Copilot commented on code in PR #8022:
URL: https://github.com/apache/hbase/pull/8022#discussion_r3031828690


##########
hbase-mapreduce/pom.xml:
##########
@@ -215,11 +215,6 @@
       <artifactId>junit-jupiter-params</artifactId>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.junit.vintage</groupId>
-      <artifactId>junit-vintage-engine</artifactId>
-      <scope>test</scope>
-    </dependency>
     <dependency>

Review Comment:
   With the removal of the vintage engine, this module still pulls in 
`hbase-server` test-jar classes (e.g., `TestReplicationBase`) that reference 
JUnit4 types (`org.junit.*` annotations/asserts). There is no explicit JUnit4 
API dependency here, so tests can fail at runtime with missing `org.junit.*` 
classes. Add an explicit `junit:junit` (JUnit4 API) test-scope dependency 
(without vintage) or remove JUnit4 references from the shared test base classes 
used by this module.
   ```suggestion
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <scope>test</scope>
       </dependency>
       <dependency>
   ```



##########
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/TestWALInputFormat.java:
##########
@@ -17,27 +17,31 @@
  */
 package org.apache.hadoop.hbase.mapreduce;
 
-import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import java.util.ArrayList;
 import java.util.List;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.LocatedFileStatus;
 import org.apache.hadoop.fs.Path;
-import org.apache.hadoop.hbase.HBaseClassTestRule;
+import org.apache.hadoop.hbase.HBaseTestingUtility;
 import org.apache.hadoop.hbase.testclassification.MapReduceTests;
-import org.apache.hadoop.hbase.testclassification.SmallTests;
 import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;
-import org.junit.ClassRule;
-import org.junit.Test;
-import org.junit.experimental.categories.Category;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Tag;
+import org.junit.jupiter.api.Test;
 import org.mockito.Mockito;
 
-@Category({ MapReduceTests.class, SmallTests.class })
+@Tag(MapReduceTests.TAG)
+@Tag(MediumTests.TAG)
 public class TestWALInputFormat {
-  @ClassRule
-  public static final HBaseClassTestRule CLASS_RULE =
-    HBaseClassTestRule.forClass(TestWALInputFormat.class);
+  private static final HBaseTestingUtility TEST_UTIL = new 
HBaseTestingUtility();
+
+  @BeforeAll
+  public static void setupClass() throws Exception {
+    TEST_UTIL.startMiniCluster();
+    TEST_UTIL.createWALRootDir();
+  }
 

Review Comment:
   `@Tag(MediumTests.TAG)` is used but `MediumTests` is neither imported nor in 
this class’s previous classification (it imported `SmallTests`). This will not 
compile. Either change the tag to `SmallTests.TAG` or add the correct 
`MediumTests` import and update the intent consistently.



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