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https://issues.apache.org/jira/browse/CALCITE-2462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16582148#comment-16582148
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Julian Hyde commented on CALCITE-2462:
--------------------------------------
Did you look at {{RexImplicationCheckerTest.Fixture}}? It isolates the
necessary methods and fields in a separate class from the test, it declares
fields final where possible, but can live on the stack so its life-cycle is
straightforward (better than {{@Before}}, in my opinion). Also, tests can
sub-class Fixture to add more things that they need.
> RexProgramTest: move "rex building" methods to base class
> ---------------------------------------------------------
>
> Key: CALCITE-2462
> URL: https://issues.apache.org/jira/browse/CALCITE-2462
> Project: Calcite
> Issue Type: Sub-task
> Components: core
> Affects Versions: 1.17.0
> Reporter: Vladimir Sitnikov
> Assignee: Julian Hyde
> Priority: Major
> Fix For: 1.18.0
>
>
> RexProgramTest is quite big (2000 lines now), and "easy to use" rex building
> is useful for many tests.
> So I suggest to move methods like {{gt}}, {{lt}}, etc to the base class, so
> multiple other tests can reuse it.
> Alternative option would be to use Kotlin for builders, yet I think Java
> tests will be there for quite a while, so it would be nice to simplify them
> as well.
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