lucasbru commented on code in PR #14503:
URL: https://github.com/apache/kafka/pull/14503#discussion_r1356663540


##########
clients/src/test/java/org/apache/kafka/clients/consumer/internals/PrototypeAsyncConsumerTest.java:
##########
@@ -322,6 +323,25 @@ public void testOffsetsForTimesOnNullPartitions() {
                 Duration.ofMillis(1)));
     }
 
+    @Test
+    public void testOffsetsForTimesFailsOnNegativeTargetTimes() {
+        PrototypeAsyncConsumer<?, ?> consumer = newConsumer(time, new 
StringDeserializer(), new StringDeserializer());
+        assertThrows(IllegalArgumentException.class,
+                () -> consumer.offsetsForTimes(Collections.singletonMap(new 
TopicPartition(
+                                "topic1", 1), 
ListOffsetsRequest.EARLIEST_TIMESTAMP),
+                        Duration.ofMillis(1)));
+
+        assertThrows(IllegalArgumentException.class,
+                () -> consumer.offsetsForTimes(Collections.singletonMap(new 
TopicPartition(

Review Comment:
   Actually, under which circumstances would a user even use these constants? 
All uses seem to be internal, if I see correctly. Checking non-negative makes 
sense, just not sure why we are checking for these (internal?) constants 
specifically.



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