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.RequiredArgsConstructor;
   4 import lombok.extern.slf4j.Slf4j;
   5 import org.apache.kafka.clients.consumer.ConsumerRecord;
   6 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
   7 import org.apache.kafka.streams.state.Stores;
   8 import org.junit.jupiter.api.BeforeEach;
   9 import org.junit.jupiter.api.Test;
  10 import org.springframework.beans.factory.annotation.Autowired;
  11 import org.springframework.boot.test.context.SpringBootTest;
  12 import org.springframework.boot.test.context.TestConfiguration;
  13 import org.springframework.context.annotation.Bean;
  14 import org.springframework.context.annotation.Primary;
  15 import org.springframework.kafka.annotation.KafkaListener;
  16 import org.springframework.kafka.core.KafkaTemplate;
  17 import org.springframework.kafka.test.context.EmbeddedKafka;
  18
  19 import java.time.Duration;
  20 import java.util.LinkedList;
  21 import java.util.List;
  22
  23 import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.*;
  24 import static org.awaitility.Awaitility.*;
  25
  26
  27 @SpringBootTest(
  28                 properties = {
  29                                 "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
  30                                 "juplo.wordcount.counter.bootstrap-server=${spring.embedded.kafka.brokers}",
  31                                 "juplo.wordcount.counter.commit-interval=0",
  32                                 "juplo.wordcount.counter.cacheMaxBytes=0",
  33                                 "juplo.wordcount.counter.input-topic=" + TOPIC_IN,
  34                                 "juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
  35 @EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
  36 @Slf4j
  37 public class CounterApplicationIT
  38 {
  39         public final static String TOPIC_IN = "in";
  40         public final static String TOPIC_OUT = "out";
  41         static final int PARTITIONS = 2;
  42
  43         @Autowired
  44         KafkaTemplate<String, String> kafkaTemplate;
  45         @Autowired
  46         Consumer consumer;
  47
  48
  49         @BeforeEach
  50         public void clear()
  51         {
  52                 consumer.received.clear();
  53         }
  54
  55
  56         @Test
  57         void testSendMessage()
  58         {
  59                 TestData.writeInputData((key, value) -> kafkaTemplate.send(TOPIC_IN, key, value));
  60
  61                 await("Expexted converted data")
  62                                 .atMost(Duration.ofSeconds(10))
  63                                 .untilAsserted(() -> TestData.assertExpectedResult(consumer.received));
  64         }
  65
  66
  67         @RequiredArgsConstructor
  68         static class Consumer
  69         {
  70                 private final List<Message> received = new LinkedList<>();
  71
  72                 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
  73                 public void receive(ConsumerRecord<String, String> record)
  74                 {
  75                         log.debug("Received message: {}", record);
  76                         received.add(Message.of(record.key(),record.value()));
  77                 }
  78         }
  79
  80         @TestConfiguration
  81         static class Configuration
  82         {
  83                 @Bean
  84                 Consumer consumer()
  85                 {
  86                         return new Consumer();
  87                 }
  88
  89                 @Primary
  90                 @Bean
  91                 KeyValueBytesStoreSupplier inMemoryStoreSupplier()
  92                 {
  93                         return Stores.inMemoryKeyValueStore("TEST-STORE");
  94                 }
  95         }
  96 }