Yunyung commented on code in PR #20108:
URL: https://github.com/apache/kafka/pull/20108#discussion_r2190901473


##########
test-common/test-common-runtime/src/main/java/org/apache/kafka/common/test/ClusterInstance.java:
##########
@@ -288,6 +331,14 @@ default void deleteTopic(String topicName) throws 
InterruptedException {
     void waitForReadyBrokers() throws InterruptedException;
 
     default void waitForTopic(String topic, int partitions) throws 
InterruptedException {
+        if (partitions < 0) {
+            throw new IllegalArgumentException("Partition count must be >= 0, 
but was " + partitions);
+        }
+
+        else if(partitions == 0){
+            waitTopicDeletion(topic);
+        }
+
         // wait for metadata
         Collection<KafkaBroker> brokers = aliveBrokers().values();
         TestUtils.waitForCondition(

Review Comment:
   If you do that, calling waitTopicDeletion (without calling waitForTopic) 
directly won’t work. You can think about better ways to organize the code.



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