--- /dev/null
+package de.juplo.kafka.wordcount.splitter;
+
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.context.TestConfiguration;
+import org.springframework.context.annotation.Bean;
+import org.springframework.kafka.annotation.KafkaListener;
+import org.springframework.kafka.core.KafkaTemplate;
+import org.springframework.kafka.test.context.EmbeddedKafka;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
+
+import java.time.Duration;
+
+import static de.juplo.kafka.wordcount.splitter.SplitterApplicationTests.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.awaitility.Awaitility.*;
+
+
+@SpringBootTest(
+ properties = {
+ "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
+ "juplo.wordcount.splitter.bootstrap-server=${spring.embedded.kafka.brokers}",
+ "juplo.wordcount.splitter.input-topic=" + TOPIC_IN,
+ "juplo.wordcount.splitter.output-topic=" + TOPIC_OUT })
+@EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
+@Slf4j
+public class SplitterApplicationTests
+{
+ public final static String TOPIC_IN = "in";
+ public final static String TOPIC_OUT = "out";
+ static final int PARTITIONS = 2;
+
+ @Autowired
+ KafkaTemplate<String, String> kafkaTemplate;
+ @Autowired
+ ObjectMapper mapper;
+ @Autowired
+ Consumer consumer;
+
+
+ @BeforeEach
+ public void clear()
+ {
+ consumer.received.clear();
+ }
+
+
+ @Test
+ void testSendMessage() throws Exception
+ {
+ Recording recording = new Recording();
+ recording.setUser("peter");
+ recording.setSentence("Hallo Welt!");
+ kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
+ recording.setUser("klaus");
+ recording.setSentence("Müsch gäb's auch!");
+ kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
+ recording.setUser("peter");
+ recording.setSentence("Boäh, echt! ß mal nä Nümmäh!");
+ kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
+
+ String peter1 = mapper.writeValueAsString(Word.of("peter", "Hallo"));
+ String peter2 = mapper.writeValueAsString(Word.of("peter", "Welt"));
+ String peter3 = mapper.writeValueAsString(Word.of("peter", "Boäh"));
+ String peter4 = mapper.writeValueAsString(Word.of("peter", "echt"));
+ String peter5 = mapper.writeValueAsString(Word.of("peter", "ß"));
+ String peter6 = mapper.writeValueAsString(Word.of("peter", "mal"));
+ String peter7 = mapper.writeValueAsString(Word.of("peter", "nä"));
+ String peter8 = mapper.writeValueAsString(Word.of("peter", "Nümmäh"));
+
+ String klaus1 = mapper.writeValueAsString(Word.of("klaus","Müsch"));
+ String klaus2 = mapper.writeValueAsString(Word.of("klaus","gäb"));
+ String klaus3 = mapper.writeValueAsString(Word.of("klaus","s"));
+ String klaus4 = mapper.writeValueAsString(Word.of("klaus","auch"));
+
+ await("Expexted converted data")
+ .atMost(Duration.ofSeconds(5))
+ .untilAsserted(() ->
+ {
+ assertThat(consumer.received).hasSize(2);
+ assertThat(consumer.received.get("klaus")).containsExactly(klaus1, klaus2, klaus3, klaus4);
+ assertThat(consumer.received.get("peter")).containsExactly(peter1, peter2, peter3, peter4, peter5, peter6, peter7, peter8);
+ });
+ }
+
+
+ static class Consumer
+ {
+ final MultiValueMap<String, String> received = new LinkedMultiValueMap<>();
+
+ @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
+ public void receive(ConsumerRecord<String, String> record)
+ {
+ log.debug("Received message: {}", record);
+ received.add(record.key(), record.value());
+ }
+ }
+
+ @TestConfiguration
+ static class Configuration
+ {
+ @Bean
+ Consumer consumer()
+ {
+ return new Consumer();
+ }
+ }
+}