@Test
public void evaluateRegression() {

    Map<String, Object> input = new HashMap<>();
    input.put("a", 24);
    input.put("b", 32);
    Object retrieved = classificationTable.evaluateRegression(input);
    assertEquals(expectedResult, retrieved);
    final Map<String, Object> outputFieldsMap = classificationTable.getOutputFieldsMap();
    double expectedDouble = FIRST_ITEM_OPERATOR.applyAsDouble(firstTableResult);
    assertEquals(expectedDouble, outputFieldsMap.get(PROBABILITY_FALSE));
    expectedDouble = SECOND_ITEM_OPERATOR.applyAsDouble(expectedDouble);
    assertEquals(expectedDouble, outputFieldsMap.get(PROBABILITY_TRUE));
}