Ben Kietzman created ARROW-9135:
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Summary: [C++][Compute] Provide a kernel property testing API
Key: ARROW-9135
URL: https://issues.apache.org/jira/browse/ARROW-9135
Project: Apache Arrow
Issue Type: Bug
Components: C++
Affects Versions: 0.17.1
Reporter: Ben Kietzman
See discussion https://github.com/apache/arrow/pull/7410#discussion_r439704017
Testing against random data fuzzes kernel implementations and provides sanity
checks across a wide swath of parameter space with minimal configuration.
Currently our random tests have a lot of boilerplate for generating the inputs
and a lot of ad-hoc code for computing the expected values. It might be
worthwhile to have an interface for specifying randomized tests more uniformly.
Since kernels provide introspection of their input and output types we can
generate inputs of those types (both scalar and array). For ScalarFunctions, a
function with signature {{Result<std::shared_ptr<Scalar>>(const ScalarVector&
args, const FunctionOptions*)}} will be sufficient to specify the expected
behavior, and the expected output can be generated by applying that
specification to the broadcast inputs.
Example impl
https://github.com/apache/arrow/pull/7410/commits/908504810ee9332f651cceb33a8b40f253383efe
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