From: Kai Moritz <kai@juplo.de>
Date: Sun, 26 May 2024 10:57:51 +0000 (+0200)
Subject: splitter: 1.2.0 - Refined `SplitterApplicationIT`
X-Git-Tag: splitter-1.2.0~13
X-Git-Url: http://juplo.de/gitweb/?a=commitdiff_plain;h=72872effdc38ff886532c895a1a4ae1a8e6aa95c;p=demos%2Fkafka%2Fwordcount

splitter: 1.2.0 - Refined `SplitterApplicationIT`
---

diff --git a/src/test/java/de/juplo/kafka/wordcount/counter/TestWord.java b/src/test/java/de/juplo/kafka/wordcount/counter/TestWord.java
new file mode 100644
index 0000000..f2c2447
--- /dev/null
+++ b/src/test/java/de/juplo/kafka/wordcount/counter/TestWord.java
@@ -0,0 +1,15 @@
+package de.juplo.kafka.wordcount.counter;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+
+@Data
+@NoArgsConstructor
+@AllArgsConstructor
+public class TestWord
+{
+  String user;
+  String word;
+}
diff --git a/src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationIT.java b/src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationIT.java
index 92dfd10..d1bbc0f 100644
--- a/src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationIT.java
+++ b/src/test/java/de/juplo/kafka/wordcount/splitter/SplitterApplicationIT.java
@@ -1,8 +1,8 @@
 package de.juplo.kafka.wordcount.splitter;
 
-import com.fasterxml.jackson.databind.ObjectMapper;
+import de.juplo.kafka.wordcount.counter.TestWord;
 import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
+import org.apache.kafka.streams.KeyValue;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.beans.factory.annotation.Autowired;
@@ -11,35 +11,44 @@ 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.support.KafkaHeaders;
 import org.springframework.kafka.test.context.EmbeddedKafka;
+import org.springframework.messaging.handler.annotation.Header;
+import org.springframework.messaging.handler.annotation.Payload;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 
 import java.time.Duration;
+import java.util.function.BiConsumer;
+import java.util.stream.Stream;
 
 import static de.juplo.kafka.wordcount.splitter.SplitterApplicationIT.*;
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.awaitility.Awaitility.*;
+import static org.awaitility.Awaitility.await;
 
 
 @SpringBootTest(
 		properties = {
-				"spring.kafka.bootstrap-servers=${spring.embedded.kafka.brokers}",
+				"spring.kafka.producer.value-serializer=org.springframework.kafka.support.serializer.JsonSerializer",
+				"spring.kafka.producer.properties.spring.json.add.type.headers=false",
+				"spring.kafka.consumer.auto-offset-reset=earliest",
+				"spring.kafka.consumer.value-deserializer=org.springframework.kafka.support.serializer.JsonDeserializer",
+				"spring.kafka.consumer.properties.spring.json.value.default.type=de.juplo.kafka.wordcount.counter.TestWord",
+				"spring.kafka.consumer.properties.spring.json.trusted.packages=de.juplo.kafka.wordcount.splitter",
+				"logging.level.root=WARN",
+				"logging.level.de.juplo=DEBUG",
 				"juplo.wordcount.splitter.bootstrap-server=${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)
+@EmbeddedKafka(topics = { TOPIC_IN, TOPIC_OUT })
 @Slf4j
 public class SplitterApplicationIT
 {
 	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;
+	KafkaTemplate<String, Recording> kafkaTemplate;
 	@Autowired
 	Consumer consumer;
 
@@ -50,58 +59,107 @@ public class SplitterApplicationIT
 		consumer.received.clear();
 	}
 
-
-	@Test
-	void testSendMessage() throws Exception
+	static void writeInputData(BiConsumer<String, Recording> consumer)
 	{
-		Recording recording = new Recording();
+		Recording recording;
+
+		recording = new Recording();
 		recording.setUser("peter");
 		recording.setSentence("Hallo Welt!");
-		kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
+		consumer.accept(recording.getUser(), recording);
+
+		recording = new Recording();
 		recording.setUser("klaus");
 		recording.setSentence("Müsch gäb's auch!");
-		kafkaTemplate.send(TOPIC_IN, recording.getUser(), mapper.writeValueAsString(recording));
+		consumer.accept(recording.getUser(), recording);
+
+		recording = new 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"));
+		consumer.accept(recording.getUser(), recording);
+	}
+
+	@Test
+	void testSendMessage() throws Exception
+	{
+		writeInputData((user, recording) -> kafkaTemplate.send(TOPIC_IN, user, recording));
 
 		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);
-				});
+						assertExpectedMessages(consumer.getReceivedMessages()));
+	}
+
+
+	static void assertExpectedMessages(MultiValueMap<String, TestWord> receivedMessages)
+	{
+		MultiValueMap<String, TestWord> expected = new LinkedMultiValueMap<>();
+		expectedMessages.forEach(keyValue -> expected.add(keyValue.key, keyValue.value));
+		await("Received expected messages")
+				.atMost(Duration.ofSeconds(5))
+				.untilAsserted(() -> expected.forEach((user, word) ->
+						assertThat(receivedMessages.get(user)).containsExactlyElementsOf(word)));
 	}
 
+	static Stream<KeyValue<String, TestWord>> expectedMessages = Stream.of(
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "Hallo")),
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "Welt")),
+			KeyValue.pair(
+					"klaus",
+					new TestWord("klaus", "Müsch")),
+			KeyValue.pair(
+					"klaus",
+					new TestWord("klaus", "gäb")),
+			KeyValue.pair(
+					"klaus",
+					new TestWord("klaus", "s")),
+			KeyValue.pair(
+					"klaus",
+					new TestWord("klaus", "auch")),
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "Boäh")),
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "echt")),
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "ß")),
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "mal")),
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "nä")),
+			KeyValue.pair(
+					"peter",
+					new TestWord("peter", "Nümmäh")));
+
 
 	static class Consumer
 	{
-		final MultiValueMap<String, String> received = new LinkedMultiValueMap<>();
+		private final MultiValueMap<String, TestWord> received = new LinkedMultiValueMap<>();
 
 		@KafkaListener(groupId = "TEST", topics = TOPIC_OUT)
-		public void receive(ConsumerRecord<String, String> record)
+		public synchronized void receive(
+				@Header(KafkaHeaders.RECEIVED_KEY) String key,
+				@Payload TestWord value)
 		{
-			log.debug("Received message: {}", record);
-			received.add(record.key(), record.value());
+			log.debug("Received message: {}={}", key, value);
+			received.add(key, value);
+		}
+
+		synchronized MultiValueMap<String, TestWord> getReceivedMessages()
+		{
+			return received;
 		}
 	}
 
+
 	@TestConfiguration
 	static class Configuration
 	{