dragosmg commented on a change in pull request #12357:
URL: https://github.com/apache/arrow/pull/12357#discussion_r807865735
##########
File path: r/tests/testthat/test-dplyr-funcs-datetime.R
##########
@@ -711,3 +711,71 @@ test_that("am/pm mirror lubridate", {
)
})
+
+test_that("extract tz", {
+ df <- tibble(
+ x = as.POSIXct(c("2022-02-07", "2022-02-10"), tz = "Pacific/Marquesas"),
+ #lubridate::tz() returns -for the time being - "UTC" for NAs, strings,
+ #dates and numerics
+ y = c("2022-02-07", NA),
+ z = as.Date(c("2022-02-07", NA)),
+ w = c(1L, 5L),
+ v = c(1.1, 2.47)
+ )
+
+ compare_dplyr_binding(
+ .input %>%
+ mutate(timezone_x = tz(x)) %>%
+ collect(),
+ df
+ )
+
+ expect_snapshot(
+ compare_dplyr_binding(
+ .input %>%
+ mutate(
+ timezone_y = tz(x),
+ timezone_z = tz(y)
+ ) %>%
+ collect(),
+ df
+ ),
+ error = TRUE
Review comment:
I don't think something like `call_binding("tz", ...)` works because
whatever we pass via the `...` needs to be an `Expression`. Which I think is
the reason why `arrow::tz()` only works in a dplyr context, i.e. it doesn't
work on standalone `Arrays`. That was why I was testing errors with dplyr
pipelines.
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