[ARROW-17226] [C++] Extend hash-join unit tests to cover both empty and length=0 batches

• Type: Improvement
• Status: Open
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 11.0.0
• Component/s: C++
• Labels: query-engine
• External issue URL: https://github.com/apache/arrow/issues/32514
• Assignee: Unassigned
• Reporter: Weston Pace
• Created: 27/Jul/22 14:41
• Updated: 11/Jan/23 11:49

Description

Follow-up to ARROW-15938 so that we can merge ARROW-15938 for the RC. This just adds the unit test requested in the review.