make B2DPolyPolygonTest deterministic

Change-Id: Ia8071285d70b39b21b1312d461dc8d502d5cb305
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/147497
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

1 files changed, 10 insertions, 2 deletions

diff --git a/basegfx/test/B2DPolyPolygonTest.cxx b/basegfx/test/B2DPolyPolygonTest.cxx
index 1fef45328357..f51d396b8578 100644
--- a/basegfx/test/B2DPolyPolygonTest.cxx
+++ b/basegfx/test/B2DPolyPolygonTest.cxx
@@ -25,11 +25,10 @@
 #include <basegfx/polygon/b2dtrapezoid.hxx>
 
 #include "boxclipper.hxx"
+#include <random>
 
 namespace basegfx
 {
-using ::basegfx2d::getRandomOrdinal;
-
 class b2dpolypolygon : public CppUnit::TestFixture
 {
 public:
@@ -65,6 +64,15 @@ public:
         CPPUNIT_ASSERT_MESSAGE("more than zero sub-divided trapezoids", !aVector.empty());
     }
 
+    std::mt19937 rng; // Standard mersenne_twister_engine
+
+    /// Gets a random ordinal [0,n)
+    ::std::size_t getRandomOrdinal(const ::std::size_t n)
+    {
+        std::uniform_int_distribution<size_t> dist(0, n - 1);
+        return dist(rng);
+    }
+
     // 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.