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retired
A standard library for the Gleam programming language
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gen/test/gleam@list_test.erl
-module(gleam@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, filter_map_test/0, map_test/0, try_map_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_map_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, key_find_test/0, pop_test/0, pop_map_test/0, key_pop_test/0]).
length_test() ->
gleam@should:equal(gleam@list:length([]), 0),
gleam@should:equal(gleam@list:length([1]), 1),
gleam@should:equal(gleam@list:length([1, 1]), 2),
gleam@should:equal(gleam@list:length([1, 1, 1]), 3).
reverse_test() ->
gleam@should:equal(gleam@list:reverse([]), []),
gleam@should:equal(gleam@list:reverse([1, 2, 3, 4, 5]), [5, 4, 3, 2, 1]).
is_empty_test() ->
gleam@should:be_true(gleam@list:is_empty([])),
gleam@should:be_false(gleam@list:is_empty([1])).
contains_test() ->
gleam@should:be_true(gleam@list:contains([0, 4, 5, 1], 1)),
gleam@should:be_false(gleam@list:contains([0, 4, 5, 7], 1)),
gleam@should:be_false(gleam@list:contains([], 1)).
head_test() ->
gleam@should:equal(gleam@list:head([0, 4, 5, 7]), {ok, 0}),
gleam@should:equal(gleam@list:head([]), {error, nil}).
tail_test() ->
gleam@should:equal(gleam@list:tail([0, 4, 5, 7]), {ok, [4, 5, 7]}),
gleam@should:equal(gleam@list:tail([0]), {ok, []}),
gleam@should:equal(gleam@list:tail([]), {error, nil}).
filter_test() ->
gleam@should:equal(gleam@list:filter([], fun(_) -> true end), []),
gleam@should:equal(
gleam@list:filter([0, 4, 5, 7, 3], fun(_) -> true end),
[0, 4, 5, 7, 3]
),
gleam@should:equal(
gleam@list:filter([0, 4, 5, 7, 3], fun(X) -> X > 4 end),
[5, 7]
),
gleam@should:equal(
gleam@list:filter([0, 4, 5, 7, 3], fun(X1) -> X1 < 4 end),
[0, 3]
).
filter_map_test() ->
gleam@should:equal(
gleam@list:filter_map([2, 4, 6, 1], fun(X) -> {ok, X + 1} end),
[3, 5, 7, 2]
),
gleam@should:equal(
gleam@list:filter_map([2, 4, 6, 1], fun(A) -> {error, A} end),
[]
).
map_test() ->
gleam@should:equal(gleam@list:map([], fun(X) -> X * 2 end), []),
gleam@should:equal(
gleam@list:map([0, 4, 5, 7, 3], fun(X1) -> X1 * 2 end),
[0, 8, 10, 14, 6]
).
try_map_test() ->
Fun = fun(X) -> case ((X =:= 6) orelse (X =:= 5)) orelse (X =:= 4) of
true ->
{ok, X * 2};
false ->
{error, X}
end end,
gleam@should:equal(
gleam@list:try_map([5, 6, 5, 6], Fun),
{ok, [10, 12, 10, 12]}
),
gleam@should:equal(gleam@list:try_map([4, 6, 5, 7, 3], Fun), {error, 7}).
drop_test() ->
gleam@should:equal(gleam@list:drop([], 5), []),
gleam@should:equal(gleam@list:drop([1, 2, 3, 4, 5, 6, 7, 8], 5), [6, 7, 8]).
take_test() ->
gleam@should:equal(gleam@list:take([], 5), []),
gleam@should:equal(
gleam@list:take([1, 2, 3, 4, 5, 6, 7, 8], 5),
[1, 2, 3, 4, 5]
).
new_test() ->
gleam@should:equal(gleam@list:new(), []).
append_test() ->
gleam@should:equal(gleam@list:append([1], [2, 3]), [1, 2, 3]).
flatten_test() ->
gleam@should:equal(gleam@list:flatten([]), []),
gleam@should:equal(gleam@list:flatten([[]]), []),
gleam@should:equal(gleam@list:flatten([[], [], []]), []),
gleam@should:equal(gleam@list:flatten([[1, 2], [], [3, 4]]), [1, 2, 3, 4]).
fold_test() ->
gleam@should:equal(
gleam@list:fold([1, 2, 3], [], fun(X, Acc) -> [X | Acc] end),
[3, 2, 1]
).
fold_right_test() ->
gleam@should:equal(
gleam@list:fold_right([1, 2, 3], [], fun(X, Acc) -> [X | Acc] end),
[1, 2, 3]
).
find_map_test() ->
F = fun(X) -> case X of
2 ->
{ok, 4};
_ ->
{error, nil}
end end,
gleam@should:equal(gleam@list:find_map([1, 2, 3], F), {ok, 4}),
gleam@should:equal(gleam@list:find_map([1, 3, 2], F), {ok, 4}),
gleam@should:equal(gleam@list:find_map([1, 3], F), {error, nil}).
find_test() ->
IsTwo = fun(X) -> X =:= 2 end,
gleam@should:equal(gleam@list:find([1, 2, 3], IsTwo), {ok, 2}),
gleam@should:equal(gleam@list:find([1, 3, 2], IsTwo), {ok, 2}),
gleam@should:equal(gleam@list:find([1, 3], IsTwo), {error, nil}).
all_test() ->
gleam@should:equal(
gleam@list:all([1, 2, 3, 4, 5], fun(X) -> X > 0 end),
true
),
gleam@should:equal(
gleam@list:all([1, 2, 3, 4, 5], fun(X1) -> X1 < 0 end),
false
),
gleam@should:equal(gleam@list:all([], fun(_) -> false end), true).
any_test() ->
gleam@should:equal(
gleam@list:any([1, 2, 3, 4, 5], fun(X) -> X =:= 2 end),
true
),
gleam@should:equal(
gleam@list:any([1, 2, 3, 4, 5], fun(X1) -> X1 < 0 end),
false
),
gleam@should:equal(gleam@list:any([], fun(_) -> false end), false).
zip_test() ->
gleam@should:equal(gleam@list:zip([], [1, 2, 3]), []),
gleam@should:equal(gleam@list:zip([1, 2], []), []),
gleam@should:equal(
gleam@list:zip([1, 2, 3], [4, 5, 6]),
[{1, 4}, {2, 5}, {3, 6}]
),
gleam@should:equal(gleam@list:zip([5, 6], [1, 2, 3]), [{5, 1}, {6, 2}]),
gleam@should:equal(gleam@list:zip([5, 6, 7], [1, 2]), [{5, 1}, {6, 2}]).
strict_zip_test() ->
gleam@should:equal(
gleam@list:strict_zip([], [1, 2, 3]),
{error, length_mismatch}
),
gleam@should:equal(
gleam@list:strict_zip([1, 2], []),
{error, length_mismatch}
),
gleam@should:equal(
gleam@list:strict_zip([1, 2, 3], [4, 5, 6]),
{ok, [{1, 4}, {2, 5}, {3, 6}]}
),
gleam@should:equal(
gleam@list:strict_zip([5, 6], [1, 2, 3]),
{error, length_mismatch}
),
gleam@should:equal(
gleam@list:strict_zip([5, 6, 7], [1, 2]),
{error, length_mismatch}
).
intersperse_test() ->
gleam@should:equal(gleam@list:intersperse([1, 2, 3], 4), [1, 4, 2, 4, 3]),
gleam@should:equal(gleam@list:intersperse([], 2), []).
at_test() ->
gleam@should:equal(gleam@list:at([1, 2, 3], 2), {ok, 3}),
gleam@should:equal(gleam@list:at([1, 2, 3], 5), {error, nil}),
gleam@should:equal(gleam@list:at([], 0), {error, nil}),
gleam@should:equal(gleam@list:at([1, 2, 3, 4, 5, 6], -1), {error, nil}).
unique_test() ->
gleam@should:equal(
gleam@list:unique([1, 1, 2, 3, 4, 4, 4, 5, 6]),
[1, 2, 3, 4, 5, 6]
),
gleam@should:equal(
gleam@list:unique([7, 1, 45, 6, 2, 47, 2, 7, 5]),
[7, 1, 45, 6, 2, 47, 5]
),
gleam@should:equal(gleam@list:unique([3, 4, 5]), [3, 4, 5]),
gleam@should:equal(gleam@list:unique([]), []).
sort_test() ->
gleam@should:equal(
gleam@list:sort([4, 3, 6, 5, 4], fun gleam@int:compare/2),
[3, 4, 4, 5, 6]
),
gleam@should:equal(
gleam@list:sort([4, 3, 6, 5, 4, 1], fun gleam@int:compare/2),
[1, 3, 4, 4, 5, 6]
),
gleam@should:equal(
gleam@list:sort([4.1, 3.1, 6.1, 5.1, 4.1], fun gleam@float:compare/2),
[3.1, 4.1, 4.1, 5.1, 6.1]
),
gleam@should:equal(gleam@list:sort([], fun gleam@int:compare/2), []).
index_map_test() ->
gleam@should:equal(
gleam@list:index_map([3, 4, 5], fun(I, X) -> {I, X} end),
[{0, 3}, {1, 4}, {2, 5}]
),
F = fun(I1, X1) -> gleam@string:append(X1, gleam@int:to_string(I1)) end,
gleam@should:equal(
gleam@list:index_map([<<"a"/utf8>>, <<"b"/utf8>>, <<"c"/utf8>>], F),
[<<"a0"/utf8>>, <<"b1"/utf8>>, <<"c2"/utf8>>]
).
range_test() ->
gleam@should:equal(gleam@list:range(0, 0), []),
gleam@should:equal(gleam@list:range(1, 1), []),
gleam@should:equal(gleam@list:range(-1, -1), []),
gleam@should:equal(gleam@list:range(0, 1), [0]),
gleam@should:equal(gleam@list:range(0, 5), [0, 1, 2, 3, 4]),
gleam@should:equal(gleam@list:range(1, -5), [1, 0, -1, -2, -3, -4]).
repeat_test() ->
gleam@should:equal(gleam@list:repeat(1, -10), []),
gleam@should:equal(gleam@list:repeat(1, 0), []),
gleam@should:equal(gleam@list:repeat(2, 3), [2, 2, 2]),
gleam@should:equal(
gleam@list:repeat(<<"x"/utf8>>, 5),
[<<"x"/utf8>>, <<"x"/utf8>>, <<"x"/utf8>>, <<"x"/utf8>>, <<"x"/utf8>>]
).
split_test() ->
gleam@should:equal(gleam@list:split([], 0), {[], []}),
gleam@should:equal(
gleam@list:split([0, 1, 2, 3, 4], 0),
{[], [0, 1, 2, 3, 4]}
),
gleam@should:equal(
gleam@list:split([0, 1, 2, 3, 4], -2),
{[], [0, 1, 2, 3, 4]}
),
gleam@should:equal(
gleam@list:split([0, 1, 2, 3, 4], 1),
{[0], [1, 2, 3, 4]}
),
gleam@should:equal(
gleam@list:split([0, 1, 2, 3, 4], 3),
{[0, 1, 2], [3, 4]}
),
gleam@should:equal(
gleam@list:split([0, 1, 2, 3, 4], 9),
{[0, 1, 2, 3, 4], []}
).
split_while_test() ->
gleam@should:equal(
gleam@list:split_while([], fun(X) -> X =< 5 end),
{[], []}
),
gleam@should:equal(
gleam@list:split_while([1, 2, 3, 4, 5], fun(X1) -> X1 =< 5 end),
{[1, 2, 3, 4, 5], []}
),
gleam@should:equal(
gleam@list:split_while([1, 2, 3, 4, 5], fun(X2) -> X2 =:= 2 end),
{[], [1, 2, 3, 4, 5]}
),
gleam@should:equal(
gleam@list:split_while([1, 2, 3, 4, 5], fun(X3) -> X3 =< 3 end),
{[1, 2, 3], [4, 5]}
),
gleam@should:equal(
gleam@list:split_while([1, 2, 3, 4, 5], fun(X4) -> X4 =< -3 end),
{[], [1, 2, 3, 4, 5]}
).
key_find_test() ->
Proplist = [{0, <<"1"/utf8>>}, {1, <<"2"/utf8>>}],
gleam@should:equal(gleam@list:key_find(Proplist, 0), {ok, <<"1"/utf8>>}),
gleam@should:equal(gleam@list:key_find(Proplist, 1), {ok, <<"2"/utf8>>}),
gleam@should:equal(gleam@list:key_find(Proplist, 2), {error, nil}).
pop_test() ->
gleam@should:equal(
gleam@list:pop([1, 2, 3], fun(X) -> X > 2 end),
{ok, {3, [1, 2]}}
),
gleam@should:equal(
gleam@list:pop([1, 2, 3], fun(X1) -> X1 > 4 end),
{error, nil}
),
gleam@should:equal(gleam@list:pop([], fun(_) -> true end), {error, nil}).
pop_map_test() ->
gleam@should:equal(
gleam@list:pop_map(
[<<"foo"/utf8>>, <<"2"/utf8>>, <<"3"/utf8>>],
fun gleam@int:parse/1
),
{ok, {2, [<<"foo"/utf8>>, <<"3"/utf8>>]}}
),
gleam@should:equal(
gleam@list:pop_map(
[<<"foo"/utf8>>, <<"bar"/utf8>>],
fun gleam@int:parse/1
),
{error, nil}
),
gleam@should:equal(
gleam@list:pop_map([], fun gleam@int:parse/1),
{error, nil}
).
key_pop_test() ->
gleam@should:equal(
gleam@list:key_pop([{<<"a"/utf8>>, 0}, {<<"b"/utf8>>, 1}], <<"a"/utf8>>),
{ok, {0, [{<<"b"/utf8>>, 1}]}}
),
gleam@should:equal(
gleam@list:key_pop([{<<"a"/utf8>>, 0}, {<<"b"/utf8>>, 1}], <<"b"/utf8>>),
{ok, {1, [{<<"a"/utf8>>, 0}]}}
),
gleam@should:equal(
gleam@list:key_pop([{<<"a"/utf8>>, 0}, {<<"b"/utf8>>, 1}], <<"c"/utf8>>),
{error, nil}
).