hlteoh37 commented on code in PR #190:
URL:
https://github.com/apache/flink-connector-aws/pull/190#discussion_r1979590842
##########
flink-connector-aws/flink-connector-dynamodb/src/test/java/org/apache/flink/connector/dynamodb/source/reader/PollingDynamoDbStreamsShardSplitReaderTest.java:
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@@ -320,10 +336,103 @@ record ->
for (int i = 0; i < 10; i++) {
RecordsWithSplitIds<Record> records = splitReader.fetch();
fetchedRecords.addAll(readAllRecords(records));
+ Thread.sleep(NON_EMPTY_POLLING_DELAY_MILLIS.toMillis());
}
assertThat(fetchedRecords).containsExactly(recordsFromSplit3.toArray(new
Record[0]));
}
+ @Test
+ void testPollingDelayForEmptyRecords() throws Exception {
+ // Given assigned split with no records
+ testStreamProxy.addShards(TEST_SHARD_ID);
+ splitReader.handleSplitsChanges(
+ new
SplitsAddition<>(Collections.singletonList(getTestSplit(TEST_SHARD_ID))));
+
+ // First poll - should return empty records
+ RecordsWithSplitIds<Record> firstPoll = splitReader.fetch();
+ assertThat(firstPoll.nextRecordFromSplit()).isNull();
+ assertThat(firstPoll.nextSplit()).isNull();
+ assertThat(firstPoll.finishedSplits()).isEmpty();
+
+ // Immediate second poll - should return empty due to polling delay
Review Comment:
I just meant let's make sure we ensure that this test is not flaky if we run
on a slow host
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