recur-on-month-of-year.md
In almanac: Tools for Working with Recurrence Rules

can normalize various month character strings

Code
  yearly() %>% recur_on_month_of_year("Janu")
Condition
  Error in `recur_on_month_of_year()`:
  ! `"janu"` must be a month name or abbreviation.

cannot use `month > 12` or `month < 1`

Code
  (expect_error(yearly() %>% recur_on_month_of_year(13)))
Output
  <error/rlang_error>
  Error in `recur_on_month_of_year()`:
  ! `month` can only take values in [1, 12].
Code
  (expect_error(yearly() %>% recur_on_month_of_year(0)))
Output
  <error/rlang_error>
  Error in `recur_on_month_of_year()`:
  ! `month` can only take values in [1, 12].
Code
  (expect_error(yearly() %>% recur_on_month_of_year(-1)))
Output
  <error/rlang_error>
  Error in `recur_on_month_of_year()`:
  ! `month` can only take values in [1, 12].

`month` must be a character / integer

Code
  yearly() %>% recur_on_month_of_year(30.5)
Condition
  Error in `recur_on_month_of_year()`:
  ! Can't convert from `month` <double> to <integer> due to loss of precision.
  * Locations: 1

`month` can't be missing

Code
  yearly() %>% recur_on_month_of_year(NA_integer_)
Condition
  Error in `recur_on_month_of_year()`:
  ! `month` can't contain missing values.
  i Missing values were detected at locations: 1.