问带lambda的Mockito ArgumentCaptor (编年史队列)

EN

public class Persister  {

public Persister(SingleChronicleQueue chronicle) {
    this.chronicle = chronicle;
}
public void write(int outBufferOffset) throws IOException {
       ExcerptAppender appender = chronicle.acquireAppender();
       appender.writeBytes(b -> {
               b.writeInt(outBufferOffset);                    
               b.write(writeBuffer, 0 , outBufferOffset);
       });}
}

@Mock
SingleChronicleQueue chronicle;
@Mock
ExcerptAppender appender;
@Captor
ArgumentCaptor<WriteBytesMarshallable> argumentCaptorLambda;

Persister persister = new Persister();
@Test
public void shouldPersistByteMessage() throws IOException {
    persister.write(MESSAGEBYTES);

    verify(appender).writeBytes(argumentCaptorLambda.capture());
    WriteBytesMarshallable lastValue =  argumentCaptorLambda.getValue();

    //final byte[] persistedBytes = ?? how to get writeBuffer here ??
    //assertThat(readPersistedMessage(persistedBytes), is(MESSAGE));
}