counter: 1.3.1 - Refined `CounterStreamProcessorTopologyTest`

[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 a1b4c7f..06a0798 100644 (file)
--- a/src/test/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessorTopologyTest.java
+++ b/src/test/java/de/juplo/kafka/wordcount/counter/CounterStreamProcessorTopologyTest.java
@@ -1,14 +1,15 @@
 package de.juplo.kafka.wordcount.counter;
 
+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.common.serialization.StringSerializer;
 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;
@@ -18,18 +19,22 @@ import org.springframework.kafka.support.serializer.JsonSerializer;
 import org.springframework.util.LinkedMultiValueMap;
 import org.springframework.util.MultiValueMap;
 
+import java.util.Map;
+import java.util.stream.Collectors;
+
 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";
 
 
   TopologyTestDriver testDriver;
-  TestInputTopic<String, TestInputWord> in;
+  TestInputTopic<TestInputUser, TestInputWord> in;
   TestOutputTopic<TestOutputWord, TestOutputWordCounter> out;
 
 
@@ -39,23 +44,12 @@ public class CounterStreamProcessorTopologyTest
     Topology topology = CounterStreamProcessor.buildTopology(
         IN,
         OUT,
-        Stores.inMemoryKeyValueStore("TOPOLOGY-TEST"));
+        Stores.inMemoryKeyValueStore(STORE_NAME));
 
     testDriver = new TopologyTestDriver(topology, serializationConfig());
 
-    in = testDriver.createInputTopic(
-        IN,
-        new StringSerializer(),
-        new JsonSerializer().noTypeInfo());
-
-    out = testDriver.createOutputTopic(
-        OUT,
-        new JsonDeserializer()
-            .copyWithType(TestOutputWord.class)
-            .ignoreTypeHeaders(),
-        new JsonDeserializer()
-            .copyWithType(TestOutputWordCounter.class)
-            .ignoreTypeHeaders());
+    in = testDriver.createInputTopic(IN, serializer(), serializer());
+    out = testDriver.createOutputTopic(OUT, keyDeserializer(), valueDeserializer());
   }
 
 
@@ -72,6 +66,12 @@ public class CounterStreamProcessorTopologyTest
         .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);
   }
 
   @AfterEach
@@ -79,4 +79,45 @@ public class CounterStreamProcessorTopologyTest
   {
     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 typeMappings()
+        .entrySet()
+        .stream()
+        .map(entry -> entry.getKey() + ":" + entry.getValue().getName())
+        .collect(Collectors.joining(","));
+  }
+
+  private static Map<String, Class> typeMappings()
+  {
+    return Map.of(
+        "word", TestOutputWord.class,
+        "counter", TestOutputWordCounter.class);
+  }
 }