如何使用Java对自定义日期反序列化程序进行单元测试

import com.fasterxml.jackson.core.JsonParser;
import com.fasterxml.jackson.databind.DeserializationContext;
import com.fasterxml.jackson.databind.JsonDeserializer;
import java.io.IOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class CustomDateDeserializer extends JsonDeserializer<Date> {
    private static final SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd");

    @Override
    public Date deserialize(JsonParser jsonParser, DeserializationContext deserializationContext) throws IOException {
        String dateStr = jsonParser.getText();
        try {
            return dateFormat.parse(dateStr);
        } catch (ParseException e) {
            throw new RuntimeException(e);
        }
    }
}

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.module.SimpleModule;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;

import java.util.Date;

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

public class CustomDateDeserializerTest {

    private ObjectMapper objectMapper;

    @BeforeEach
    public void setUp() {
        objectMapper = new ObjectMapper();
        SimpleModule module = new SimpleModule();
        module.addDeserializer(Date.class, new CustomDateDeserializer());
        objectMapper.registerModule(module);
    }

    @Test
    public void testCustomDateDeserializer() throws Exception {
        String dateJson = "\"2023-04-30\"";
        Date expectedDate = new SimpleDateFormat("yyyy-MM-dd").parse("2023-04-30");

        Date actualDate = objectMapper.readValue(dateJson, Date.class);

        assertEquals(expectedDate, actualDate);
    }
}