assertTrue("Send should be immediately complete", metadata.isDone());
assertFalse("Send should be successful", isError(metadata));
assertEquals("Offset should be 0", 0, metadata.get().offset());
assertEquals(topic, metadata.get().topic());
assertEquals("We should have the record in our history", asList(record), producer.history());
producer.clear();
assertEquals("Clear should erase our history", 0, producer.history().size());
}
@Test
public void testManualCompletion() throws Exception {