testing current java timestamp in junit

Question

I'm trying to write a Junit for testing an object that has the current timestamp. the problem is when I first create the current timestamp as the following:

Date date = new Date();
Timestamp timestamp = new Timestamp(date.getTime());

It creates a timestamp object with current time including the milliseconds. so when I run my tests they're never equal because there is some time elapsed in milliseconds between the time I created the timestamp object and the time of testing:

x.setTimeToMyMethod(timestamp);
assertEquals(timestamp, x.getTimeFromMyMethod());

I tried to use SimpleDateFormat but it converts the time to a string and my setter method only accept Timestamp objects. Is there anyway that I can overcome this problem? Thanks in advance!

Thanks for the answers and here is my code and hopefully it will clarify what I'm trying to do:

public class myTest {

    Date date = new Date();

    Timestamp timestamp = new Timestamp(date.getTime());

    myTestingClass testClass = new myTestingClass();

    @BeforeClass
    public static void setUpBeforeClass() throws Exception {
    }

    @AfterClass
    public static void tearDownAfterClass() throws Exception {
    }

    @Before
    public void setUp() throws Exception {


        testClass.setCreateDate(timestamp); 

    }

    @After
    public void tearDown() throws Exception {
    }

    @Test
    public void test() {
        try {


            assertEquals(timestamp, testClass.getCreateDate());

        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }


    }

when I try to run it it gives me the following error:

java.lang.AssertionError: expected:<2015-02-11 09:09:40.038> but was:<2015-02-11 09:09:40.04>

Answer 1

您可以在测试套件中创建单个时间戳对象，将其设置为您正在通过 setter 测试的类，并在测试套件上验证它。在本例中，两者是相同的实例。