X-Git-Url: https://juplo.de/gitweb/?a=blobdiff_plain;f=src%2Ftest%2Fjava%2Fde%2Fjuplo%2Fkafka%2FApplicationTests.java;h=a1501769255f2be2a0eb788045ec71812b7517b5;hb=595eab489c638b07072f6ec7e3c6f52000295931;hp=35d13cdda9ecb9749edbaeb6be8fc905fbe30c45;hpb=9d3fa83eb656617162d54a14e1bfcb330fa4ee3a;p=demos%2Fkafka%2Ftraining

diff --git a/src/test/java/de/juplo/kafka/ApplicationTests.java b/src/test/java/de/juplo/kafka/ApplicationTests.java
index 35d13cd..a150176 100644
--- a/src/test/java/de/juplo/kafka/ApplicationTests.java
+++ b/src/test/java/de/juplo/kafka/ApplicationTests.java
@@ -1,314 +1,155 @@
 package de.juplo.kafka;
 
 import lombok.extern.slf4j.Slf4j;
-import org.apache.kafka.clients.consumer.ConsumerRecord;
-import org.apache.kafka.clients.consumer.KafkaConsumer;
-import org.apache.kafka.clients.producer.KafkaProducer;
 import org.apache.kafka.clients.producer.ProducerRecord;
-import org.apache.kafka.common.TopicPartition;
-import org.apache.kafka.common.errors.RecordDeserializationException;
-import org.apache.kafka.common.serialization.BytesDeserializer;
-import org.apache.kafka.common.serialization.BytesSerializer;
-import org.apache.kafka.common.serialization.LongSerializer;
 import org.apache.kafka.common.serialization.StringSerializer;
 import org.apache.kafka.common.utils.Bytes;
-import org.junit.jupiter.api.*;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.boot.test.context.ConfigDataApplicationContextInitializer;
-import org.springframework.boot.test.context.TestConfiguration;
-import org.springframework.context.annotation.Bean;
-import org.springframework.context.annotation.Import;
-import org.springframework.kafka.test.context.EmbeddedKafka;
-import org.springframework.test.context.TestPropertySource;
-import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
-import java.time.Duration;
 import java.util.*;
-import java.util.concurrent.ExecutionException;
-import java.util.concurrent.ExecutorService;
-import java.util.function.BiConsumer;
+
 import java.util.function.Consumer;
-import java.util.function.Function;
 import java.util.stream.Collectors;
 import java.util.stream.IntStream;
 
-import static de.juplo.kafka.ApplicationTests.PARTITIONS;
-import static de.juplo.kafka.ApplicationTests.TOPIC;
 import static org.assertj.core.api.Assertions.assertThat;
-import static org.awaitility.Awaitility.*;
-import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
-import static org.junit.jupiter.api.Assertions.assertThrows;
 
 
-@SpringJUnitConfig(initializers = ConfigDataApplicationContextInitializer.class)
-@TestMethodOrder(MethodOrderer.OrderAnnotation.class)
-@TestPropertySource(
-		properties = {
-				"consumer.bootstrap-server=${spring.embedded.kafka.brokers}",
-				"consumer.topic=" + TOPIC })
-@EmbeddedKafka(topics = TOPIC, partitions = PARTITIONS)
 @Slf4j
-class ApplicationTests
+public class ApplicationTests extends GenericApplicationTests<String, String>
 {
-	public static final String TOPIC = "FOO";
-	public static final int PARTITIONS = 10;
-
-
-	StringSerializer stringSerializer = new StringSerializer();
-	LongSerializer longSerializer = new LongSerializer();
-
-	@Autowired
-	KafkaProducer<String, Bytes> kafkaProducer;
-	@Autowired
-	KafkaConsumer<String, Long> kafkaConsumer;
-	@Autowired
-	KafkaConsumer<Bytes, Bytes> offsetConsumer;
-	@Autowired
-	ApplicationProperties properties;
-	@Autowired
-	ExecutorService executor;
-
-	Consumer<ConsumerRecord<String, Long>> testHandler;
-	EndlessConsumer<String, Long> endlessConsumer;
-	Map<TopicPartition, Long> oldOffsets;
-	Map<TopicPartition, Long> newOffsets;
-	Set<ConsumerRecord<String, Long>> receivedRecords;
-
-
-	/** Tests methods */
-
-	@Test
-	@Order(1) // << The poistion pill is not skipped. Hence, this test must run first
-	void commitsCurrentOffsetsOnSuccess() throws ExecutionException, InterruptedException
-	{
-		send100Messages(i ->  new Bytes(longSerializer.serialize(TOPIC, i)));
-
-		await("100 records received")
-				.atMost(Duration.ofSeconds(30))
-				.until(() -> receivedRecords.size() >= 100);
-
-		await("Offsets committed")
-				.atMost(Duration.ofSeconds(10))
-				.untilAsserted(() ->
-				{
-					checkSeenOffsetsForProgress();
-					compareToCommitedOffsets(newOffsets);
-				});
-
-		assertThrows(
-				IllegalStateException.class,
-				() -> endlessConsumer.exitStatus(),
-				"Consumer should still be running");
-	}
-
-	@Test
-	@Order(2)
-	void commitsOffsetOfErrorForReprocessingOnError()
-	{
-		send100Messages(counter ->
-				counter == 77
-						? new Bytes(stringSerializer.serialize(TOPIC, "BOOM!"))
-						: new Bytes(longSerializer.serialize(TOPIC, counter)));
-
-		await("Consumer failed")
-				.atMost(Duration.ofSeconds(30))
-				.until(() -> !endlessConsumer.running());
-
-		checkSeenOffsetsForProgress();
-		compareToCommitedOffsets(newOffsets);
-
-		endlessConsumer.start();
-		await("Consumer failed")
-				.atMost(Duration.ofSeconds(30))
-				.until(() -> !endlessConsumer.running());
-
-		checkSeenOffsetsForProgress();
-		compareToCommitedOffsets(newOffsets);
-		assertThat(receivedRecords.size())
-				.describedAs("Received not all sent events")
-				.isLessThan(100);
-
-		assertDoesNotThrow(
-				() -> endlessConsumer.exitStatus(),
-				"Consumer should not be running");
-		assertThat(endlessConsumer.exitStatus())
-				.describedAs("Consumer should have exited abnormally")
-				.containsInstanceOf(RecordDeserializationException.class);
-	}
-
-
-	/** Helper methods for the verification of expectations */
-
-	void compareToCommitedOffsets(Map<TopicPartition, Long> offsetsToCheck)
-	{
-		doForCurrentOffsets((tp, offset) ->
-		{
-			Long expected = offsetsToCheck.get(tp) + 1;
-			log.debug("Checking, if the offset for {} is {}", tp, expected);
-			assertThat(offset)
-					.describedAs("Committed offset corresponds to the offset of the consumer")
-					.isEqualTo(expected);
-		});
-	}
-
-	void checkSeenOffsetsForProgress()
-	{
-		// Be sure, that some messages were consumed...!
-		Set<TopicPartition> withProgress = new HashSet<>();
-		partitions().forEach(tp ->
-		{
-			Long oldOffset = oldOffsets.get(tp);
-			Long newOffset = newOffsets.get(tp);
-			if (!oldOffset.equals(newOffset))
-			{
-				log.debug("Progress for {}: {} -> {}", tp, oldOffset, newOffset);
-				withProgress.add(tp);
-			}
-		});
-		assertThat(withProgress)
-				.describedAs("Some offsets must have changed, compared to the old offset-positions")
-				.isNotEmpty();
-	}
-
-
-	/** Helper methods for setting up and running the tests */
-
-	void doForCurrentOffsets(BiConsumer<TopicPartition, Long> consumer)
-	{
-		offsetConsumer.assign(partitions());
-		partitions().forEach(tp -> consumer.accept(tp, offsetConsumer.position(tp)));
-		offsetConsumer.unsubscribe();
-	}
-
-	List<TopicPartition> partitions()
-	{
-		return
-				IntStream
-						.range(0, PARTITIONS)
-						.mapToObj(partition -> new TopicPartition(TOPIC, partition))
-						.collect(Collectors.toList());
-	}
-
-
-	void send100Messages(Function<Long, Bytes> messageGenerator)
-	{
-		long i = 0;
-
-		for (int partition = 0; partition < 10; partition++)
-		{
-			for (int key = 0; key < 10; key++)
-			{
-				Bytes value = messageGenerator.apply(++i);
-
-				ProducerRecord<String, Bytes> record =
-						new ProducerRecord<>(
-								TOPIC,
-								partition,
-								Integer.toString(key%2),
-								value);
-
-				kafkaProducer.send(record, (metadata, e) ->
-				{
-					if (metadata != null)
-					{
-						log.debug(
-								"{}|{} - {}={}",
-								metadata.partition(),
-								metadata.offset(),
-								record.key(),
-								record.value());
-					}
-					else
-					{
-						log.warn(
-								"Exception for {}={}: {}",
-								record.key(),
-								record.value(),
-								e.toString());
-					}
-				});
-			}
-		}
-	}
-
-
-	@BeforeEach
-	public void init()
-	{
-		testHandler = record -> {} ;
-
-		oldOffsets = new HashMap<>();
-		newOffsets = new HashMap<>();
-		receivedRecords = new HashSet<>();
-
-		doForCurrentOffsets((tp, offset) ->
-		{
-			oldOffsets.put(tp, offset - 1);
-			newOffsets.put(tp, offset - 1);
-		});
-
-		Consumer<ConsumerRecord<String, Long>> captureOffsetAndExecuteTestHandler =
-				record ->
-				{
-					newOffsets.put(
-							new TopicPartition(record.topic(), record.partition()),
-							record.offset());
-					receivedRecords.add(record);
-					testHandler.accept(record);
-				};
-
-		endlessConsumer =
-				new EndlessConsumer<>(
-						executor,
-						properties.getClientId(),
-						properties.getTopic(),
-						kafkaConsumer,
-						captureOffsetAndExecuteTestHandler);
-
-		endlessConsumer.start();
-	}
-
-	@AfterEach
-	public void deinit()
-	{
-		try
-		{
-			endlessConsumer.stop();
-		}
-		catch (Exception e)
-		{
-			log.info("Exception while stopping the consumer: {}", e.toString());
-		}
-	}
-
-
-	@TestConfiguration
-	@Import(ApplicationConfiguration.class)
-	public static class Configuration
-	{
-		@Bean
-		KafkaProducer<String, Bytes> kafkaProducer(ApplicationProperties properties)
-		{
-			Properties props = new Properties();
-			props.put("bootstrap.servers", properties.getBootstrapServer());
-			props.put("linger.ms", 100);
-			props.put("key.serializer", StringSerializer.class.getName());
-			props.put("value.serializer", BytesSerializer.class.getName());
-
-			return new KafkaProducer<>(props);
-		}
-
-		@Bean
-		KafkaConsumer<Bytes, Bytes> offsetConsumer(ApplicationProperties properties)
-		{
-			Properties props = new Properties();
-			props.put("bootstrap.servers", properties.getBootstrapServer());
-			props.put("client.id", "OFFSET-CONSUMER");
-			props.put("group.id", properties.getGroupId());
-			props.put("key.deserializer", BytesDeserializer.class.getName());
-			props.put("value.deserializer", BytesDeserializer.class.getName());
-
-			return new KafkaConsumer<>(props);
-		}
-	}
-}
+  @Autowired
+  StateRepository stateRepository;
+
+
+  public ApplicationTests()
+  {
+    super(new ApplicationTestRecrodGenerator());
+    ((ApplicationTestRecrodGenerator) recordGenerator).tests = this;
+  }
+
+
+  static class ApplicationTestRecrodGenerator implements RecordGenerator
+  {
+    ApplicationTests tests;
+
+    final int[] numbers = {1, 77, 33, 2, 66, 666, 11};
+    final String[] dieWilden13 =
+      IntStream
+        .range(1, 14)
+        .mapToObj(i -> "seeräuber-" + i)
+        .toArray(i -> new String[i]);
+    final StringSerializer stringSerializer = new StringSerializer();
+    final Bytes calculateMessage = new Bytes(stringSerializer.serialize(TOPIC, "CALCULATE"));
+
+    int counter = 0;
+
+    Map<String, List<AdderResult>> state;
+
+    @Override
+    public int generate(
+      boolean poisonPills,
+      boolean logicErrors,
+      Consumer<ProducerRecord<Bytes, Bytes>> messageSender)
+    {
+      counter = 0;
+      state =
+        Arrays
+          .stream(dieWilden13)
+          .collect(Collectors.toMap(
+            seeräuber -> seeräuber,
+            seeräuber -> new LinkedList()));
+
+      int number[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
+      int message[] = {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1};
+      int next = 0;
+
+      for (int pass = 0; pass < 333; pass++)
+      {
+        for (int i = 0; i < 13; i++)
+        {
+          String seeräuber = dieWilden13[i];
+          Bytes key = new Bytes(stringSerializer.serialize(TOPIC, seeräuber));
+
+          if (message[i] > number[i])
+          {
+            send(key, calculateMessage, fail(logicErrors, pass, counter), messageSender);
+            state.get(seeräuber).add(new AdderResult(number[i], (number[i] + 1) * number[i] / 2));
+            // Pick next number to calculate
+            number[i] = numbers[next++ % numbers.length];
+            message[i] = 1;
+            log.debug("Seeräuber {} will die Summe für {} berechnen", seeräuber, number[i]);
+          }
+
+          Bytes value = new Bytes(stringSerializer.serialize(TOPIC, Integer.toString(message[i]++)));
+          send(key, value, fail(logicErrors, pass, counter), messageSender);
+        }
+      }
+
+      return counter;
+    }
+
+    boolean fail(boolean logicErrors, int pass, int counter)
+    {
+      return logicErrors && pass > 300 && counter % 77 == 0;
+    }
+
+    void send(
+      Bytes key,
+      Bytes value,
+      boolean fail,
+      Consumer<ProducerRecord<Bytes, Bytes>> messageSender)
+    {
+      counter++;
+
+      if (fail)
+      {
+        value = new Bytes(stringSerializer.serialize(TOPIC, Integer.toString(-1)));
+      }
+
+      messageSender.accept(new ProducerRecord<>(TOPIC, key, value));
+    }
+
+    @Override
+    public boolean canGeneratePoisonPill()
+    {
+      return false;
+    }
+
+    @Override
+    public void assertBusinessLogic()
+    {
+      for (int i = 0; i < PARTITIONS; i++)
+      {
+        StateDocument stateDocument =
+          tests.stateRepository.findById(Integer.toString(i)).get();
+
+        stateDocument
+          .results
+          .entrySet()
+          .stream()
+          .forEach(entry ->
+          {
+            String user = entry.getKey();
+            List<AdderResult> resultsForUser = entry.getValue();
+
+            for (int j = 0; j < resultsForUser.size(); j++)
+            {
+              if (!(j < state.get(user).size()))
+              {
+                break;
+              }
+
+              assertThat(resultsForUser.get(j))
+                .as("Unexpected results calculation %d of user %s", j, user)
+                .isEqualTo(state.get(user).get(j));
+            }
+
+            assertThat(state.get(user))
+              .as("More results calculated for user %s as expected", user)
+              .containsAll(resultsForUser);
+          });
+      }
+    }
+  }
+}
\ No newline at end of file