juplo.de Git - demos/kafka/wordcount/blob - src/test/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessorTopologyTest.java

   1 package de.juplo.kafka.wordcount.counter;
   2
   3 import org.apache.kafka.common.serialization.StringDeserializer;
   4 import org.apache.kafka.common.serialization.StringSerializer;
   5 import org.apache.kafka.streams.TestInputTopic;
   6 import org.apache.kafka.streams.TestOutputTopic;
   7 import org.apache.kafka.streams.Topology;
   8 import org.apache.kafka.streams.TopologyTestDriver;
   9 import org.apache.kafka.streams.state.Stores;
  10 import org.junit.jupiter.api.Test;
  11 import org.springframework.kafka.support.serializer.JsonSerializer;
  12
  13 import java.util.List;
  14 import java.util.Properties;
  15
  16
  17 public class CounterStreamProcessorTopologyTest
  18 {
  19   public final static String IN = "TEST-IN";
  20   public final static String OUT = "TEST-OUT";
  21
  22   @Test
  23   public void test()
  24   {
  25     Topology topology = CounterStreamProcessor.buildTopology(
  26         IN,
  27         OUT,
  28         Stores.inMemoryKeyValueStore("TOPOLOGY-TEST"));
  29
  30     CounterApplicationConfiguriation applicationConfiguriation =
  31         new CounterApplicationConfiguriation();
  32     Properties streamProcessorProperties =
  33         applicationConfiguriation.streamProcessorProperties(new CounterApplicationProperties());
  34
  35     TopologyTestDriver testDriver = new TopologyTestDriver(topology, streamProcessorProperties);
  36
  37     TestInputTopic<String, Word> in = testDriver.createInputTopic(
  38         IN,
  39         new JsonSerializer<>(),
  40         new JsonSerializer<>());
  41
  42     TestOutputTopic<String, String> out = testDriver.createOutputTopic(
  43         OUT,
  44         new StringDeserializer(),
  45         new StringDeserializer());
  46
  47     TestData.writeInputData((key, value) -> in.pipeInput(key, value));
  48
  49     List<Message> receivedMessages = out
  50         .readRecordsToList()
  51         .stream()
  52         .map(record -> Message.of(record.key(), record.value()))
  53         .toList();
  54
  55     TestData.assertExpectedResult(receivedMessages);
  56   }
  57 }