### Question:
CategoricalPrediction extends Prediction { @Override public String toString() { return ':' + Arrays.toString(categoryProbabilities); } CategoricalPrediction(int[] categoryCounts);  CategoricalPrediction(double[] categoryCounts); double[] getCategoryCounts(); double[] getCategoryProbabilities(); int getMostProbableCategoryEncoding(); @Override FeatureType getFeatureType(); @Override void update(Example train); synchronized void update(int encoding, int count); @Override boolean equals(Object o); @Override int hashCode(); @Override String toString();  }### Answer:
@Test public void testToString() { int[] counts = { 0, 1, 3, 0, 4, 0 }; CategoricalPrediction prediction = new CategoricalPrediction(counts); assertEquals(":[0.0, 0.125, 0.375, 0.0, 0.5, 0.0]", prediction.toString()); }