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问题描述
我正在尝试为 ListenableFuture 添加 Callback 编写单元测试用例,但我不知道该怎么做.在互联网上没有得到任何有用的东西.
I am trying to write the unit test case for ListenableFuture adding Callback but I am not sure how to do it. Didn`t get anything useful on internet.
@Test
public void can_publish_data_to_kafka() {
String topic = someString(10);
String key = someAlphanumericString(5);
String data = someString(50);
SendResult sendResult = mock(SendResult.class);
ListenableFuture<SendResult<String, Object>> future = mock(ListenableFuture.class);
given(kafkaTemplate.send(topic, key, data)).willReturn(future);
doAnswer(new Answer() {
@Override
public Object answer(InvocationOnMock invocationOnMock) throws Throwable {
return invocationOnMock.getArguments()[1];
}
});
service.method(key, topic, data);
}
我要编写测试用例的代码
Code for which i want to write test case
ListenableFuture<SendResult<String, Object>> future = kafkaTemplate.send(topicName, key, data);
future.addCallback(new ListenableFutureCallback<SendResult<String, Object>>() {
@Override
public void onSuccess(SendResult<String, Object> stringKafkaBeanSendResult) {
RecordMetadata recordMetadata = stringKafkaBeanSendResult.getRecordMetadata();
LOGGER.info(String.format("sent message %s to topic %s partition %s with offset %s" + data.toString(), recordMetadata.topic(), recordMetadata.partition(), recordMetadata.offset()));
}
@Override
public void onFailure(Throwable throwable) {
LOGGER.error(String.format("unable to send message = %s to topic %s because of error %s" + data.toString(), topicName, throwable.getMessage()));
}
});
我期待一个使用 mockito 编写 UT 的方向.
I am expecting a direction in which i should go towards for writing UT using mockito.
推荐答案
你可以这样写一个测试用例.
You can write a test case like this.
@Test
public void can_publishDataToKafka() {
String key = someAlphanumericString();
String topic = someAlphaString(10);
long offset = somePositiveLong();
int partition = somePositiveInteger();
SiebelRecord siebelRecord = mock(SiebelRecord.class);
SendResult<String, Object> sendResult = mock(SendResult.class);
ListenableFuture<SendResult<String, Object>> responseFuture = mock(ListenableFuture.class);
RecordMetadata recordMetadata = new RecordMetadata(new TopicPartition(topic, partition), offset, 0L, 0L, 0L, 0, 0);
given(sendResult.getRecordMetadata()).willReturn(recordMetadata);
when(kafkaTemplate.send(topic, key, siebelRecord)).thenReturn(responseFuture);
doAnswer(invocationOnMock -> {
ListenableFutureCallback listenableFutureCallback = invocationOnMock.getArgument(0);
listenableFutureCallback.onSuccess(sendResult);
assertEquals(sendResult.getRecordMetadata().offset(), offset);
assertEquals(sendResult.getRecordMetadata().partition(), partition);
return null;
}).when(responseFuture).addCallback(any(ListenableFutureCallback.class));
service.publishDataToKafka(key, topic, siebelRecord);
verify(kafkaTemplate, times(1)).send(topic, key, siebelRecord);
}
@Test(expected = KafkaException.class)
public void can_capture_failure_publishDataToKafka() {
String key = someAlphanumericString();
String topic = someAlphaString(10);
String message = someString(20);
SiebelRecord siebelRecord = mock(SiebelRecord.class);
ListenableFuture<SendResult<String, Object>> responseFuture = mock(ListenableFuture.class);
Throwable throwable = mock(Throwable.class);
given(throwable.getMessage()).willReturn(message);
when(kafkaTemplate.send(topic, key, siebelRecord)).thenReturn(responseFuture);
doAnswer(invocationOnMock -> {
ListenableFutureCallback listenableFutureCallback = invocationOnMock.getArgument(0);
listenableFutureCallback.onFailure(throwable);
return null;
}).when(responseFuture).addCallback(any(ListenableFutureCallback.class));
service.publishDataToKafka(key, topic, siebelRecord);
}
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