module Main (main) where
import Data.Time.Calendar.BankHoliday.Germany
import Data.Time.Calendar.BankHoliday.Germany.ExtraHolidays qualified as EH
import Data.Time.Calendar.WeekDate
import Data.Time
import qualified Hedgehog.Gen as Gen
import qualified Hedgehog.Range as Range
import Test.Hspec (describe, hspec, it, shouldBe)
import Test.Hspec.Hedgehog (forAll, hedgehog, (===))
import Test.DocTest
day :: Year -> Int -> Int -> Day
day = fromGregorian
year :: Day -> Year
year = (\(y, _, _) -> y) . toGregorian
main :: IO ()
main = do
doctest ["src/"]
hspec $ do
describe "Data.Time.Calendar.BankHoliday.Germany" $ do
describe "holidaysBetween" $ do
it "works for Christmas" $
holidaysBetween (day 2024 12 1) (day 2024 12 30)
`shouldBe` [(day 2024 12 24, ChristmasEve), (day 2024 12 25, ChristmasDay), (day 2024 12 26, SecondChristmasDay)]
it "is empty list when there are no holidays" $
holidaysBetween (day 2024 12 1) (day 2024 12 3)
`shouldBe` []
it "counts 11 bank holidays and 9 public holidays per year (2010 to 2020)" $ hedgehog $ do
y <- forAll $ Gen.integral (Range.linear 2010 2020)
let bankHolidays = holidaysBetween (day y 1 1) (day y 12 31)
length bankHolidays === 11
length (filter (isPublicHoliday . snd) bankHolidays) === 9
describe "toDay" $ do
it "always returns a day in the given year" $ hedgehog $ do
y <- forAll $ Gen.integral (Range.linear 0 5000)
d <- forAll Gen.enumBounded
year (toDay y d) === y
it "Easter Monday is always a Monday" $ hedgehog $ do
y <- forAll $ Gen.integral (Range.linear 0 5000)
let (_, _, d) = toWeekDate $ toDay y EasterMonday
d === 1 -- 1 = Monday
describe "calculateEasterSunday" $ do
it "is always between Mar 22 and Apr 25" $ hedgehog $ do
y <- forAll $ Gen.integral (Range.linear 0 10000)
(calculateEasterSunday y >= day y 3 22) === True
(calculateEasterSunday y <= day y 4 25) === True
it "is correct for some years" $ do
calculateEasterSunday 2024 `shouldBe` day 2024 3 31
calculateEasterSunday 2025 `shouldBe` day 2025 4 20
calculateEasterSunday 2026 `shouldBe` day 2026 4 5
it "is always a Sunday" $ hedgehog $ do
y <- forAll $ Gen.integral (Range.linear 0 5000)
let (_, _, d) = toWeekDate $ calculateEasterSunday y
d === 7 -- 7 = Sunday
describe "isPublicHoliday" $ do
it "is False only for Chrismas Eve and New Year's Eve" $
length (filter (not . isPublicHoliday) [minBound..maxBound])
`shouldBe` 2
describe "yearFromDay" $ do
it "works for any year" $ hedgehog $ do
y <- forAll $ Gen.integral (Range.linear 0 5000)
m <- forAll $ Gen.integral (Range.linear 1 12)
d <- forAll $ Gen.integral (Range.linear 1 28)
yearFromDay (day y m d) === y
describe "Data.Time.Calendar.BankHoliday.Germany.ExtraHolidays" $ do
describe "FederalState" $
it "has right number of states" $
length [minBound .. maxBound :: EH.FederalState] `shouldBe` 16
describe "toDay" $
it "works for Fronleichnam (depending on Easter Sunday)" $ do
-- https://www.arbeitstage.org/feiertage/fronleichnam/
map (\y -> show $ EH.toDay y EH.Fronleichnam) [2024..2027]
`shouldBe` ["2024-05-30", "2025-06-19", "2026-06-04", "2027-05-27"]
describe "holidaysBetween" $ do
it "only has Bavaria's extra holidays" $
map snd (EH.holidaysBetween EH.Bayern (day 2024 11 1) (day 2024 12 31))
`shouldBe` [EH.Allerheiligen]
it "has no holidays for other states yet => otherwise, please add tests" $ do
let statesExceptBavaria = filter (/=EH.Bayern) [minBound..maxBound]
let holidays = concatMap (\x -> EH.holidaysBetween x (day 2024 1 1) (day 2024 12 31)) statesExceptBavaria
holidays `shouldBe` []