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Posted to github@arrow.apache.org by GitBox <gi...@apache.org> on 2021/08/17 14:54:52 UTC

[GitHub] [arrow] rok commented on a change in pull request #10647: ARROW-13174: [C++][Compute] Add strftime kernel

rok commented on a change in pull request #10647:
URL: https://github.com/apache/arrow/pull/10647#discussion_r690452017



##########
File path: cpp/src/arrow/compute/kernels/scalar_temporal_test.cc
##########
@@ -382,5 +382,75 @@ TEST_F(ScalarTemporalTest, DayOfWeek) {
                 DayOfWeek(timestamps, DayOfWeekOptions(/*one_based_numbering=*/false,
                                                        /*week_start=*/8)));
 }
+
+#ifndef _WIN32
+TEST_F(ScalarTemporalTest, Strftime) {
+  auto options_default = StrftimeOptions();
+  auto options = StrftimeOptions("%Y-%m-%dT%H:%M:%S%z");
+
+  const char* seconds = R"(["1970-01-01T00:00:59", null])";
+  const char* milliseconds = R"(["1970-01-01T00:00:59.123", null])";
+  const char* microseconds = R"(["1970-01-01T00:00:59.123456", null])";
+  const char* nanoseconds = R"(["1970-01-01T00:00:59.123456789", null])";
+
+  const char* default_seconds = R"(["1970-01-01T00:00:59Z", null])";
+  const char* string_seconds = R"(["1970-01-01T00:00:59+0000", null])";
+  const char* string_milliseconds = R"(["1970-01-01T00:00:59.123+0000", null])";
+  const char* string_microseconds = R"(["1970-01-01T05:30:59.123456+0530", null])";
+  const char* string_nanoseconds = R"(["1969-12-31T14:00:59.123456789-1000", null])";
+
+  CheckScalarUnary("strftime", timestamp(TimeUnit::SECOND, "UTC"), seconds, utf8(),
+                   default_seconds, &options_default);
+  CheckScalarUnary("strftime", timestamp(TimeUnit::SECOND, "UTC"), seconds, utf8(),
+                   string_seconds, &options);
+  CheckScalarUnary("strftime", timestamp(TimeUnit::MILLI, "GMT"), milliseconds, utf8(),
+                   string_milliseconds, &options);
+  CheckScalarUnary("strftime", timestamp(TimeUnit::MICRO, "Asia/Kolkata"), microseconds,
+                   utf8(), string_microseconds, &options);
+  CheckScalarUnary("strftime", timestamp(TimeUnit::NANO, "US/Hawaii"), nanoseconds,
+                   utf8(), string_nanoseconds, &options);
+
+  auto naive_times = ArrayFromJSON(timestamp(TimeUnit::SECOND), seconds);
+  ASSERT_RAISES(Invalid, Strftime(naive_times, options_default));
+  ASSERT_RAISES(Invalid, Strftime(naive_times, options));
+}
+
+TEST_F(ScalarTemporalTest, StrftimeWithLocale) {
+  auto options_default = StrftimeOptions();
+  auto options = StrftimeOptions("%Y-%m-%dT%H:%M:%S%z", "C");
+  auto options_locale_specific = StrftimeOptions("%a", "C");

Review comment:
       Please note this is only testing for `C` locale because that is all that is available in CI at the moment. Ideally we would cover several.




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