### Question:
LongConverter implements AtlasConverter<Long> { @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.LONG) public Long toLong(Long value) { return value != null ? new Long(value) : null; }  @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DECIMAL) BigDecimal toBigDecimal(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.BIG_INTEGER) BigInteger toBigInteger(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.BOOLEAN, concerns = AtlasConversionConcern.CONVENTION) Boolean toBoolean(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.BYTE, concerns = AtlasConversionConcern.RANGE) Byte toByte(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.CHAR, concerns = { AtlasConversionConcern.RANGE, AtlasConversionConcern.CONVENTION }) Character toCharacter(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE_TIME_TZ) Date toDate(Long date); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DOUBLE) Double toDouble(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.FLOAT) Float toFloat(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.INTEGER, concerns = AtlasConversionConcern.RANGE) Integer toInteger(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE) LocalDate toLocalDate(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.TIME) LocalTime toLocalTime(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE_TIME) LocalDateTime toLocalDateTime(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.LONG) Long toLong(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.SHORT, concerns = AtlasConversionConcern.RANGE) Short toShort(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.NUMBER) Number toNumber(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.STRING) String toString(Long value); @AtlasConversionInfo(sourceType = FieldType.LONG, targetType = FieldType.DATE_TIME_TZ) ZonedDateTime toZonedDateTime(Long value);  }### Answer:
@Test public void convertToLong() { Long l = 1L; Long d = converter.toLong(l); assertNotNull(d); assertNotSame(l, d); assertEquals(1L, d, 0.0); }
@Test public void convertToLongNull() { Long l = null; Long d = converter.toLong(l); assertNull(d); }