module DateTests exposing (..)

import Expect exposing (Expectation)
import Fuzz exposing (Fuzzer, int, list, string)
import Test exposing (..)

import Date exposing (..)


testYear : Test
testYear =
    describe "year method test"
        [ test "year of 1.1.2018" <|
            \() ->
                Expect.equal 2018 (year (1, 1, 2018))
        , test "year of 1.1.2019" <|
            \() ->
                Expect.equal 2019 (year (7, 4, 2019))
        , test "year of 1.1.2020" <|
            \() ->
                Expect.equal 2020 (year (1, 1, 2020))
        , test "year of 01.01.1970" <|
            \() ->
                Expect.equal 1970 (year (1, 1, 1970))
        , test "year of 02.06.2024 " <|
            \() ->
                Expect.equal 2024 (year (2, 6, 2024))
        ]

testMonth : Test
testMonth =
    describe "month method test"
        [ test "month of 1.8.2018" <|
            \() ->
                Expect.equal 8 (month (1, 8, 2018))
        , test "month of 1.1.2019" <|
            \() ->
                Expect.equal 4 (month (7, 4, 2019))
        , test "month of 1.12.2020" <|
            \() ->
                Expect.equal 12 (month (1, 12, 2020))
        , test "month of 01.01.1970" <|
            \() ->
                Expect.equal 1 (month (1, 1, 1970))
        , test "month of 02.06.2024 " <|
            \() ->
                Expect.equal 6 (month (2, 6, 2024))
        ]

testDay : Test
testDay =
    describe "day method test"
        [ test "day of 5.8.2018" <|
            \() ->
                Expect.equal 5 (day (5, 8, 2018))
        , test "day of 8.1.2019" <|
            \() ->
                Expect.equal 8 (day (8, 4, 2019))
        , test "day of 1.12.2020" <|
            \() ->
                Expect.equal 20 (day (20, 12, 2020))
        , test "day of 01.01.1970" <|
            \() ->
                Expect.equal 1 (day (1, 1, 1970))
        , test "day of 02.06.2024 " <|
            \() ->
                Expect.equal 2 (day (2, 6, 2024))
        ]

-- DD.MM.YYYY, months/days < 10 have a leading 0
testToString : Test
testToString =
    describe "toString method test"
        [ test "toString of 05.8.2018" <|
            \() ->
                Expect.equal "05.08.2018" (toString (5, 8, 2018))
        , test "toString of 08.1.2019" <|
            \() ->
                Expect.equal "08.04.2019" (toString (8, 4, 2019))
        , test "toString of 20.12.2020" <|
            \() ->
                Expect.equal "20.12.2020" (toString (20, 12, 2020))
        , test "toString of 01.01.1970" <|
            \() ->
                Expect.equal "01.01.1970" (toString (1, 1, 1970))
        , test "toString of 02.06.2024 " <|
            \() ->
                Expect.equal "02.06.2024" (toString (2, 6, 2024))
        ]


leapYearTest : Test
leapYearTest =
    describe "leap year test"
        [test "leap year 2020" <|
            \() ->
                Expect.equal True (leapyear 2020)
        , test "leap year 2024" <|
            \() ->
                Expect.equal True (leapyear 2024)
        , test "leap year 2021" <|
            \() ->
                Expect.equal False (leapyear 2021)
        , test "leap year 2022" <|
            \() ->
                Expect.equal False (leapyear 2022)
        ]



ltTest : Test
ltTest =
    describe "less than test"
        [test "lt 01.01.1970 01.01.1970" <|
            \() ->
                Expect.equal False (lt (1, 1, 1970) (1, 1, 1970))
        , test "lt 01.01.1970 02.01.1970" <|
            \() ->
                Expect.equal True (lt (1, 1, 1970) (2, 1, 1970))
        , test "lt 01.01.1970 01.02.2000" <|
            \() ->
                Expect.equal True (lt (1, 1, 1970) (1, 2, 2000))
        , test "lt 01.01.2000 01.01.1999" <|
            \() ->
                Expect.equal False (lt (1, 1, 2000) (1, 1, 1999))
        ]

eqTest : Test
eqTest =
    describe "eq test"
        [test "eq 01.01.1970 01.01.1970" <|
            \() ->
                Expect.equal True (eq (1, 1, 1970) (1, 1, 1970))
        , test "eq 01.01.1970 02.01.1970" <|
            \() ->
                Expect.equal False (eq (1, 1, 1970) (2, 1, 1970))
        , test "eq 01.01.1970 01.02.2000" <|
            \() ->
                Expect.equal False (eq (1, 1, 1970) (1, 2, 2000))
        , test "eq 01.01.2000 01.01.1999" <|
            \() ->
                Expect.equal False (eq (1, 1, 1970) (1, 1, 1999))
        ]

gtTest : Test
gtTest =
    describe "gt test"
        [test "gt 01.01.1970 01.01.1970" <|
            \() ->
                Expect.equal False (gt (1, 1, 1970) (1, 1, 1970))
        , test "gt 01.01.1970 02.01.1970" <|
            \() ->
                Expect.equal False (gt (1, 1, 1970) (2, 1, 1970))
        , test "gt 01.01.1970 01.02.2000" <|
            \() ->
                Expect.equal False (gt (1, 1, 1970) (1, 2, 2000))
        , test "gt 01.01.2000 01.01.1999" <|
            \() ->
                Expect.equal True (gt (1, 1, 2000) (1, 1, 1999))
        , test "gt 05.01.2000 01.01.2000" <|
            \() ->
                Expect.equal True (gt (5, 1, 2000) (1, 1, 2000))
        ]