context("utils")


test_that("utils works as expected", {
  q <- date_yq(2018, 1)
  m <- date_ym(2018, 1)
  w <- date_yw(2018, 1)
  y <- date_y(2018)
  a <- structure("test", class = c("date_yq", "blahblah", "date_xx"))
  b <- structure("test", class = c("date_yq", "date_ym", "date_xx"))

  expect_identical(which_date_xx(q), "date_yq")
  expect_identical(which_date_xx(m), "date_ym")
  expect_identical(which_date_xx(w), "date_yw")
  expect_identical(which_date_xx(y), "date_y")

  expect_identical(which_date_xx(a), "date_yq")
  expect_error(which_date_xx(b))

  # substr_right
  expect_identical(substr_right("blubb", 3), "ubb")
})




test_that("tz works", {
  if (!requireNamespace("lubridate", quietly = TRUE)){
    skip("test requires lubridate")
  }

  expect_identical(tz(Sys.Date()), lubridate::tz(Sys.Date()))
  t <- as.Date(Sys.Date(), tz = "CET")
  expect_identical(tz(t), lubridate::tz(t))
})