BigDecimal Scale 2 && RoundingMode.HALF_UP Hibernate Converter

BigDecimalConverter.java

package com.maoudia;

import java.math.BigDecimal;
import java.math.RoundingMode;

import jakarta.persistence.AttributeConverter;
import jakarta.persistence.Converter;

@Converter(autoApply = true)
public class BigDecimalConverter implements AttributeConverter<BigDecimal, BigDecimal> {

    @Override
    public BigDecimal convertToDatabaseColumn(BigDecimal attribute) {
        if (attribute == null) {
            return null;
        }

        return attribute.setScale(2, RoundingMode.HALF_UP);
    }

    @Override
    public BigDecimal convertToEntityAttribute(BigDecimal dbData) {
        if (dbData.scale() == 2) {
            return dbData;
        } else {
            return dbData.setScale(2, RoundingMode.HALF_UP);
        }
    }

}

BigDecimalConverterTest.java

package com.maoudia;

import org.junit.jupiter.api.Test;
import java.math.BigDecimal;
import java.math.RoundingMode;

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNull;

public class BigDecimalConverterTest {

    private final BigDecimalConverter converter = new BigDecimalConverter();

    @Test
    public void testConvertToDatabaseColumn() {
        assertNull(converter.convertToDatabaseColumn(null));
        assertEquals(new BigDecimal("123.46"), converter.convertToDatabaseColumn(new BigDecimal("123.456")));
        assertEquals(new BigDecimal("123.46"), converter.convertToDatabaseColumn(new BigDecimal("123.464")));
        assertEquals(new BigDecimal("123.46"), converter.convertToDatabaseColumn(new BigDecimal("123.46")));
        assertEquals(new BigDecimal("123.47"), converter.convertToDatabaseColumn(new BigDecimal("123.465")));
    }

    @Test
    public void testConvertToEntityAttribute() {
        assertEquals(new BigDecimal("123.46"), converter.convertToEntityAttribute(new BigDecimal("123.456")));
        assertEquals(new BigDecimal("123.46"), converter.convertToEntityAttribute(new BigDecimal("123.464")));
        assertEquals(new BigDecimal("123.46"), converter.convertToEntityAttribute(new BigDecimal("123.46")));
        assertEquals(new BigDecimal("123.47"), converter.convertToEntityAttribute(new BigDecimal("123.465")));
    }
}