Nothing
test_that("hours_year works", {
expect_error(hours_year(1))
expect_identical(hours_year(ISOdate(2000, 1, 1, 1, tz = "UTC")), 1)
expect_identical(hours_year(ISOdate(2000, 1, 1, c(1, 3, 1), tz = "UTC")), c(1L, 3, 1))
expect_identical(hours_year(ISOdate(2001, 1, 1, c(1, 3, 1), tz = "UTC")), c(1, 3, 1))
expect_identical(hours_year(ISOdate(2001, 1, 2, c(1, 3, 1), tz = "UTC")), c(25, 27, 25))
})
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