OverlapUpdateNormalization extends RelatedTweetUpdateNormalization { @Override public double computeLeftNeighborContribution(int leftNodeDegree) { return 1.0; }  @Override double computeLeftNeighborContribution(int leftNodeDegree); @Override double computeScoreNormalization(double cooccurrence, int similarNodeDegree,
      int nodeDegree);  }
@Test public void testComputeLeftNeighborContribution() { OverlapUpdateNormalization overlapUpdateNormalization = new OverlapUpdateNormalization(); assertNotNull(overlapUpdateNormalization.computeLeftNeighborContribution(0)); assertNotEquals(0, overlapUpdateNormalization.computeLeftNeighborContribution(0)); }