[jira] [Created] (DRILL-5318) Create a sub-operator test framework

["Paul Rogers (JIRA)" <ji...@apache.org>]

Paul Rogers created DRILL-5318:
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             Summary: Create a sub-operator test framework
                 Key: DRILL-5318
                 URL: https://issues.apache.org/jira/browse/DRILL-5318
             Project: Apache Drill
          Issue Type: Improvement
          Components: Tools, Build & Test
    Affects Versions: 1.10.0
            Reporter: Paul Rogers
            Assignee: Paul Rogers
             Fix For: Future


Drill provides two unit test frameworks for whole-server, SQL-based testing: the original {{BaseTestQuery}} and the newer {{ClusterFixture}}. Both use the {{TestBuilder}} mechanism to build system-level functional tests that run queries and check results.

Jason provided an operator-level test framework based, in part on mocks: 

As Drill operators become more complex, we have a crying need for true unit-level tests at a level below the whole system and below operators. That is, we need to test the individual pieces that, together, form the operator.

This umbrella ticket includes a number of tasks needed to create the sub-operator framework. Our intention is that, over time, as we find the need to revisit existing operators, or create new ones, we can employ the sub-operator test framework to exercise code at a finer granularity than is possible prior to this framework.



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