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diff --git a/basegfx/test/B2DPolyPolygonTest.cxx b/basegfx/test/B2DPolyPolygonTest.cxx
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+++ b/basegfx/test/B2DPolyPolygonTest.cxx
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#include <cppunit/TestAssert.h>
+#include <cppunit/TestFixture.h>
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/plugin/TestPlugIn.h>
+
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/polygon/b2dtrapezoid.hxx>
+
+#include "boxclipper.hxx"
+
+namespace basegfx
+{
+using ::basegfx2d::getRandomOrdinal;
+
+class b2dpolypolygon : public CppUnit::TestFixture
+{
+public:
+    // insert your test code here.
+    void testTrapezoidHelper()
+    {
+        B2DPolygon aPolygon;
+        // provoke the PointBlockAllocator to exercise the freeIfLast path
+        for (int i = 0; i < 16 * 10; i++)
+        {
+            B2DPoint aPoint(getRandomOrdinal(1000), getRandomOrdinal(1000));
+            aPolygon.append(aPoint);
+        }
+        // scatter some duplicate points in to stress things more.
+        for (int i = 0; i < 16 * 10; i++)
+        {
+            aPolygon.insert(getRandomOrdinal(aPolygon.count() - 1),
+                            aPolygon.getB2DPoint(getRandomOrdinal(aPolygon.count() - 1)));
+        }
+        B2DPolygon aPolygonOffset;
+        // duplicate the polygon and offset it slightly.
+        for (size_t i = 0; i < aPolygon.count(); i++)
+        {
+            B2DPoint aPoint(aPolygon.getB2DPoint(i));
+            aPoint += B2DPoint(0.5 - getRandomOrdinal(1), 0.5 - getRandomOrdinal(1));
+            aPolygonOffset.append(aPoint);
+        }
+        B2DPolyPolygon aPolyPolygon;
+        aPolyPolygon.append(aPolygon);
+        aPolyPolygon.append(aPolygonOffset);
+        B2DTrapezoidVector aVector;
+        basegfx::utils::trapezoidSubdivide(aVector, aPolyPolygon);
+        CPPUNIT_ASSERT_MESSAGE("more than zero sub-divided trapezoids", !aVector.empty());
+    }
+
+    // Change the following lines only, if you add, remove or rename
+    // member functions of the current class,
+    // because these macros are need by auto register mechanism.
+
+    CPPUNIT_TEST_SUITE(b2dpolypolygon);
+    CPPUNIT_TEST(testTrapezoidHelper);
+    CPPUNIT_TEST_SUITE_END();
+}; // class b2dpolypolygon
+
+} // namespace basegfx
+
+CPPUNIT_TEST_SUITE_REGISTRATION(basegfx::b2dpolypolygon);
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */