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https://issues.apache.org/jira/browse/ARROW-4673?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16790626#comment-16790626
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Francois Saint-Jacques commented on ARROW-4673:
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We will need `ToString` methods for every sub-objects to use Matchers. A second
note on this, while debugging it's _very_ handy if the Matcher can pin-point
the exact reason, e.g. row, where the miss-match happens.
> [C++] Implement AssertDatumEquals
> ---------------------------------
>
> Key: ARROW-4673
> URL: https://issues.apache.org/jira/browse/ARROW-4673
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Francois Saint-Jacques
> Assignee: Francois Saint-Jacques
> Priority: Minor
> Fix For: 0.14.0
>
>
> Aggregate tests could benefit from this.
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