TestCalculateGraphMetrics()
{
// Empty directed graph.
Boolean bIsDirected = true;
CreateGraph(bIsDirected);
MetricDouble oMetricDouble;
bool rv = m_oReciprocatedVertexPairRatioCalculator.TryCalculateGraphMetrics(m_oGraph, null, out oMetricDouble);
Assert.AreEqual(true, rv);
Assert.AreEqual(0, oMetricDouble.Count);
}