Mockito ArgumentCaptor用于可选参数

Question

Have a method in accountHandler class with following signature

public void processMessage(String accountId, 
Metrics metrics, 
Optional<ZonedDateTime> parsedDatetime) {

        // do something 
}

In the test, if I want to use argument captor, how do I define it?

Tried the following and it didn't work as expected.

ArgumentCaptor<ZonedDateTime> timeCaptor = ArgumentCaptor.forClass(ZonedDateTime.class);

What is the syntax to make this optional with argcaptor?

Answer 1

As per the similar question , use @Captor annotation:

@Captor
private ArgumentCaptor<Optional<ZonedDateTime>> captor;

Answer 2

The below case is for a method signature of:

public void processMessage(Optional<ZonedDateTime> parsedDatetime) {

Since I don't know which Meteric class is used, I also hope AccountHandler class exists.

@Test
@SuppressWarnings("unchecked")
public void withValue() {
    ArgumentCaptor<Optional<ZonedDateTime>> timeCaptor = ArgumentCaptor.forClass(Optional.class);
    AccountHandler accountHandler = mock(AccountHandler.class);

    Optional<ZonedDateTime> input = Optional.of(ZonedDateTime.now());
    accountHandler.processMessage(input);

    verify(accountHandler).processMessage(timeCaptor.capture());

    Optional<ZonedDateTime> optional = timeCaptor.getValue();
    assertTrue(optional.isPresent());
    assertNotNull(optional.get());
}

@Test
@SuppressWarnings("unchecked")
public void nullOptional() {
    ArgumentCaptor<Optional<ZonedDateTime>> timeCaptor = ArgumentCaptor.forClass(Optional.class);
    AccountHandler accountHandler = mock(AccountHandler.class);

    Optional<ZonedDateTime> input = null;
    accountHandler.processMessage(input);

    verify(accountHandler).processMessage(timeCaptor.capture());

    Optional<ZonedDateTime> optional = timeCaptor.getValue();
    assertNull(optional);
}