thisisnic commented on a change in pull request #12431:
URL: https://github.com/apache/arrow/pull/12431#discussion_r811289144
##########
File path: r/tests/testthat/test-dplyr-funcs-datetime.R
##########
@@ -711,3 +711,40 @@ test_that("am/pm mirror lubridate", {
)
})
+test_that("dst extracts daylight savings time correctly", {
+ test_df <- tibble(
+ dates = as.POSIXct(c("2021-02-20", "2021-07-31", "2021-10-31",
"2021-01-31"), tz = "Europe/London")
+ )
+ # https://issues.apache.org/jira/browse/ARROW-13168
+ skip_on_os("windows")
+
+ compare_dplyr_binding(
+ .input %>%
+ mutate(dst = dst(dates)) %>%
+ collect(),
+ test_df
+ )
+})
+
+test_that("dst errors with unsupported input", {
+ expect_error(
+ call_function("is_dst", Scalar$create("this is a string, not a
timestamp")),
+ "NotImplemented: Function 'is_dst' has no kernel matching input types
(scalar[string])",
+ fixed = TRUE
+ )
+ expect_error(
+ call_function("is_dst", Scalar$create(1L)),
+ "NotImplemented: Function 'is_dst' has no kernel matching input types
(scalar[int32])",
+ fixed = TRUE
+ )
+ expect_error(
+ call_function("is_dst", Scalar$create(2.2)),
+ "NotImplemented: Function 'is_dst' has no kernel matching input types
(scalar[double])",
+ fixed = TRUE
+ )
+ expect_error(
+ call_function("is_dst", Scalar$create(TRUE)),
+ "NotImplemented: Function 'is_dst' has no kernel matching input types
(scalar[bool])",
+ fixed = TRUE
+ )
Review comment:
I think you make a great point here @dragosmg about consistent error
messaging. I just wonder if the term "kernel" might be unfamiliar to our R
users who are less familiar with the C++ underpinnings of the package as well.
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
