### Question:
BasicStatistic implements Result { public ColumnCombination getColumnCombination() { return columnCombination; } protected  BasicStatistic();  BasicStatistic(ColumnIdentifier... columnIdentifier);  BasicStatistic(Map<String, BasicStatisticValue> statisticMap, ColumnIdentifier... columnIdentifier); void addStatistic(String statisticName, BasicStatisticValue statisticValue); ColumnCombination getColumnCombination(); void setColumnCombination(ColumnCombination columnCombination); Map<String, BasicStatisticValue> getStatisticMap(); void setStatisticMap(Map<String, BasicStatisticValue> statisticMap); @Override @XmlTransient void sendResultTo(OmniscientResultReceiver resultReceiver); @Override String toString(); @Override int hashCode(); @Override boolean equals(Object obj); static final String NAME_COLUMN_SEPARATOR; static final String COLUMN_VALUE_SEPARATOR; static final String STATISTIC_SEPARATOR; }### Answer:
@Test public void testConstructor() { ColumnIdentifier expectedColumn = new ColumnIdentifier("table42", "column23"); ColumnCombination expectedColumnCombination = new ColumnCombination(expectedColumn); BasicStatistic statistic = new BasicStatistic(expectedColumn); assertEquals(expectedColumnCombination, statistic.getColumnCombination()); }