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Posted to issues@flink.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/01/08 10:58:00 UTC
[jira] [Commented] (FLINK-8306) FlinkKafkaConsumerBaseTest has
invalid mocks on final methods
[ https://issues.apache.org/jira/browse/FLINK-8306?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16316108#comment-16316108 ]
ASF GitHub Bot commented on FLINK-8306:
---------------------------------------
Github user pnowojski commented on a diff in the pull request:
https://github.com/apache/flink/pull/5200#discussion_r160107329
--- Diff: flink-connectors/flink-connector-kafka-base/src/test/java/org/apache/flink/streaming/connectors/kafka/FlinkKafkaConsumerBaseTest.java ---
@@ -89,30 +90,44 @@
@SuppressWarnings("unchecked")
public void testEitherWatermarkExtractor() {
try {
- new DummyFlinkKafkaConsumer<String>(mock(AbstractFetcher.class), mock(AbstractPartitionDiscoverer.class), false)
+ new DummyFlinkKafkaConsumer<String>(
+ mock(AbstractFetcher.class),
+ mock(AbstractPartitionDiscoverer.class),
+ mock(KafkaOffsetCommitter.class),
+ false)
.assignTimestampsAndWatermarks((AssignerWithPeriodicWatermarks<String>) null);
fail();
} catch (NullPointerException ignored) {}
try {
- new DummyFlinkKafkaConsumer<String>(mock(AbstractFetcher.class), mock(AbstractPartitionDiscoverer.class), false)
+ new DummyFlinkKafkaConsumer<String>(
+ mock(AbstractFetcher.class),
+ mock(AbstractPartitionDiscoverer.class),
+ mock(KafkaOffsetCommitter.class),
+ false)
.assignTimestampsAndWatermarks((AssignerWithPunctuatedWatermarks<String>) null);
fail();
} catch (NullPointerException ignored) {}
final AssignerWithPeriodicWatermarks<String> periodicAssigner = mock(AssignerWithPeriodicWatermarks.class);
final AssignerWithPunctuatedWatermarks<String> punctuatedAssigner = mock(AssignerWithPunctuatedWatermarks.class);
- DummyFlinkKafkaConsumer<String> c1 =
- new DummyFlinkKafkaConsumer<>(mock(AbstractFetcher.class), mock(AbstractPartitionDiscoverer.class), false);
+ DummyFlinkKafkaConsumer<String> c1 = new DummyFlinkKafkaConsumer<>(
+ mock(AbstractFetcher.class),
+ mock(AbstractPartitionDiscoverer.class),
+ mock(KafkaOffsetCommitter.class),
--- End diff --
Please replace everywhere `mock(KafkaOffsetCommitter.class)` with `new DummyKafkaOffsetCommitter()` or `new NoOpKafkaOffsetCommitter()`.
> FlinkKafkaConsumerBaseTest has invalid mocks on final methods
> -------------------------------------------------------------
>
> Key: FLINK-8306
> URL: https://issues.apache.org/jira/browse/FLINK-8306
> Project: Flink
> Issue Type: Bug
> Components: Kafka Connector, Tests
> Reporter: Tzu-Li (Gordon) Tai
> Assignee: Tzu-Li (Gordon) Tai
> Priority: Critical
> Fix For: 1.5.0, 1.4.1
>
>
> The {{FlinkKafkaConsumerBaseTest}} has invalid mocks on a final {{AbstractFetcher::commitInternalOffsetsToKafka(...)}} method. While an easy fix would be to simply make that method non-final, that is not ideal since it would be best that the method is left final to prevent overrides in subclasses.
> This suggests that offset committing functionality is too tightly coupled with the {{AbstractFetcher}}, making it hard to perform concise tests to verify offset committing.
> I suggest that we decouple record fetching and offset committing as separate services behind different interfaces. We should introduce a new interface, say {{KafkaOffsetCommitter}}, and test against that instead. Initially, we can simply let {{AbstractFetcher}} implement {{KafkaOffsetCommitter}}.
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