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ARROW-14816: [R] Implement bindings for lubridate::mday #12218

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ARROW-14816: [R] Implement bindings for lubridate::mday #12218

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1 change: 1 addition & 0 deletions r/R/expression.R
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Original file line number Diff line number Diff line change
Expand Up @@ -70,6 +70,7 @@
"quarter" = "quarter",
# second is defined in dplyr-functions.R
# wday is defined in dplyr-functions.R
"mday" = "day",
"yday" = "day_of_year",
"year" = "year",

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18 changes: 18 additions & 0 deletions r/tests/testthat/test-dplyr-funcs-datetime.R
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Expand Up @@ -444,6 +444,15 @@ test_that("extract wday from timestamp", {
)
})

test_that("extract mday from timestamp", {
compare_dplyr_binding(
.input %>%
mutate(x = mday(datetime)) %>%
collect(),
test_df
)
})

test_that("extract yday from timestamp", {
compare_dplyr_binding(
.input %>%
Expand Down Expand Up @@ -626,6 +635,15 @@ test_that("extract wday from date", {
)
})

test_that("extract mday from date", {
compare_dplyr_binding(
.input %>%
mutate(x = mday(date)) %>%
collect(),
test_df
)
})

test_that("extract yday from date", {
compare_dplyr_binding(
.input %>%
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