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