使用PowerMock进行单元测试，比较秒时的精度问题

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.api.mockito.PowerMockito;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;

import java.util.Date;

@RunWith(PowerMockRunner.class)
@PrepareForTest({SomeClass.class})
public class TimeTest {

    @Test
    public void testTimePrecision() {
        // 固定时间戳
        long fixedTimestamp = 1633072800000L; // 2021-10-01 12:00:00

        // 模拟 System.currentTimeMillis() 返回固定时间戳
        PowerMockito.mockStatic(System.class);
        PowerMockito.when(System.currentTimeMillis()).thenReturn(fixedTimestamp);

        // 测试代码
        SomeClass someClass = new SomeClass();
        Date date = someClass.getCurrentTime();

        // 断言
        assertEquals(new Date(fixedTimestamp), date);
    }
}

import org.joda.time.DateTime;
import org.joda.time.DateTimeZone;

public class SomeClass {
    public DateTime getCurrentTime() {
        return DateTime.now(DateTimeZone.UTC);
    }
}