cadonna commented on code in PR #13927:
URL: https://github.com/apache/kafka/pull/13927#discussion_r1258012878
##########
streams/src/test/java/org/apache/kafka/streams/integration/NamedTopologyIntegrationTest.java:
##########
@@ -173,9 +173,9 @@ public static void closeCluster() {
private static final List<KeyValue<String, Long>> STANDARD_INPUT_DATA =
asList(pair("A", 100L), pair("B", 200L), pair("A", 300L), pair("C",
400L), pair("C", -50L));
private static final List<KeyValue<String, Long>> COUNT_OUTPUT_DATA =
- asList(pair("B", 1L), pair("A", 2L), pair("C", 2L)); // output of
count operation with caching
Review Comment:
@wcarlson5 Could you elaborate what is worrying you here?
I ran the tests with disabled state updater and the disabled cache and all
tests pass. That tells me that the state updater does not change any results.
Additionally, the results with enabled and disabled cache are semantically
equivalent.
```
pair("B", 1L), pair("A", 2L), pair("C", 2L)
```
is equivalent to
```
pair("A", 1L), pair("B", 1L), pair("A", 2L), pair("C", 1L), pair("C", 2L)
```
The latter just produces more intermediate results.
In general, if a test verifies the correctness of results, disabling the
cache makes the test more robust, because the results do not depend on commit
time intervals or production rates.
Let me know if I missed something here.
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