counter: 1.3.1 - Refined `CounterStreamProcessor` (DRY for type-mapping)

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

diff --git a/src/test/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessorTopologyTest.java b/src/test/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessorTopologyTest.java
index 2c8bd1e..cfb6bd8 100644 (file)
--- a/src/test/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessorTopologyTest.java
+++ b/src/test/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessorTopologyTest.java
@@ -1,56 +1,111 @@
 package de.juplo.kafka.wordcount.counter;
 
-import org.apache.kafka.common.serialization.StringDeserializer;
-import org.apache.kafka.common.serialization.StringSerializer;
+import de.juplo.kafka.wordcount.splitter.TestInputUser;
+import de.juplo.kafka.wordcount.splitter.TestInputWord;
+import de.juplo.kafka.wordcount.top10.TestOutputWord;
+import de.juplo.kafka.wordcount.top10.TestOutputWordCounter;
+import lombok.extern.slf4j.Slf4j;
 import org.apache.kafka.streams.TestInputTopic;
 import org.apache.kafka.streams.TestOutputTopic;
 import org.apache.kafka.streams.Topology;
 import org.apache.kafka.streams.TopologyTestDriver;
+import org.apache.kafka.streams.state.KeyValueStore;
 import org.apache.kafka.streams.state.Stores;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
+import org.springframework.kafka.support.serializer.JsonDeserializer;
+import org.springframework.kafka.support.serializer.JsonSerializer;
+import org.springframework.util.LinkedMultiValueMap;
+import org.springframework.util.MultiValueMap;
 
-import java.util.List;
-import java.util.Properties;
+import java.util.Map;
 
+import static de.juplo.kafka.wordcount.counter.CounterApplicationConfiguriation.serializationConfig;
+import static de.juplo.kafka.wordcount.counter.CounterStreamProcessor.STORE_NAME;
 
+
+@Slf4j
 public class CounterStreamProcessorTopologyTest
 {
-  public final static String IN = "TEST-IN";
-  public final static String OUT = "TEST-OUT";
+  public static final String IN = "TEST-IN";
+  public static final String OUT = "TEST-OUT";
 
-  @Test
-  public void test()
+
+  TopologyTestDriver testDriver;
+  TestInputTopic<TestInputUser, TestInputWord> in;
+  TestOutputTopic<TestOutputWord, TestOutputWordCounter> out;
+
+
+  @BeforeEach
+  public void setUpTestDriver()
   {
     Topology topology = CounterStreamProcessor.buildTopology(
         IN,
         OUT,
-        Stores.inMemoryKeyValueStore("TOPOLOGY-TEST"));
+        Stores.inMemoryKeyValueStore(STORE_NAME));
 
-    CounterApplicationConfiguriation config =
-        new CounterApplicationConfiguriation();
-    Properties properties =
-        config.propertyMap(new CounterApplicationProperties());
+    testDriver = new TopologyTestDriver(topology, serializationConfig());
 
-    TopologyTestDriver testDriver = new TopologyTestDriver(topology, properties);
+    in = testDriver.createInputTopic(IN, serializer(), serializer());
+    out = testDriver.createOutputTopic(OUT, keyDeserializer(), valueDeserializer());
+  }
 
-    TestInputTopic<String, String> in = testDriver.createInputTopic(
-        IN,
-        new StringSerializer(),
-        new StringSerializer());
 
-    TestOutputTopic<String, String> out = testDriver.createOutputTopic(
-        OUT,
-        new StringDeserializer(),
-        new StringDeserializer());
-
-    TestData.writeInputData((key, value) -> in.pipeInput(key, value));
+  @Test
+  public void test()
+  {
+    TestData
+        .getInputMessages()
+        .forEach(kv -> in.pipeInput(kv.key, kv.value));
 
-    List<Message> receivedMessages = out
+    MultiValueMap<TestOutputWord, TestOutputWordCounter> receivedMessages = new LinkedMultiValueMap<>();
+    out
         .readRecordsToList()
-        .stream()
-        .map(record -> Message.of(record.key(), record.value()))
-        .toList();
+        .forEach(record -> receivedMessages.add(record.key(), record.value()));
+
+    TestData.assertExpectedMessages(receivedMessages);
+
+    TestData.assertExpectedNumberOfMessagesForWord(receivedMessages);
+    TestData.assertExpectedLastMessagesForWord(receivedMessages);
+
+    KeyValueStore<Word, Long> store = testDriver.getKeyValueStore(STORE_NAME);
+    TestData.assertExpectedState(store);
+  }
 
-    TestData.assertExpectedResult(receivedMessages);
+  @AfterEach
+  public void tearDown()
+  {
+    testDriver.close();
+  }
+
+
+  private static JsonSerializer serializer()
+  {
+    return new JsonSerializer().noTypeInfo();
+  }
+
+  private JsonDeserializer<TestOutputWord> keyDeserializer()
+  {
+    return deserializer(true);
+  }
+
+  private static JsonDeserializer<TestOutputWordCounter> valueDeserializer()
+  {
+    return deserializer(false);
+  }
+
+  private static <T> JsonDeserializer<T> deserializer(boolean isKey)
+  {
+    JsonDeserializer<T> deserializer = new JsonDeserializer<>();
+    deserializer.configure(
+        Map.of(JsonDeserializer.TYPE_MAPPINGS, typeMappingsConfig()),
+        isKey);
+    return deserializer;
+  }
+
+  private static String typeMappingsConfig()
+  {
+    return CounterStreamProcessor.typeMappingsConfig(TestOutputWord.class, TestOutputWordCounter.class);
   }
 }