Antoine Pitrou created ARROW-7090:

             Summary: [C++] AssertFieldEqual (and friends) doesn't show 
metadata on failure
                 Key: ARROW-7090
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Antoine Pitrou

If two fields only differ by metadata the error message isn't very informative:
../src/arrow/testing/ Failure
left field: ints: int8 not null
right field: ints: int8 not null


Perhaps {{DataType::ToString}}, {{Field::ToString}} and {{Schema::ToString}} 
could get an optional flag to display metadata?

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