-module(gleam@function_test).
-compile(no_auto_import).

-export([compose_test/0, curry2_test/0, curry3_test/0, curry4_test/0, curry5_test/0, curry6_test/0, flip_test/0, identity_test/0]).

-spec compose_test() -> nil.
compose_test() ->
    Add_two = fun(Int) -> Int + 2 end,
    Add_three = fun(Int@1) -> Int@1 + 3 end,
    Add_five = gleam@function:compose(Add_two, Add_three),
    _pipe = 1,
    _pipe@1 = Add_five(_pipe),
    gleam@should:equal(_pipe@1, 6),
    Head_to_string = begin
        _pipe@2 = fun gleam@list:head/1,
        _pipe@3 = gleam@function:compose(
            _pipe@2,
            fun(_capture) -> gleam@result:unwrap(_capture, 0) end
        ),
        gleam@function:compose(_pipe@3, fun gleam@int:to_string/1)
    end,
    _pipe@4 = [1],
    _pipe@5 = Head_to_string(_pipe@4),
    gleam@should:equal(_pipe@5, <<"1"/utf8>>),
    _pipe@6 = [],
    _pipe@7 = Head_to_string(_pipe@6),
    gleam@should:equal(_pipe@7, <<"0"/utf8>>).

-spec curry2_test() -> nil.
curry2_test() ->
    Fun = fun(A, B) -> A + B end,
    Curried = gleam@function:curry2(Fun),
    _pipe = (Curried(1))(2),
    gleam@should:equal(_pipe, 3).

-spec curry3_test() -> nil.
curry3_test() ->
    Fun = fun(A, B, C) -> (A + B) + C end,
    Curried = gleam@function:curry3(Fun),
    _pipe = ((Curried(1))(2))(4),
    gleam@should:equal(_pipe, 7).

-spec curry4_test() -> nil.
curry4_test() ->
    Fun = fun(A, B, C, D) -> ((A + B) + C) + D end,
    Curried = gleam@function:curry4(Fun),
    _pipe = (((Curried(1))(2))(4))(8),
    gleam@should:equal(_pipe, 15).

-spec curry5_test() -> nil.
curry5_test() ->
    Fun = fun(A, B, C, D, E) -> (((A + B) + C) + D) + E end,
    Curried = gleam@function:curry5(Fun),
    _pipe = ((((Curried(1))(2))(4))(8))(16),
    gleam@should:equal(_pipe, 31).

-spec curry6_test() -> nil.
curry6_test() ->
    Fun = fun(A, B, C, D, E, F) -> ((((A + B) + C) + D) + E) + F end,
    Curried = gleam@function:curry6(Fun),
    _pipe = (((((Curried(1))(2))(4))(8))(16))(32),
    gleam@should:equal(_pipe, 63).

-spec flip_test() -> nil.
flip_test() ->
    Fun = fun(S, I) ->
        _pipe = S,
        _pipe@1 = gleam@string:append(<<"String: '"/utf8>>, _pipe),
        _pipe@2 = gleam@string:append(_pipe@1, <<"', Int: '"/utf8>>),
        _pipe@3 = gleam@string:append(_pipe@2, gleam@int:to_string(I)),
        gleam@string:append(_pipe@3, <<"'"/utf8>>)
    end,
    Flipped_fun = gleam@function:flip(Fun),
    _pipe@4 = Fun(<<"Bob"/utf8>>, 1),
    gleam@should:equal(_pipe@4, <<"String: 'Bob', Int: '1'"/utf8>>),
    _pipe@5 = Flipped_fun(2, <<"Alice"/utf8>>),
    gleam@should:equal(_pipe@5, <<"String: 'Alice', Int: '2'"/utf8>>).

-spec identity_test() -> nil.
identity_test() ->
    _pipe = 1,
    _pipe@1 = gleam@function:identity(_pipe),
    gleam@should:equal(_pipe@1, 1),
    _pipe@2 = <<""/utf8>>,
    _pipe@3 = gleam@function:identity(_pipe@2),
    gleam@should:equal(_pipe@3, <<""/utf8>>),
    _pipe@4 = [],
    _pipe@5 = gleam@function:identity(_pipe@4),
    gleam@should:equal(_pipe@5, []),
    _pipe@6 = {1, 2.0},
    _pipe@7 = gleam@function:identity(_pipe@6),
    gleam@should:equal(_pipe@7, {1, 2.0}).