cyb70289 commented on a change in pull request #12504:
URL: https://github.com/apache/arrow/pull/12504#discussion_r813512570



##########
File path: cpp/src/arrow/csv/writer_test.cc
##########
@@ -240,6 +241,10 @@ std::vector<WriterTestParams> GenerateTestCases() {
       reject_structural_params({nullptr, "a", nullptr, "c,d", nullptr, ",e", 
"f"}, "c,d"),
       reject_structural_params({"a", "b", nullptr, "c,d", nullptr, nullptr}, 
"c,d"),
       // exercise simd code with strings total length >= 16
+      {abc_schema, populated_batch,
+       DefaultTestOptions(/*include_header=*/false, "", 
QuotingStyle::AllValid, "\n", ',',
+                          /*batch_size=*/100),

Review comment:
       Process test data [1] as a single batch (batch_size > rows) so the 
string array size > 16.
   [1] 
https://github.com/apache/arrow/blob/master/cpp/src/arrow/csv/writer_test.cc#L101




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