m1a2st commented on code in PR #19570:
URL: https://github.com/apache/kafka/pull/19570#discussion_r2061398527


##########
streams/src/test/java/org/apache/kafka/streams/kstream/TimeWindowedDeserializerTest.java:
##########
@@ -97,34 +104,41 @@ public void 
shouldThrowErrorIfWindowSizeSetInConstructorConfigAndConstructor() {
         assertThrows(IllegalArgumentException.class, () -> 
timeWindowedDeserializer.configure(props, false));
     }
 
+    @Deprecated
     @Test
     public void 
shouldThrowErrorIfWindowSizeIsNotSetAndWindowedInnerClassSerdeIsSet() {
         props.put(StreamsConfig.WINDOWED_INNER_CLASS_SERDE, 
Serdes.ByteArraySerde.class.getName());
-        final TimeWindowedDeserializer<?> deserializer = new 
TimeWindowedDeserializer<>();
-        assertThrows(IllegalArgumentException.class, () -> 
deserializer.configure(props, false));
+        try (final TimeWindowedDeserializer<?> deserializer = new 
TimeWindowedDeserializer<>()) {
+            assertThrows(IllegalArgumentException.class, () -> 
deserializer.configure(props, false));
+        }
     }
 
     @Test
     public void 
shouldThrowErrorIfWindowSizeIsNotSetAndWindowedInnerDeserializerClassIsSet() {
-        props.put(TimeWindowedDeserializer.WINDOW_SIZE_MS_CONFIG, 
Serdes.ByteArraySerde.class.getName());
-        final TimeWindowedDeserializer<?> deserializer = new 
TimeWindowedDeserializer<>();
-        assertThrows(IllegalArgumentException.class, () -> 
deserializer.configure(props, false));
+        props.put(TimeWindowedDeserializer.WINDOWED_INNER_DESERIALIZER_CLASS, 
Serdes.ByteArraySerde.class.getName());

Review Comment:
   How about using `assertThrowsExactly` to ensure that only the expected 
exception type is thrown, without allowing subclasses?



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