Add a unit test checking selection updating in virtual wxListCtrl.

Verify that the selection is updated correctly after the number of items in
the control is decreased.

See #12378.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@66141 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/controls/virtlistctrltest.cpp

@@ -0,0 +1,92 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        tests/controls/virtlistctrltest.cpp
+// Purpose:     wxListCtrl unit tests for virtual mode
+// Author:      Vadim Zeitlin
+// Created:     2010-11-13
+// RCS-ID:      $Id$
+// Copyright:   (c) 2010 Vadim Zeitlin <vadim@wxwidgets.org>
+///////////////////////////////////////////////////////////////////////////////
+
+// ----------------------------------------------------------------------------
+// headers
+// ----------------------------------------------------------------------------
+
+#include "testprec.h"
+
+#if wxUSE_LISTCTRL
+
+#ifdef __BORLANDC__
+    #pragma hdrstop
+#endif
+
+#ifndef WX_PRECOMP
+    #include "wx/app.h"
+#endif // WX_PRECOMP
+
+#include "wx/listctrl.h"
+
+// ----------------------------------------------------------------------------
+// test class
+// ----------------------------------------------------------------------------
+
+class VirtListCtrlTestCase : public CppUnit::TestCase
+{
+public:
+    VirtListCtrlTestCase() { }
+
+    virtual void setUp();
+    virtual void tearDown();
+
+private:
+    CPPUNIT_TEST_SUITE( VirtListCtrlTestCase );
+        CPPUNIT_TEST( UpdateSelection );
+    CPPUNIT_TEST_SUITE_END();
+
+    void UpdateSelection();
+
+    wxListCtrl *m_list;
+
+    wxDECLARE_NO_COPY_CLASS(VirtListCtrlTestCase);
+};
+
+// register in the unnamed registry so that these tests are run by default
+CPPUNIT_TEST_SUITE_REGISTRATION( VirtListCtrlTestCase );
+
+// also include in it's own registry so that these tests can be run alone
+CPPUNIT_TEST_SUITE_NAMED_REGISTRATION( VirtListCtrlTestCase, "VirtListCtrlTestCase" );
+
+// ----------------------------------------------------------------------------
+// test initialization
+// ----------------------------------------------------------------------------
+
+void VirtListCtrlTestCase::setUp()
+{
+    m_list = new wxListCtrl(wxTheApp->GetTopWindow(), wxID_ANY,
+                            wxPoint(0, 0), wxSize(400, 200),
+                            wxLC_REPORT | wxLC_VIRTUAL);
+}
+
+void VirtListCtrlTestCase::tearDown()
+{
+    delete m_list;
+    m_list = NULL;
+}
+
+void VirtListCtrlTestCase::UpdateSelection()
+{
+    m_list->SetItemCount(10);
+    CPPUNIT_ASSERT_EQUAL( 0, m_list->GetSelectedItemCount() );
+
+    m_list->SetItemState(7, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED);
+    CPPUNIT_ASSERT_EQUAL( 1, m_list->GetSelectedItemCount() );
+
+    m_list->SetItemState(0, wxLIST_STATE_SELECTED, wxLIST_STATE_SELECTED);
+    CPPUNIT_ASSERT_EQUAL( 2, m_list->GetSelectedItemCount() );
+
+    // The item 7 is now invalid and so shouldn't be counted as selected any
+    // more.
+    m_list->SetItemCount(5);
+    CPPUNIT_ASSERT_EQUAL( 1, m_list->GetSelectedItemCount() );
+}
+
+#endif // wxUSE_LISTCTRL