### Question:
ColumnInformation { protected boolean isDateValue(String value) { String[] dateFormats = {"M/dd/yyyy", "dd.M.yyyy", "M/dd/yyyy hh:mm:ss a", "dd.M.yyyy hh:mm:ss a", "dd.MMM.yyyy", "dd-MMM-yyyy"}; for (String dateFormat : dateFormats) { if (this.isDateValid(value, dateFormat)) { return true; } } return false; } ColumnInformation(String columnName, int columnIndex, BitSet bitSet);  ColumnInformation(String columnName, int columnIndex, BitSet bitSet,
                           RelationalInput relationalInput, boolean useDataDependentStatistics); boolean isUniqueColumn(); double getUniquenessRate(); double getNullRate(); long getInformationContent(long rows); String getColumnName(); long getDistinctValuesCount(); long getNullValuesCount(); ColumnType getColumnType(); Histogram getHistogram(); long getRowCount(); float getAverageValueLength(); BitSet getBitSet(); int getColumnIndex();  }### Answer:
@Test public void testIsDateValue() throws InputIterationException { ColumnInformation columnInformation = new ColumnInformation(this.columnName, this.columnIndex, new BitSet(), null, false); String trueDate = "12.12.2001"; String falseDate = "12121212"; boolean isValid = columnInformation.isDateValue(trueDate); assertTrue(isValid); isValid = columnInformation.isDateValue(falseDate); assertFalse(isValid); }