juplo.de Git - demos/kafka/wordcount/blob - src/test/java/de/juplo/kafka/wordcount/counter/CounterApplicationIT.java

   1 package de.juplo.kafka.wordcount.counter;
   2
   3 import lombok.extern.slf4j.Slf4j;
   4 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
   5 import org.apache.kafka.streams.state.Stores;
   6 import org.junit.jupiter.api.BeforeEach;
   7 import org.junit.jupiter.api.Test;
   8 import org.springframework.beans.factory.annotation.Autowired;
   9 import org.springframework.boot.test.context.SpringBootTest;
  10 import org.springframework.boot.test.context.TestConfiguration;
  11 import org.springframework.context.annotation.Bean;
  12 import org.springframework.context.annotation.Primary;
  13 import org.springframework.kafka.annotation.KafkaListener;
  14 import org.springframework.kafka.core.KafkaTemplate;
  15 import org.springframework.kafka.support.KafkaHeaders;
  16 import org.springframework.kafka.test.context.EmbeddedKafka;
  17 import org.springframework.messaging.handler.annotation.Header;
  18 import org.springframework.messaging.handler.annotation.Payload;
  19 import org.springframework.util.LinkedMultiValueMap;
  20 import org.springframework.util.MultiValueMap;
  21
  22 import java.time.Duration;
  23
  24 import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.TOPIC_IN;
  25 import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.TOPIC_OUT;
  26 import static org.awaitility.Awaitility.await;
  27
  28
  29 @SpringBootTest(
  30                 properties = {
  31                                 "spring.kafka.producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer",
  32                                 "spring.kafka.producer.properties.spring.json.add.type.headers=false",
  33                                 "spring.kafka.consumer.auto-offset-reset=earliest",
  34                                 "spring.kafka.consumer.key-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer",
  35                                 "spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer",
  36                                 "spring.kafka.consumer.properties.spring.json.use.type.headers=false",
  37                                 "spring.kafka.consumer.properties.spring.json.key.default.type=de.juplo.kafka.wordcount.counter.Word",
  38                                 "spring.kafka.consumer.properties.spring.json.value.default.type=de.juplo.kafka.wordcount.counter.WordCounter",
  39                                 "logging.level.root=WARN",
  40                                 "logging.level.de.juplo=DEBUG",
  41                                 "juplo.wordcount.counter.bootstrap-server=${spring.embedded.kafka.brokers}",
  42                                 "juplo.wordcount.counter.commit-interval=0",
  43                                 "juplo.wordcount.counter.cacheMaxBytes=0",
  44                                 "juplo.wordcount.counter.input-topic=" + TOPIC_IN,
  45                                 "juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
  46 @EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT })
  47 @Slf4j
  48 public class CounterApplicationIT
  49 {
  50         public static final String TOPIC_IN = "in";
  51         public static final String TOPIC_OUT = "out";
  52
  53         @Autowired
  54         KafkaTemplate<String, Word> kafkaTemplate;
  55         @Autowired
  56         Consumer consumer;
  57
  58
  59         @BeforeEach
  60         public void clear()
  61         {
  62                 consumer.received.clear();
  63         }
  64
  65
  66         @Test
  67         void testSendMessage()
  68         {
  69                 TestData.injectInputMessages((key, value) -> kafkaTemplate.send(TOPIC_IN, key, value));
  70
  71                 await("Expected messages")
  72                                 .atMost(Duration.ofSeconds(10))
  73                                 .untilAsserted(() -> TestData.assertExpectedMessages(consumer.getReceivedMessages()));
  74         }
  75
  76
  77         static class Consumer
  78         {
  79                 private final MultiValueMap<Word, WordCounter> received = new LinkedMultiValueMap<>();
  80
  81                 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
  82                 public synchronized void receive(
  83                                 @Header(KafkaHeaders.RECEIVED_KEY) Word word,
  84                                 @Payload WordCounter counter)
  85                 {
  86                         log.debug("Received message: {} -> {}", word, counter);
  87                         received.add(word, counter);
  88                 }
  89
  90                 synchronized MultiValueMap<Word, WordCounter> getReceivedMessages()
  91                 {
  92                         return received;
  93                 }
  94         }
  95
  96         @TestConfiguration
  97         static class Configuration
  98         {
  99                 @Bean
 100                 Consumer consumer()
 101                 {
 102                         return new Consumer();
 103                 }
 104
 105                 @Primary
 106                 @Bean
 107                 KeyValueBytesStoreSupplier inMemoryStoreSupplier()
 108                 {
 109                         return Stores.inMemoryKeyValueStore("TEST-STORE");
 110                 }
 111         }
 112 }