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https://issues.apache.org/jira/browse/FLINK-3656?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15346211#comment-15346211
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Timo Walther commented on FLINK-3656:
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Many tests can be converted in tests extending {{ExpressionTestBase}}.
> Rework Table API tests
> ----------------------
>
> Key: FLINK-3656
> URL: https://issues.apache.org/jira/browse/FLINK-3656
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Vasia Kalavri
>
> The Table API tests are very inefficient. At the moment It is mostly
> end-to-end integration tests, often testing the same functionality several
> times (Java/Scala, DataSet/DataStream).
> We should look into how we can rework the Table API tests such that:
> - long-running integration tests are converted into faster unit tests
> - common parts of DataSet and DataStream are only tested once
> - common parts of Java and Scala Table APIs are only tested once
> - duplicate tests are completely removed
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