Copilot commented on code in PR #19876:
URL: https://github.com/apache/druid/pull/19876#discussion_r3717412916


##########
extensions-core/lookups-cached-single/src/test/java/org/apache/druid/server/lookup/PollingLookupSerDeserTest.java:
##########
@@ -41,40 +40,40 @@
 import java.util.Map;
 
 
-@RunWith(Parameterized.class)
 public class PollingLookupSerDeserTest
 {
-  @Parameterized.Parameters
   public static Collection<Object[]> inputData()
   {
     return Arrays.asList(new Object[][]{
         {new OffHeapPollingCache.OffHeapPollingCacheProvider()}, {new 
OnHeapPollingCache.OnHeapPollingCacheProvider<>()}
     });
   }
 
-  private final PollingCacheFactory cacheFactory;
+  private PollingCacheFactory cacheFactory;
   private final DataFetcher dataFetcher = new MockDataFetcher();
 
-  public PollingLookupSerDeserTest(PollingCacheFactory cacheFactory)
+  public void initPollingLookupSerDeserTest(PollingCacheFactory cacheFactory)
   {
     this.cacheFactory = cacheFactory;
   }
 
-  @Test
-  public void testSerDeser() throws IOException
+  @MethodSource("inputData")
+  @ParameterizedTest
+  public void testSerDeser(PollingCacheFactory cacheFactory) throws IOException
   {
+    initPollingLookupSerDeserTest(cacheFactory);
     ObjectMapper mapper = new DefaultObjectMapper();
     PollingLookupFactory pollingLookupFactory = new 
PollingLookupFactory(Period.ZERO, dataFetcher, cacheFactory);
     mapper.registerSubtypes(MockDataFetcher.class);
     mapper.registerSubtypes(PollingLookupFactory.class);
-    Assert.assertEquals(pollingLookupFactory, 
mapper.readerFor(LookupExtractorFactory.class).readValue(mapper.writeValueAsString(pollingLookupFactory)));
+    Assertions.assertEquals(pollingLookupFactory, 
mapper.readerFor(LookupExtractorFactory.class).readValue(mapper.writeValueAsString(pollingLookupFactory)));
   }
 
   @JsonTypeName("mock")
   private static class MockDataFetcher implements DataFetcher
   {
     @JsonCreator
-    public MockDataFetcher()
+    public void initPollingLookupSerDeserTest()
     {
     }

Review Comment:
   `@JsonCreator` is applied to an instance void method, which Jackson will not 
treat as a creator (creator must be a constructor or a static factory returning 
the type). This will break compilation/serde for `MockDataFetcher` subtype 
registration.



##########
extensions-core/hdfs-storage/pom.xml:
##########
@@ -106,9 +106,24 @@
         </dependency>
 
         <!-- Tests -->
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter</artifactId>
+            <scope>test</scope>
+        </dependency>

Review Comment:
   The newly added JUnit dependency block has inconsistent indentation compared 
to surrounding dependencies in this POM.



##########
extensions-core/parquet-extensions/pom.xml:
##########
@@ -127,10 +127,25 @@
       <groupId>com.github.rvesse</groupId>
       <artifactId>airline</artifactId>
       <scope>provided</scope>
+    </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter</artifactId>
+      <scope>test</scope>
+    </dependency>

Review Comment:
   The newly added JUnit dependency block has inconsistent indentation compared 
to the rest of the POM, making the diff noisy and harder to read.



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