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 com.fasterxml.jackson.core.JsonProcessingException;
   4 import com.fasterxml.jackson.databind.ObjectMapper;
   5 import lombok.RequiredArgsConstructor;
   6 import lombok.Value;
   7 import lombok.extern.slf4j.Slf4j;
   8 import org.apache.kafka.clients.consumer.ConsumerRecord;
   9 import org.apache.kafka.streams.state.KeyValueBytesStoreSupplier;
  10 import org.apache.kafka.streams.state.Stores;
  11 import org.junit.jupiter.api.BeforeEach;
  12 import org.junit.jupiter.api.Test;
  13 import org.springframework.beans.factory.annotation.Autowired;
  14 import org.springframework.boot.test.context.SpringBootTest;
  15 import org.springframework.boot.test.context.TestConfiguration;
  16 import org.springframework.context.annotation.Bean;
  17 import org.springframework.context.annotation.Primary;
  18 import org.springframework.kafka.annotation.KafkaListener;
  19 import org.springframework.kafka.core.KafkaTemplate;
  20 import org.springframework.kafka.test.context.EmbeddedKafka;
  21 import org.springframework.util.LinkedMultiValueMap;
  22 import org.springframework.util.MultiValueMap;
  23
  24 import java.time.Duration;
  25
  26 import static de.juplo.kafka.wordcount.counter.CounterApplicationIT.*;
  27 import static org.assertj.core.api.Assertions.assertThat;
  28 import static org.awaitility.Awaitility.*;
  29
  30
  31 @SpringBootTest(
  32                 properties = {
  33                                 "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
  34                                 "juplo.wordcount.counter.bootstrap-server=${spring.embedded.kafka.brokers}",
  35                                 "juplo.wordcount.counter.commit-interval=0",
  36                                 "juplo.wordcount.counter.cacheMaxBytes=0",
  37                                 "juplo.wordcount.counter.input-topic=" + TOPIC_IN,
  38                                 "juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
  39 @EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
  40 @Slf4j
  41 public class CounterApplicationIT
  42 {
  43         public final static String TOPIC_IN = "in";
  44         public final static String TOPIC_OUT = "out";
  45         static final int PARTITIONS = 2;
  46
  47         @Autowired
  48         KafkaTemplate<String, String> kafkaTemplate;
  49         @Autowired
  50         ObjectMapper mapper;
  51         @Autowired
  52         Consumer consumer;
  53
  54
  55         @BeforeEach
  56         public void clear()
  57         {
  58                 consumer.received.clear();
  59         }
  60
  61
  62         @Test
  63         void testSendMessage() throws Exception
  64         {
  65                 kafkaTemplate.send(TOPIC_IN, "peter", "Hallo");
  66                 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
  67                 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
  68                 kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
  69                 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
  70                 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
  71                 kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
  72                 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
  73                 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
  74                 kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
  75                 kafkaTemplate.send(TOPIC_IN, "klaus", "s");
  76
  77                 Message peter1 = Message.of(
  78                                 "{\"username\":\"peter\",\"word\":\"Hallo\"}",
  79                                 "1");
  80                 Message peter2 = Message.of(
  81                                 "{\"username\":\"peter\",\"word\":\"Welt\"}",
  82                                 "1");
  83                 Message peter3 = Message.of(
  84                                 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
  85                                 "1");
  86                 Message peter4 = Message.of(
  87                                 "{\"username\":\"peter\",\"word\":\"Welt\"}",
  88                                 "2");
  89                 Message peter5 = Message.of(
  90                                 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
  91                                 "2");
  92                 Message peter6 = Message.of(
  93                                 "{\"username\":\"peter\",\"word\":\"Boäh\"}",
  94                                 "3");
  95
  96                 Message klaus1 = Message.of(
  97                                 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
  98                                 "1");
  99                 Message klaus2 = Message.of(
 100                                 "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
 101                                 "2");
 102                 Message klaus3 = Message.of(
 103                                 "{\"username\":\"klaus\",\"word\":\"s\"}",
 104                                 "1");
 105                 Message klaus4 = Message.of(
 106                                 "{\"username\":\"klaus\",\"word\":\"s\"}",
 107                                 "2");
 108                 Message klaus5 = Message.of(
 109                                 "{\"username\":\"klaus\",\"word\":\"s\"}",
 110                                 "3");
 111
 112                 await("Expexted converted data")
 113                                 .atMost(Duration.ofSeconds(10))
 114                                 .untilAsserted(() ->
 115                                 {
 116                                         assertThat(consumer.received).hasSize(2);
 117                                         assertThat(consumer.received.get("klaus")).containsExactly(klaus1, klaus2, klaus3, klaus4, klaus5);
 118                                         assertThat(consumer.received.get("peter")).containsExactly(peter1, peter2, peter3, peter4, peter5, peter6);
 119                                 });
 120         }
 121
 122
 123         @RequiredArgsConstructor
 124         static class Consumer
 125         {
 126                 private final MultiValueMap<String, Message> received = new LinkedMultiValueMap<>();
 127                 private final ObjectMapper mapper;
 128
 129                 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
 130                 public void receive(ConsumerRecord<String, String> record) throws JsonProcessingException
 131                 {
 132                         log.debug("Received message: {}", record);
 133                         Key key = mapper.readValue(record.key(), Key.class);
 134                         received.add(key.getUsername(), Message.of(record.key(),record.value()));
 135                 }
 136         }
 137
 138         @Value(staticConstructor = "of")
 139         static class Message
 140         {
 141                 String key;
 142                 String value;
 143         }
 144
 145         @TestConfiguration
 146         static class Configuration
 147         {
 148                 @Bean
 149                 Consumer consumer(ObjectMapper mapper)
 150                 {
 151                         return new Consumer(mapper);
 152                 }
 153
 154                 @Primary
 155                 @Bean
 156                 KeyValueBytesStoreSupplier inMemoryStoreSupplier()
 157                 {
 158                         return Stores.inMemoryKeyValueStore("TEST-STORE");
 159                 }
 160         }
 161 }