Jiabao-Sun commented on code in PR #23233:
URL: https://github.com/apache/flink/pull/23233#discussion_r1302527806


##########
flink-runtime/src/test/java/org/apache/flink/runtime/operators/util/BitSetTest.java:
##########
@@ -19,17 +19,20 @@
 
 import org.apache.flink.core.memory.MemorySegment;
 import org.apache.flink.core.memory.MemorySegmentFactory;
+import 
org.apache.flink.testutils.junit.extensions.parameterized.ParameterizedTestExtension;
+import org.apache.flink.testutils.junit.extensions.parameterized.Parameters;
 
-import org.junit.Before;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.Parameterized;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.TestTemplate;
+import org.junit.jupiter.api.extension.ExtendWith;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
+import java.util.Arrays;
+import java.util.List;
 
-@RunWith(Parameterized.class)
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+@ExtendWith(ParameterizedTestExtension.class)
 public class BitSetTest {

Review Comment:
   I'm afraid we can't change a `ParameterizedTestExtension`'s modifier to 
public now.
   It will cause exceptions.
   
   ```
   java.lang.IllegalStateException: Failed to invoke parameter provider
   
        at 
org.apache.flink.testutils.junit.extensions.parameterized.ParameterizedTestExtension.provideTestTemplateInvocationContexts(ParameterizedTestExtension.java:89)
        at 
org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.lambda$execute$0(TestTemplateTestDescriptor.java:106)
        at 
java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:267)
        at 
java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384)
        at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482)
        at 
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472)
        at 
java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151)
        at 
java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174)
        at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
        at 
java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:418)
        at 
org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:110)
        at 
org.junit.jupiter.engine.descriptor.TestTemplateTestDescriptor.execute(TestTemplateTestDescriptor.java:44)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at 
org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService$ExclusiveTask.compute(ForkJoinPoolHierarchicalTestExecutorService.java:185)
        at 
org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService.executeNonConcurrentTasks(ForkJoinPoolHierarchicalTestExecutorService.java:155)
        at 
org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService.invokeAll(ForkJoinPoolHierarchicalTestExecutorService.java:135)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at 
org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService$ExclusiveTask.compute(ForkJoinPoolHierarchicalTestExecutorService.java:185)
        at 
org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService.invokeAll(ForkJoinPoolHierarchicalTestExecutorService.java:129)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
        at 
org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
        at 
org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
        at 
org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
        at 
org.junit.platform.engine.support.hierarchical.ForkJoinPoolHierarchicalTestExecutorService$ExclusiveTask.compute(ForkJoinPoolHierarchicalTestExecutorService.java:185)
        at java.util.concurrent.RecursiveAction.exec(RecursiveAction.java:189)
        at 
java.util.concurrent.ForkJoinTask.doExec$$$capture(ForkJoinTask.java:289)
        at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java)
        at 
java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1067)
        at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1703)
        at 
java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:172)
   ```



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