juplo.de Git - demos/kafka/wordcount/blob - src/test/java/de/juplo/kafka/wordcount/recorder/ApplicationTests.java

   1 package de.juplo.kafka.wordcount.recorder;
   2
   3 import de.juplo.kafka.wordcount.splitter.TestRecording;
   4 import lombok.extern.slf4j.Slf4j;
   5 import org.junit.jupiter.api.DisplayName;
   6 import org.junit.jupiter.api.Test;
   7 import org.springframework.beans.factory.annotation.Autowired;
   8 import org.springframework.boot.test.autoconfigure.web.servlet.AutoConfigureMockMvc;
   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.http.MediaType;
  13 import org.springframework.kafka.annotation.KafkaListener;
  14 import org.springframework.kafka.support.KafkaHeaders;
  15 import org.springframework.kafka.test.context.EmbeddedKafka;
  16 import org.springframework.messaging.handler.annotation.Header;
  17 import org.springframework.messaging.handler.annotation.Payload;
  18 import org.springframework.test.web.servlet.MockMvc;
  19 import org.springframework.test.web.servlet.MvcResult;
  20 import org.springframework.util.LinkedMultiValueMap;
  21 import org.springframework.util.MultiValueMap;
  22
  23 import java.time.Duration;
  24 import java.util.List;
  25 import java.util.stream.Stream;
  26
  27 import static de.juplo.kafka.wordcount.recorder.ApplicationTests.TOPIC_OUT;
  28 import static org.assertj.core.api.Assertions.assertThat;
  29 import static org.awaitility.Awaitility.await;
  30 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.asyncDispatch;
  31 import static org.springframework.test.web.servlet.request.MockMvcRequestBuilders.post;
  32 import static org.springframework.test.web.servlet.result.MockMvcResultHandlers.print;
  33 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.jsonPath;
  34 import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.status;
  35
  36
  37 @SpringBootTest(
  38                 properties = {
  39                                 "spring.kafka.consumer.auto-offset-reset=earliest",
  40                                 "spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer",
  41                                 "spring.kafka.consumer.properties.spring.json.value.default.type=de.juplo.kafka.wordcount.splitter.TestRecording",
  42                                 "spring.kafka.consumer.properties.spring.json.trusted.packages=de.juplo.kafka.wordcount.recorder",
  43                                 "logging.level.root=WARN",
  44                                 "logging.level.de.juplo=DEBUG",
  45                                 "juplo.wordcount.recorder.bootstrap-server=${spring.embedded.kafka.brokers}",
  46                                 "juplo.wordcount.recorder.topic=" + TOPIC_OUT })
  47 @AutoConfigureMockMvc
  48 @EmbeddedKafka(topics = { TOPIC_OUT })
  49 @Slf4j
  50 class ApplicationTests
  51 {
  52         static final String TOPIC_OUT = "out";
  53
  54         @Autowired
  55         MockMvc mockMvc;
  56         @Autowired
  57         Consumer consumer;
  58
  59
  60         @Test
  61         @DisplayName("Posted messages are accepted and sent to Kafka")
  62         void userMessagesAreAcceptedAndSentToKafka()
  63         {
  64                 MultiValueMap<String, TestRecording> recordings = new LinkedMultiValueMap<>();
  65
  66                 Stream
  67                                 .of(
  68                                                 new TestRecording("päter", "Hall° Wält?¢*&%€!"),
  69                                                 new TestRecording("päter", "Hallo Welt!"),
  70                                                 new TestRecording("klühs", "Müsch gäb's auch!"),
  71                                                 new TestRecording("päter", "Boäh, echt! ß mal nä Nümmäh!"))
  72                                 .forEach(recording ->
  73                                 {
  74                                         sendRedording(recording.getUser(), recording.getSentence());
  75                                         recordings.add(recording.getUser(), recording);
  76                                 });
  77
  78
  79                 await("Received expected messages")
  80                                 .atMost(Duration.ofSeconds(5))
  81                                 .untilAsserted(() -> recordings.forEach((user, userRecordings) ->
  82                                                 assertThat(consumer.receivedFor(user)).containsExactlyElementsOf(userRecordings)));
  83         }
  84
  85         void sendRedording(String user, String sentence)
  86         {
  87                 try
  88                 {
  89                         MvcResult result = mockMvc
  90                                         .perform(post("/{user}", user)
  91                                                         .contentType(MediaType.TEXT_PLAIN)
  92                                                         .content(sentence))
  93                                         .andReturn();
  94
  95                         mockMvc.perform(asyncDispatch(result))
  96                                         .andDo(print())
  97                                         .andExpect(status().isOk())
  98                                         .andExpect(jsonPath("$.username").value(user))
  99                                         .andExpect(jsonPath("$.sentence").value(sentence));
 100                 }
 101                 catch (Exception e)
 102                 {
 103                         throw new RuntimeException(e);
 104                 }
 105         }
 106
 107
 108         static class Consumer
 109         {
 110                 private final MultiValueMap<String, TestRecording> received = new LinkedMultiValueMap<>();
 111
 112                 @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
 113                 public synchronized void receive(
 114                                 @Header(KafkaHeaders.RECEIVED_KEY) String user,
 115                                 @Payload TestRecording recording)
 116                 {
 117                         log.debug("Received message: {}={}", user, recording);
 118                         received.add(user, recording);
 119                 }
 120
 121                 synchronized List<TestRecording> receivedFor(String user)
 122                 {
 123                         List<TestRecording> recordings = received.get(user);
 124                         return recordings == null
 125                                         ? List.of()
 126                                         : received.get(user).stream().toList();
 127                 }
 128         }
 129
 130         @TestConfiguration
 131         static class Configuration
 132         {
 133                 @Bean
 134                 Consumer consumer()
 135                 {
 136                         return new Consumer();
 137                 }
 138         }
 139 }