mumrah commented on code in PR #15702:
URL: https://github.com/apache/kafka/pull/15702#discussion_r1672784230


##########
metadata/src/main/java/org/apache/kafka/controller/ReplicationControlManager.java:
##########
@@ -2225,9 +2250,14 @@ private void 
listReassigningTopic(ListPartitionReassignmentsResponseData respons
     }
 
     // Visible to test.
-    int getTopicEffectiveMinIsr(String topicName) {
+    int getTopicEffectiveMinIsr(String topicName, Function<String, String> 
getTopicMinIsrConfig) {
         int currentMinIsr = defaultMinIsr;
-        String minIsrConfig = configurationControl.getTopicConfig(topicName, 
MIN_IN_SYNC_REPLICAS_CONFIG);
+        String minIsrConfig;
+        if (getTopicMinIsrConfig == null) {

Review Comment:
   Can we split the method into two signatures instead of having the null?
   
   E.g., `int getTopicEffectiveMinIsr(String topicName)` and `int 
getTopicEffectiveMinIsr(String topicName, Function<String, String> 
getTopicMinIsrConfig)`



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