" and "dumb" container (specifically, erase(obj)).
+//
+#pragma db object
+struct mix_object
+{
+  mix_object () {}
+  mix_object (unsigned long id): id_ (id) {}
+
+  #pragma db id
+  unsigned long id_;
+
+  odb::vector<int> ov;
+  std::vector<int> sv;
+};
+
+// Test using change tracking container as inverse member.
+//
+struct inv_object2;
+
+#pragma db object session
+struct inv_object1
+{
+  #pragma db id auto
+  unsigned long id_;
+
+  inv_object2* o2;
+};
+
+#pragma db object session
+struct inv_object2
+{
+  #pragma db id auto
+  unsigned long id_;
+
+  #pragma db inverse(o2)
+  odb::vector<inv_object1*> o1;
+};
+
+#endif // TEST_HXX
diff --git a/common/container/change-tracking/test.std b/common/container/change-tracking/test.std
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/common/container/change-tracking/test.std