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
  16 import java.time.Duration;
  17 import java.util.LinkedList;
  18 import java.util.List;
  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, mapper.writeValueAsString(recording));
  61
  62                 String word1 = mapper.writeValueAsString(Word.of("peter", "Hallo"));
  63                 String word2 = mapper.writeValueAsString(Word.of("peter", "Welt"));
  64
  65                 await("Expexted converted data")
  66                                 .atMost(Duration.ofSeconds(5))
  67                                 .untilAsserted(() ->
  68                                 {
  69                                         assertThat(consumer.received).hasSize(2);
  70                                         assertThat(consumer.received.get(0).value()).isEqualTo(word1);
  71                                         assertThat(consumer.received.get(1).value()).isEqualTo(word2);
  72                                 });
  73         }
  74
  75
  76         static class Consumer
  77         {
  78                 final List<ConsumerRecord<String, String>> received = new LinkedList<>();
  79
  80                 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
  81                 public void receive(ConsumerRecord<String, String> record)
  82                 {
  83                         log.debug("Received message: {}", record);
  84                         received.add(record);
  85                 }
  86         }
  87
  88         @TestConfiguration
  89         static class Configuration
  90         {
  91                 @Bean
  92                 Consumer consumer()
  93                 {
  94                         return new Consumer();
  95                 }
  96         }
  97 }