counter: 1.1.3 - Implemented an integration test for the old message-format

[demos/kafka/wordcount] / src / test / java / de / juplo / kafka / wordcount / counter / CounterApplicationIT.java

diff --git a/src/test/java/de/juplo/kafka/wordcount/counter/CounterApplicationIT.java b/src/test/java/de/juplo/kafka/wordcount/counter/CounterApplicationIT.java
new file mode 100644 (file)
index 0000000..aad79b8
--- /dev/null
+++ b/src/test/java/de/juplo/kafka/wordcount/counter/CounterApplicationIT.java
@@ -0,0 +1,149 @@
+package de.juplo.kafka.wordcount.counter;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import lombok.RequiredArgsConstructor;
+import lombok.Value;
+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.counter.CounterApplicationIT.*;
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.awaitility.Awaitility.*;
+
+
+@SpringBootTest(
+               properties = {
+                               "spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
+                               "juplo.wordcount.counter.bootstrap-server=${spring.embedded.kafka.brokers}",
+                               "juplo.wordcount.counter.input-topic=" + TOPIC_IN,
+                               "juplo.wordcount.counter.output-topic=" + TOPIC_OUT })
+@EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT }, partitions = PARTITIONS)
+@Slf4j
+public class CounterApplicationIT
+{
+       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
+       {
+               kafkaTemplate.send(TOPIC_IN, "peter", "Hallo");
+               kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
+               kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
+               kafkaTemplate.send(TOPIC_IN, "klaus", "Müsch");
+               kafkaTemplate.send(TOPIC_IN, "klaus", "s");
+               kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
+               kafkaTemplate.send(TOPIC_IN, "peter", "Welt");
+               kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
+               kafkaTemplate.send(TOPIC_IN, "klaus", "s");
+               kafkaTemplate.send(TOPIC_IN, "peter", "Boäh");
+               kafkaTemplate.send(TOPIC_IN, "klaus", "s");
+
+               Message peter1 = Message.of(
+                               "{\"username\":\"peter\",\"word\":\"Hallo\"}",
+                               "1");
+               Message peter2 = Message.of(
+                               "{\"username\":\"peter\",\"word\":\"Welt\"}",
+                               "1");
+               Message peter3 = Message.of(
+                               "{\"username\":\"peter\",\"word\":\"Boäh\"}",
+                               "1");
+               Message peter4 = Message.of(
+                               "{\"username\":\"peter\",\"word\":\"Welt\"}",
+                               "2");
+               Message peter5 = Message.of(
+                               "{\"username\":\"peter\",\"word\":\"Boäh\"}",
+                               "2");
+               Message peter6 = Message.of(
+                               "{\"username\":\"peter\",\"word\":\"Boäh\"}",
+                               "3");
+
+               Message klaus1 = Message.of(
+                               "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
+                               "1");
+               Message klaus2 = Message.of(
+                               "{\"username\":\"klaus\",\"word\":\"Müsch\"}",
+                               "2");
+               Message klaus3 = Message.of(
+                               "{\"username\":\"klaus\",\"word\":\"s\"}",
+                               "1");
+               Message klaus4 = Message.of(
+                               "{\"username\":\"klaus\",\"word\":\"s\"}",
+                               "2");
+               Message klaus5 = Message.of(
+                               "{\"username\":\"klaus\",\"word\":\"s\"}",
+                               "3");
+
+               await("Expexted converted data")
+                               .atMost(Duration.ofSeconds(10))
+                               .untilAsserted(() ->
+                               {
+                                       assertThat(consumer.received).hasSize(2);
+                                       assertThat(consumer.received.get("klaus")).containsExactly(klaus1, klaus2, klaus3, klaus4, klaus5);
+                                       assertThat(consumer.received.get("peter")).containsExactly(peter1, peter2, peter3, peter4, peter5, peter6);
+                               });
+       }
+
+
+       @RequiredArgsConstructor
+       static class Consumer
+       {
+               private final MultiValueMap<String, Message> received = new LinkedMultiValueMap<>();
+               private final ObjectMapper mapper;
+
+               @KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
+               public void receive(ConsumerRecord<String, String> record) throws JsonProcessingException
+               {
+                       log.debug("Received message: {}", record);
+                       Key key = mapper.readValue(record.key(), Key.class);
+                       received.add(key.getUsername(), Message.of(record.key(),record.value()));
+               }
+       }
+
+       @Value(staticConstructor = "of")
+       static class Message
+       {
+               String key;
+               String value;
+       }
+
+       @TestConfiguration
+       static class Configuration
+       {
+               @Bean
+               Consumer consumer(ObjectMapper mapper)
+               {
+                       return new Consumer(mapper);
+               }
+       }
+}