[ARROW-12723] [C++][Compute] GroupBy: add unittests for individual components of hash group by

• Type: Improvement
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 4.0.0
• Component/s: C++
• External issue URL: https://github.com/apache/arrow/issues/28466
• Assignee: Unassigned
• Reporter: Michal Nowakiewicz
• Created: 10/May/21 17:56
• Updated: 11/Jan/23 08:28

Description

Add unit tests directly verifying individual building blocks of hash group by:

• hash calculation
• bit utilities introduced by hash group by
• comparison
• hash table core
• encoding and decoding of column-oriented data to row-oriented format

Issue Links

• is a child of: ARROW-12633 [C++] Query engine umbrella issue