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Posted to issues@arrow.apache.org by "Kazuaki Ishizaki (Jira)" <ji...@apache.org> on 2020/04/15 09:11:00 UTC
[jira] [Assigned] (ARROW-8467) [C++] Test cases using ArrayFromJSON
assume only a little-endian platform
[ https://issues.apache.org/jira/browse/ARROW-8467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Kazuaki Ishizaki reassigned ARROW-8467:
---------------------------------------
Assignee: Kazuaki Ishizaki
> [C++] Test cases using ArrayFromJSON assume only a little-endian platform
> -------------------------------------------------------------------------
>
> Key: ARROW-8467
> URL: https://issues.apache.org/jira/browse/ARROW-8467
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Kazuaki Ishizaki
> Assignee: Kazuaki Ishizaki
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> Test cases using ArrayFromJSON assumes little endian platform
> The following test cases seem to assume little-endian platform.
> TEST_F(TestChunkedArray, View) at https://github.com/apache/arrow/blob/master/cpp/src/arrow/table_test.cc#L175
> TEST(TestArrayView, PrimitiveAsFixedSizeBinary) at https://github.com/apache/arrow/blob/master/cpp/src/arrow/array_view_test.cc#L105
> TEST(TestArrayView, StructAsStructSimple) at https://github.com/apache/arrow/blob/master/cpp/src/arrow/array_view_test.cc#L126
> TEST(TestArrayView, ExtensionType) at https://github.com/apache/arrow/blob/master/cpp/src/arrow/array_view_test.cc
> One of examples is {{PrimitiveAsFixedSizeBinary}}.
> {code}
> TEST(TestArrayView, PrimitiveAsFixedSizeBinary) {
> auto arr = ArrayFromJSON(int32(), "[2020568934, 2054316386, null]");
> auto expected = ArrayFromJSON(fixed_size_binary(4), R"(["foox", "barz", null])");
> CheckView(arr, expected);
> CheckView(expected, arr);
> }
> {code}
> The expected strings are represented in binary as follows:
> {code}
> "foox" = [0x66 0x6f 0x6f 0x78]
> "barz" = [0x62 0x61 0x72 0x7a]
> {code}
> This test gives a value as raw int32. The current values assume only a little-endian platform as follows to generate the expected binary sequence.
> {code}
> 2020568934 = 0x786f6f66
> 2054316386 = 0x7a726162
> {code}
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