Github user rmetzger commented on the pull request:
https://github.com/apache/incubator-flink/pull/141#issuecomment-57940493
Thank you for the thorough review. I'll address the issues.
Regarding the serializer test, there is the `PojoSerializerTest extends
SerializerTestBase<PojoSerializerTest.TestUserClass>`. It is doing 12 tests
(copy, instantiation, etc).
I'll look into the Tuple Serializer tests and see what I can do for the
PojoSerializer. But there are definitively tests for the comparator missing.
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