frankvicky commented on code in PR #16227:
URL: https://github.com/apache/kafka/pull/16227#discussion_r1630620777


##########
clients/src/test/java/org/apache/kafka/clients/consumer/ConsumerRecordsTest.java:
##########
@@ -59,4 +50,47 @@ public void iterator() throws Exception {
         }
         assertEquals(2, c);
     }
+
+    @Test
+    public void testRecordsWithNullTopic() {
+        String nullTopic = null;
+        Map<TopicPartition, List<ConsumerRecord<Integer, String>>> records = 
new LinkedHashMap<>();
+        ConsumerRecords<Integer, String> consumerRecords = new 
ConsumerRecords<>(records);
+        IllegalArgumentException exception = 
assertThrows(IllegalArgumentException.class, () -> 
consumerRecords.records(nullTopic));
+        assertEquals("Topic must be non-null.", exception.getMessage());
+    }
+
+    @Test
+    public void testRecords() {
+        String targetTopic = "topic";
+        Map<TopicPartition, List<ConsumerRecord<Integer, String>>> records = 
buildTestRecordsWithDummyRecords(targetTopic);

Review Comment:
   Sure, will do it 😸 



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