juplo.de Git - demos/kafka/wordcount/blob - src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationTests.java

   1 package de.juplo.kafka.wordcount.splitter;
   2
   3 import com.fasterxml.jackson.databind.ObjectMapper;
   4 import lombok.extern.slf4j.Slf4j;
   5 import org.apache.kafka.clients.consumer.ConsumerRecord;
   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.kafka.annotation.KafkaListener;
  13 import org.springframework.kafka.core.KafkaTemplate;
  14 import org.springframework.kafka.test.context.EmbeddedKafka;
  15 import org.springframework.util.LinkedMultiValueMap;
  16 import org.springframework.util.MultiValueMap;
  17
  18 import java.time.Duration;
  19
  20 import static de.juplo.kafka.wordcount.splitter.SplitterApplicationTests.*;
  21 import static org.assertj.core.api.Assertions.assertThat;
  22 import static org.awaitility.Awaitility.*;
  23
  24
  25 @SpringBootTest(
  26                 properties = {
  27                                 "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
  28                                 "juplo.wordcount.splitter.bootstrap-server=${spring.embedded.kafka.brokers}",
  29                                 "juplo.wordcount.splitter.input-topic=" + TOPIC_IN,
  30                                 "juplo.wordcount.splitter.output-topic=" + TOPIC_OUT })
  31 @EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
  32 @Slf4j
  33 public class SplitterApplicationTests
  34 {
  35         public final static String TOPIC_IN = "in";
  36         public final static String TOPIC_OUT = "out";
  37         static final int PARTITIONS = 2;
  38
  39         @Autowired
  40         KafkaTemplate<String, String> kafkaTemplate;
  41         @Autowired
  42         ObjectMapper mapper;
  43         @Autowired
  44         Consumer consumer;
  45
  46
  47         @BeforeEach
  48         public void clear()
  49         {
  50                 consumer.received.clear();
  51         }
  52
  53
  54         @Test
  55         void testSendMessage() throws Exception
  56         {
  57                 Recording recording = new Recording();
  58                 recording.setUser("peter");
  59                 recording.setSentence("Hallo Welt!");
  60                 kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
  61                 recording.setUser("klaus");
  62                 recording.setSentence("Müsch gäb's auch!");
  63                 kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
  64                 recording.setUser("peter");
  65                 recording.setSentence("Boäh, echt! ß mal nä Nümmäh!");
  66                 kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
  67
  68                 String peter1 = mapper.writeValueAsString(Word.of("peter", "Hallo"));
  69                 String peter2 = mapper.writeValueAsString(Word.of("peter", "Welt"));
  70                 String peter3 = mapper.writeValueAsString(Word.of("peter", "Boäh"));
  71                 String peter4 = mapper.writeValueAsString(Word.of("peter", "echt"));
  72                 String peter5 = mapper.writeValueAsString(Word.of("peter", "ß"));
  73                 String peter6 = mapper.writeValueAsString(Word.of("peter", "mal"));
  74                 String peter7 = mapper.writeValueAsString(Word.of("peter", "nä"));
  75                 String peter8 = mapper.writeValueAsString(Word.of("peter", "Nümmäh"));
  76
  77                 String klaus1 = mapper.writeValueAsString(Word.of("klaus","Müsch"));
  78                 String klaus2 = mapper.writeValueAsString(Word.of("klaus","gäb"));
  79                 String klaus3 = mapper.writeValueAsString(Word.of("klaus","s"));
  80                 String klaus4 = mapper.writeValueAsString(Word.of("klaus","auch"));
  81
  82                 await("Expexted converted data")
  83                                 .atMost(Duration.ofSeconds(5))
  84                                 .untilAsserted(() ->
  85                                 {
  86                                         assertThat(consumer.received).hasSize(2);
  87                                         assertThat(consumer.received.get("klaus")).containsExactly(klaus1, klaus2, klaus3, klaus4);
  88                                         assertThat(consumer.received.get("peter")).containsExactly(peter1, peter2, peter3, peter4, peter5, peter6, peter7, peter8);
  89                                 });
  90         }
  91
  92
  93         static class Consumer
  94         {
  95                 final MultiValueMap<String, String> received = new LinkedMultiValueMap<>();
  96
  97                 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
  98                 public void receive(ConsumerRecord<String, String> record)
  99                 {
 100                         log.debug("Received message: {}", record);
 101                         received.add(record.key(), record.value());
 102                 }
 103         }
 104
 105         @TestConfiguration
 106         static class Configuration
 107         {
 108                 @Bean
 109                 Consumer consumer()
 110                 {
 111                         return new Consumer();
 112                 }
 113         }
 114 }