cadonna commented on code in PR #16092:
URL: https://github.com/apache/kafka/pull/16092#discussion_r1618662035


##########
streams/src/test/java/org/apache/kafka/streams/StreamsConfigTest.java:
##########
@@ -1579,6 +1579,27 @@ public void 
shouldDisableMetricCollectionOnMainConsumerOnly() {
         );
     }
 
+    @Test
+    public void shouldGetDefaultValueProcessingExceptionHandler() {
+        final StreamsConfig streamsConfig = new StreamsConfig(props);
+
+        
assertEquals("org.apache.kafka.streams.errors.LogAndFailProcessingExceptionHandler",
   streamsConfig.processingExceptionHandler().getClass().getName());
+    }
+
+    @Test
+    public void shouldOverrideDefaultProcessingExceptionHandler() {
+        props.put(StreamsConfig.PROCESSING_EXCEPTION_HANDLER_CLASS_CONFIG, 
"org.apache.kafka.streams.errors.LogAndContinueProcessingExceptionHandler");
+        final StreamsConfig streamsConfig = new StreamsConfig(props);
+
+        
assertEquals("org.apache.kafka.streams.errors.LogAndContinueProcessingExceptionHandler",
   streamsConfig.processingExceptionHandler().getClass().getName());
+    }
+
+    @Test
+    public void testInvalidProcessingExceptionHandler() {
+        props.put(StreamsConfig.PROCESSING_EXCEPTION_HANDLER_CLASS_CONFIG, 
"org.apache.kafka.streams.errors.InvalidProcessingExceptionHandler");
+        assertThrows(ConfigException.class, () -> new StreamsConfig(props));

Review Comment:
   Could you please also verify the message?
   ```suggestion
           final Exception exception = assertThrows(ConfigException.class, () 
-> new StreamsConfig(props));
           assertThat(
               exception.getMessage(),
               containsString("<the message to verify>")
           );
   ```



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