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gleam_stdlib

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A standard library for the Gleam programming language

Retired package: Release invalid - Does not compile correctly
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gleam_stdlib gen test list_test.erl
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gen/test/list_test.erl 

-module(list_test).

-compile(no_auto_import).



-export([length_test/0, reverse_test/0, is_empty_test/0, contains_test/0, head_test/0, tail_test/0, filter_test/0, map_test/0, traverse_test/0, drop_test/0, take_test/0, new_test/0, append_test/0, flatten_test/0, fold_test/0, fold_right_test/0, find_test/0, all_test/0, any_test/0, zip_test/0, strict_zip_test/0, intersperse_test/0, at_test/0, unique_test/0, sort_test/0, index_map_test/0, range_test/0, repeat_test/0, split_test/0, split_while_test/0]).



length_test() ->

    expect:equal(list:length([]), 0),

    expect:equal(list:length([1]), 1),

    expect:equal(list:length([1, 1]), 2),

    expect:equal(list:length([1, 1, 1]), 3).



reverse_test() ->

    expect:equal(list:reverse([]), []),

    expect:equal(list:reverse([1, 2, 3, 4, 5]), [5, 4, 3, 2, 1]).



is_empty_test() ->

    expect:true(list:is_empty([])),

    expect:false(list:is_empty([1])).



contains_test() ->

    expect:true(list:contains([0, 4, 5, 1], 1)),

    expect:false(list:contains([0, 4, 5, 7], 1)),

    expect:false(list:contains([], 1)).



head_test() ->

    expect:equal(list:head([0, 4, 5, 7]), {ok, 0}),

    expect:is_error(list:head([])).



tail_test() ->

    expect:equal(list:tail([0, 4, 5, 7]), {ok, [4, 5, 7]}),

    expect:equal(list:tail([0]), {ok, []}),

    expect:is_error(list:tail([])).



filter_test() ->

    expect:equal(list:filter([], fun(_) -> true end), []),

    expect:equal(list:filter([0, 4, 5, 7, 3], fun(_) -> true end),

                 [0, 4, 5, 7, 3]),

    expect:equal(list:filter([0, 4, 5, 7, 3], fun(X) -> X > 4 end), [5, 7]),

    expect:equal(list:filter([0, 4, 5, 7, 3], fun(X) -> X < 4 end), [0, 3]).



map_test() ->

    expect:equal(list:map([], fun(X) -> X * 2 end), []),

    expect:equal(list:map([0, 4, 5, 7, 3], fun(X) -> X * 2 end),

                 [0, 8, 10, 14, 6]).



traverse_test() ->

    Fun = fun(X) -> case X =:= 6 orelse X =:= 5 orelse X =:= 4 of

            true ->

                {ok, X * 2};



            false ->

                {error, X}

        end end,

    expect:equal(list:traverse([5, 6, 5, 6], Fun), {ok, [10, 12, 10, 12]}),

    expect:equal(list:traverse([4, 6, 5, 7, 3], Fun), {error, 7}).



drop_test() ->

    expect:equal(list:drop([], 5), []),

    expect:equal(list:drop([1, 2, 3, 4, 5, 6, 7, 8], 5), [6, 7, 8]).



take_test() ->

    expect:equal(list:take([], 5), []),

    expect:equal(list:take([1, 2, 3, 4, 5, 6, 7, 8], 5), [1, 2, 3, 4, 5]).



new_test() ->

    expect:equal(list:new(), []).



append_test() ->

    expect:equal(list:append([1], [2, 3]), [1, 2, 3]).



flatten_test() ->

    expect:equal(list:flatten([]), []),

    expect:equal(list:flatten([[]]), []),

    expect:equal(list:flatten([[], [], []]), []),

    expect:equal(list:flatten([[1, 2], [], [3, 4]]), [1, 2, 3, 4]).



fold_test() ->

    expect:equal(list:fold([1, 2, 3], [], fun(X, Acc) -> [X | Acc] end),

                 [3, 2, 1]).



fold_right_test() ->

    expect:equal(list:fold_right([1, 2, 3], [], fun(X, Acc) -> [X | Acc] end),

                 [1, 2, 3]).



find_test() ->

    F = fun(X) -> case X of

            2 ->

                {ok, 4};



            _ ->

                {error, 0}

        end end,

    expect:equal(list:find([1, 2, 3], F), {ok, 4}),

    expect:equal(list:find([1, 3, 2], F), {ok, 4}),

    expect:is_error(list:find([1, 3], F)).



all_test() ->

    expect:equal(list:all([1, 2, 3, 4, 5], fun(X) -> X > 0 end), true),

    expect:equal(list:all([1, 2, 3, 4, 5], fun(X) -> X < 0 end), false),

    expect:equal(list:all([], fun(_) -> false end), true).



any_test() ->

    expect:equal(list:any([1, 2, 3, 4, 5], fun(X) -> X =:= 2 end), true),

    expect:equal(list:any([1, 2, 3, 4, 5], fun(X) -> X < 0 end), false),

    expect:equal(list:any([], fun(_) -> false end), false).



zip_test() ->

    expect:equal(list:zip([], [1, 2, 3]), []),

    expect:equal(list:zip([1, 2], []), []),

    expect:equal(list:zip([1, 2, 3], [4, 5, 6]), [{1, 4}, {2, 5}, {3, 6}]),

    expect:equal(list:zip([5, 6], [1, 2, 3]), [{5, 1}, {6, 2}]),

    expect:equal(list:zip([5, 6, 7], [1, 2]), [{5, 1}, {6, 2}]).



strict_zip_test() ->

    expect:is_error(list:strict_zip([], [1, 2, 3])),

    expect:is_error(list:strict_zip([1, 2], [])),

    expect:equal(list:strict_zip([1, 2, 3], [4, 5, 6]),

                 {ok, [{1, 4}, {2, 5}, {3, 6}]}),

    expect:is_error(list:strict_zip([5, 6], [1, 2, 3])),

    expect:is_error(list:strict_zip([5, 6, 7], [1, 2])).



intersperse_test() ->

    expect:equal(list:intersperse([1, 2, 3], 4), [1, 4, 2, 4, 3]),

    expect:equal(list:intersperse([], 2), []).



at_test() ->

    expect:equal(list:at([1, 2, 3], 2), {ok, 3}),

    expect:is_error(list:at([1, 2, 3], 5)),

    expect:is_error(list:at([], 0)),

    expect:is_error(list:at([1, 2, 3, 4, 5, 6], -1)).



unique_test() ->

    expect:equal(list:unique([1, 1, 2, 3, 4, 4, 4, 5, 6]), [1, 2, 3, 4, 5, 6]),

    expect:equal(list:unique([7, 1, 45, 6, 2, 47, 2, 7, 5]),

                 [7, 1, 45, 6, 2, 47, 5]),

    expect:equal(list:unique([3, 4, 5]), [3, 4, 5]),

    expect:equal(list:unique([]), []).



sort_test() ->

    expect:equal(list:sort([4, 3, 6, 5, 4]), [3, 4, 4, 5, 6]),

    expect:equal(list:sort([]), []),

    expect:equal(list:sort([{1, 2}, {4, 5}, {3, 2}]), [{1, 2}, {3, 2}, {4, 5}]).



index_map_test() ->

    expect:equal(list:index_map([3, 4, 5], fun(I, X) -> {I, X} end),

                 [{0, 3}, {1, 4}, {2, 5}]),

    F = fun(I, X) -> str:append(X, int:to_string(I)) end,

    expect:equal(list:index_map([<<"a">>, <<"b">>, <<"c">>], F),

                 [<<"a0">>, <<"b1">>, <<"c2">>]).



range_test() ->

    expect:equal(list:range(0, 0), []),

    expect:equal(list:range(1, 1), []),

    expect:equal(list:range(-1, -1), []),

    expect:equal(list:range(0, 1), [0]),

    expect:equal(list:range(0, 5), [0, 1, 2, 3, 4]),

    expect:equal(list:range(1, -5), [1, 0, -1, -2, -3, -4]).



repeat_test() ->

    expect:equal(list:repeat(1, -10), []),

    expect:equal(list:repeat(1, 0), []),

    expect:equal(list:repeat(2, 3), [2, 2, 2]),

    expect:equal(list:repeat(<<"x">>, 5),

                 [<<"x">>, <<"x">>, <<"x">>, <<"x">>, <<"x">>]).



split_test() ->

    expect:equal(list:split([], 0), {[], []}),

    expect:equal(list:split([0, 1, 2, 3, 4], 0), {[], [0, 1, 2, 3, 4]}),

    expect:equal(list:split([0, 1, 2, 3, 4], -2), {[], [0, 1, 2, 3, 4]}),

    expect:equal(list:split([0, 1, 2, 3, 4], 1), {[0], [1, 2, 3, 4]}),

    expect:equal(list:split([0, 1, 2, 3, 4], 3), {[0, 1, 2], [3, 4]}),

    expect:equal(list:split([0, 1, 2, 3, 4], 9), {[0, 1, 2, 3, 4], []}).



split_while_test() ->

    expect:equal(list:split_while([], fun(X) -> X =< 5 end), {[], []}),

    expect:equal(list:split_while([1, 2, 3, 4, 5], fun(X) -> X =< 5 end),

                 {[1, 2, 3, 4, 5], []}),

    expect:equal(list:split_while([1, 2, 3, 4, 5], fun(X) -> X =:= 2 end),

                 {[], [1, 2, 3, 4, 5]}),

    expect:equal(list:split_while([1, 2, 3, 4, 5], fun(X) -> X =< 3 end),

                 {[1, 2, 3], [4, 5]}),

    expect:equal(list:split_while([1, 2, 3, 4, 5], fun(X) -> X =< -3 end),

                 {[], [1, 2, 3, 4, 5]}).