juplo.de Git - demos/kafka/wordcount/blob - src/test/java/de/juplo/kafka/wordcount/top10/Top10StreamProcessorTopologyTest.java

   1 package de.juplo.kafka.wordcount.top10;
   2
   3 import lombok.extern.slf4j.Slf4j;
   4 import org.apache.kafka.streams.*;
   5 import org.apache.kafka.streams.state.Stores;
   6 import org.junit.jupiter.api.Test;
   7 import org.springframework.kafka.support.serializer.JsonDeserializer;
   8 import org.springframework.kafka.support.serializer.JsonSerde;
   9 import org.springframework.kafka.support.serializer.JsonSerializer;
  10
  11 import java.util.List;
  12 import java.util.Map;
  13 import java.util.Properties;
  14
  15 import static de.juplo.kafka.wordcount.counter.TestData.convertToMap;
  16 import static de.juplo.kafka.wordcount.counter.TestData.parseHeader;
  17 import static org.springframework.kafka.support.mapping.AbstractJavaTypeMapper.DEFAULT_CLASSID_FIELD_NAME;
  18 import static org.springframework.kafka.support.mapping.AbstractJavaTypeMapper.KEY_DEFAULT_CLASSID_FIELD_NAME;
  19
  20
  21 @Slf4j
  22 public class Top10StreamProcessorTopologyTest
  23 {
  24   public final static String IN = "TEST-IN";
  25   public final static String OUT = "TEST-OUT";
  26
  27   @Test
  28   public void test()
  29   {
  30     Topology topology = Top10StreamProcessor.buildTopology(IN, OUT);
  31
  32     Top10ApplicationConfiguriation applicationConfiguriation =
  33         new Top10ApplicationConfiguriation();
  34     Properties streamProcessorProperties =
  35         applicationConfiguriation.streamProcessorProperties(new CounterApplicationProperties());
  36     Map<String, Object> propertyMap = convertToMap(streamProcessorProperties);
  37
  38     JsonSerde<?> keySerde = new JsonSerde<>();
  39     keySerde.configure(propertyMap, true);
  40     JsonSerde<?> valueSerde = new JsonSerde<>();
  41     valueSerde.configure(propertyMap, false);
  42
  43     TopologyTestDriver testDriver = new TopologyTestDriver(topology, streamProcessorProperties);
  44
  45     TestInputTopic<String, Word> in = testDriver.createInputTopic(
  46         IN,
  47         (JsonSerializer<String>)keySerde.serializer(),
  48         (JsonSerializer<Word>)valueSerde.serializer());
  49
  50     TestOutputTopic<Word, WordCounter> out = testDriver.createOutputTopic(
  51         OUT,
  52         (JsonDeserializer<Word>)keySerde.deserializer(),
  53         (JsonDeserializer<WordCounter>)valueSerde.deserializer());
  54
  55     TestData.writeInputData((key, value) -> in.pipeInput(key, value));
  56
  57     List<KeyValue<Word, WordCounter>> receivedMessages = out
  58         .readRecordsToList()
  59         .stream()
  60         .map(record ->
  61         {
  62           log.debug(
  63               "OUT: {} -> {}, {}, {}",
  64               record.key(),
  65               record.value(),
  66               parseHeader(record.headers(), KEY_DEFAULT_CLASSID_FIELD_NAME),
  67               parseHeader(record.headers(), DEFAULT_CLASSID_FIELD_NAME));
  68           return KeyValue.pair(record.key(), record.value());
  69         })
  70         .toList();
  71
  72     TestData.assertExpectedResult(receivedMessages);
  73   }
  74 }