Paul Rogers created DRILL-5325:
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Summary: Implement sub-opertor unit tests for managed external sort
Key: DRILL-5325
URL: https://issues.apache.org/jira/browse/DRILL-5325
Project: Apache Drill
Issue Type: Sub-task
Affects Versions: 1.11.0
Reporter: Paul Rogers
Assignee: Paul Rogers
Fix For: 1.11.0
Validate the proposed sub-operator test framework, by creating low-level unit
tests for the managed version of the external sort.
The external sort has a small number of existing tests, but those tests are
quite superficial; the "managed sort" project found many bugs. The managed sort
itself was tested with ad-hoc system-level tests created using the new "cluster
fixture" framework. But, again, such tests could not reach deep inside the sort
code to exercise very specific conditions.
As a result, we spent far too much time using QA functional tests to identify
specific code issues.
Using the sub-opeator unit test framework, we can instead test each bit of
functionality at the unit test level.
If doing so works, and is practical, it can serve as a model for other operator
testing projects.
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