context("FY")

expect_equal <- function(left, right) {
  testthat::expect_equal(unclass(left),
                         unclass(right), 
                         check.attributes = FALSE)
}

test_that("is.fy() returns TRUE on FYs", {
  expect_true(is.fy("2012-13"))
  expect_true(is.fy("1999-00"))
  expect_true(is.fy("201415"))
})

test_that("is.fy() returns FALSE on non-FYs", {
  expect_false(is.fy("2012-14"))
  expect_false(is.fy("banana"))
  expect_false(is.fy("2012-13 was a long year"))
  expect_false(is.fy("20121313"))
  expect_false(is.fy("12-13"))
})

test_that("Other fy utils", {
  expect_equal(fy.year(2012), "2011-12")
  # Not an FY
  expect_error(fy2yr("2014-16"))
  expect_error(fy2date("2014-16"))
  
  expect_equal(fy2date("2012-13"), as.Date("2013-06-30"))
})

test_that("all_fy", {
  expect_true(all_fy(c("2000-01", "2010-11", "2013-14", "2020-21")))
  expect_true(all_fy(c("2000-01", "2010-11", "2013-14", "2020-21"),
                     permitted = c("2000-01", "2010-11", "2013-14", "2020-21")))
})

test_that("is_fy2", {
  expect_true(all(is_fy2(c("2000-01", "2010-11", "2013-14", "2020-21"))))
})

test_that("fy.year and yr2fy are identical", {
  x <- 1901:2099
  expect_equal(fy.year(x), yr2fy(x))
})

test_that("grattan.assume1901_2100 options", {
  skip_if_not_installed("rlang")
  skip_on_cran()
  x <- 1900:2099
  rlang::with_options(
    expect_equal(fy.year(x), yr2fy(x)),
    grattan.assume1901_2100 = FALSE
  )
  expect_equal(fy.year(x), yr2fy(x, FALSE))
})

test_that("range_fy", {
  expect_identical(max_fy2yr(c("2015-16", "2000-01", "2001-02")), 2016L)
  expect_identical(min_fy2yr(c("2015-16", "2000-01", "2001-02")), 2001L)
})



test_that("NA handling", {
  expect_equal(qtr2fy(c("2014-Q1", NA, "2014-Q2")), 
               c("2013-14", NA, "2013-14"))
  expect_equal(qtr2fy(c(NA, "2014-Q1", "2014-Q2")),
               c(NA, "2013-14", "2013-14"))
})

test_that("qtr2fy error", {
  expect_error(qtr2fy(raw(1)))
})