1 package de.juplo.kafka.wordcount.splitter;
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;
18 import java.time.Duration;
20 import static de.juplo.kafka.wordcount.splitter.SplitterApplicationTests.*;
21 import static org.assertj.core.api.Assertions.assertThat;
22 import static org.awaitility.Awaitility.*;
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)
33 public class SplitterApplicationTests
35 public final static String TOPIC_IN = "in";
36 public final static String TOPIC_OUT = "out";
37 static final int PARTITIONS = 2;
40 KafkaTemplate<String, String> kafkaTemplate;
50 consumer.received.clear();
55 void testSendMessage() throws Exception
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));
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"));
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"));
82 await("Expexted converted data")
83 .atMost(Duration.ofSeconds(5))
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);
95 final MultiValueMap<String, String> received = new LinkedMultiValueMap<>();
97 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
98 public void receive(ConsumerRecord<String, String> record)
100 log.debug("Received message: {}", record);
101 received.add(record.key(), record.value());
106 static class Configuration
111 return new Consumer();