ARROW-15936 [Ruby] Add test for Arrow::DictionaryArray#raw_records

[okadakk]

I added test for Arrow::DictionaryArray#raw_records.

[github-actions]

https://issues.apache.org/jira/browse/ARROW-15936

[github-actions]

⚠️ Ticket has not been started in JIRA, please click 'Start Progress'.

[kou]

Umm. This dictionary isn't a dictionary.

For example, Arrow::NullArray.new(records.flatten) in build(Arrow::NullArray.new(records.flatten), records) isn't a dictionary.

How about something like the following?

def build_record_batch(array)
  dictionary = array.dictionary_encode
  schema = Arrow::Schema.new(column: dictionary.value_data_type)
  Arrow::RecordBatch.new(schema, array.length, [dictionary])
end

target = build(Arrow::NullArray.new(records.collect(&:first)))

[kou]

+1

[okadakk]

thanks! Sorry for the late reaction...

[kou]

No problem! But please mention me when a pull request can be reviewed again.

[ursabot]

Benchmark runs are scheduled for baseline = dc39f83 and contender = 79810a5. 79810a5 is a master commit associated with this PR. Results will be available as each benchmark for each run completes.
Conbench compare runs links:
[Finished ⬇️0.0% ⬆️0.0%] ec2-t3-xlarge-us-east-2
[Failed ⬇️1.05% ⬆️0.0%] test-mac-arm
[Failed ⬇️0.37% ⬆️0.0%] ursa-i9-9960x
[Finished ⬇️0.16% ⬆️0.04%] ursa-thinkcentre-m75q
Buildkite builds:
[Finished] 79810a54 ec2-t3-xlarge-us-east-2
[Failed] 79810a54 test-mac-arm
[Failed] 79810a54 ursa-i9-9960x
[Finished] 79810a54 ursa-thinkcentre-m75q
[Finished] dc39f83e ec2-t3-xlarge-us-east-2
[Failed] dc39f83e test-mac-arm
[Failed] dc39f83e ursa-i9-9960x
[Finished] dc39f83e ursa-thinkcentre-m75q
Supported benchmarks:
ec2-t3-xlarge-us-east-2: Supported benchmark langs: Python, R. Runs only benchmarks with cloud = True
test-mac-arm: Supported benchmark langs: C++, Python, R
ursa-i9-9960x: Supported benchmark langs: Python, R, JavaScript
ursa-thinkcentre-m75q: Supported benchmark langs: C++, Java