### Question:
BasicStatisticResult implements RankingResult { public boolean equals(Object obj) { if (this == obj) { return true; } if (obj == null) { return false; } if (getClass() != obj.getClass()) { return false; } BasicStatisticResult other = (BasicStatisticResult) obj; return this.result.equals(other.getResult()); } BasicStatisticResult();  BasicStatisticResult(BasicStatistic result); BasicStatistic getResult(); void setResult(BasicStatistic result); ColumnCombination getColumnCombination(); void setStatisticName2Value(HashMap<String, BasicStatisticValue> statisticName2Value); Map<String, BasicStatisticValue> getStatisticMap(); void setTableName(String tableName); String getTableName(); float getColumnRatio(); void setColumnRatio(float columnRatio); float getOccurrenceRatio(); void setOccurrenceRatio(float occurrenceRatio); float getUniquenessRatio(); void setUniquenessRatio(float uniquenessRatio); boolean equals(Object obj); @Override int hashCode();  }### Answer:
@Test public void testEquals() throws InputGenerationException, InputIterationException { BasicStatisticValueString statisticValue = new BasicStatisticValueString("value"); String statisticName = "name"; ColumnIdentifier columnIdentifier1 = new ColumnIdentifier("table", "column1"); ColumnIdentifier columnIdentifier2 = new ColumnIdentifier("table", "column2"); BasicStatistic result1 = new BasicStatistic( columnIdentifier1); result1.addStatistic(statisticName, statisticValue); BasicStatistic result2 = new BasicStatistic( columnIdentifier2); result2.addStatistic(statisticName, statisticValue); BasicStatisticResult rankingResult1 = new BasicStatisticResult(result1); BasicStatisticResult rankingResult2 = new BasicStatisticResult(result2); assertEquals(rankingResult1, rankingResult1); assertNotEquals(rankingResult1, rankingResult2); }