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lists_SUITE.erl
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%%
%% %CopyrightBegin%
%%
%% SPDX-License-Identifier: Apache-2.0
%%
%% Copyright Ericsson AB 1997-2025. All Rights Reserved.
%%
%% Licensed under the Apache License, Version 2.0 (the "License");
%% you may not use this file except in compliance with the License.
%% You may obtain a copy of the License at
%%
%% http://www.apache.org/licenses/LICENSE-2.0
%%
%% Unless required by applicable law or agreed to in writing, software
%% distributed under the License is distributed on an "AS IS" BASIS,
%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%% See the License for the specific language governing permissions and
%% limitations under the License.
%%
%% %CopyrightEnd%
%%
%%%----------------------------------------------------------------
%%% Purpose: Test suite for the 'lists' module.
%%%-----------------------------------------------------------------
-module(lists_SUITE).
-include_lib("common_test/include/ct.hrl").
%% Test server specific exports
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2]).
-export([init_per_testcase/2, end_per_testcase/2]).
%% Test cases must be exported.
-export([member/1, reverse/1,
keymember/1, keysearch_keyfind/1,
keystore/1, keytake/1, keyreplace/1,
append_1/1, append_2/1,
seq_loop/1, seq_2/1, seq_3/1, seq_2_e/1, seq_3_e/1,
sublist_2/1, sublist_3/1, sublist_2_e/1, sublist_3_e/1,
flatten_1/1, flatten_2/1, flatten_1_e/1, flatten_2_e/1,
dropwhile/1, takewhile/1,
sort_1/1, merge/1, rmerge/1, sort_rand/1,
usort_1/1, umerge/1, rumerge/1,usort_rand/1,
keymerge/1, rkeymerge/1,
keysort_1/1, keysort_i/1,
keysort_rand/1, keysort_error/1,
ukeymerge/1, rukeymerge/1,
ukeysort_1/1, ukeysort_i/1,
ukeysort_rand/1, ukeysort_error/1,
uniq_1/1, uniq_2/1,
zip_unzip/1, zip_unzip3/1, zipwith/1, zipwith3/1,
zip_fail/1, zip_trim/1, zip_pad/1,
zip3_fail/1, zip3_trim/1, zip3_pad/1,
zipwith_fail/1, zipwith_trim/1, zipwith_pad/1,
zipwith3_fail/1, zipwith3_trim/1, zipwith3_pad/1,
filter_partition/1,
join/1,
otp_5939/1, otp_6023/1, otp_6606/1, otp_7230/1,
suffix/1, subtract/1, droplast/1, search/1, hof/1,
enumerate/1, error_info/1,
doctests/1]).
%% Sort randomized lists until stopped.
%%
%% If you update some of the sort or merge functions, you should
%% definitely let sort_loop work for a couple of hours or days. Try
%% both sort_loop/0 and sort_loop/1 with a small argument (30-50 say).
-export([sort_loop/0, sort_loop/1, sloop/1]).
%%
%% all/1
%%
suite() ->
[{ct_hooks,[ts_install_cth]},
{timetrap,{minutes,4}}].
all() ->
[{group, append},
{group, key},
{group, sort},
{group, usort},
{group, keysort},
{group, ukeysort},
{group, uniq},
{group, sublist},
{group, flatten},
{group, seq},
{group, tickets},
{group, zip},
{group, misc}].
groups() ->
[{append, [parallel], [append_1, append_2]},
{usort, [parallel],
[umerge, rumerge, usort_1, usort_rand]},
{keysort, [parallel],
[keymerge, rkeymerge, keysort_1, keysort_rand,
keysort_i, keysort_error]},
{key, [parallel], [keymember, keysearch_keyfind, keystore,
keytake, keyreplace]},
{sort,[parallel],[merge, rmerge, sort_1, sort_rand]},
{ukeysort, [parallel],
[ukeymerge, rukeymerge, ukeysort_1, ukeysort_rand,
ukeysort_i, ukeysort_error]},
{seq, [parallel], [seq_loop, seq_2, seq_3, seq_2_e, seq_3_e]},
{sublist, [parallel],
[sublist_2, sublist_3, sublist_2_e, sublist_3_e]},
{flatten, [parallel],
[flatten_1, flatten_2, flatten_1_e, flatten_2_e]},
{tickets, [parallel], [otp_5939, otp_6023, otp_6606, otp_7230]},
{zip, [parallel], [zip_unzip, zip_unzip3, zipwith, zipwith3,
zip_fail, zip_trim, zip_pad,
zip3_fail, zip3_trim, zip3_pad,
zipwith_fail, zipwith_trim, zipwith_pad,
zipwith3_fail, zipwith3_trim, zipwith3_pad]},
{uniq, [parallel], [uniq_1, uniq_2]},
{misc, [parallel], [reverse, member, dropwhile, takewhile,
filter_partition, suffix, subtract, join,
hof, droplast, search, enumerate, error_info,
doctests]}
].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
init_per_testcase(_Case, Config) ->
Config.
end_per_testcase(_Case, _Config) ->
ok.
%%
%% Test cases starts here.
%%
append_1(Config) when is_list(Config) ->
"abcdef"=lists:append(["abc","def"]),
[hej, du,[glade, [bagare]]]=
lists:append([[hej], [du], [[glade, [bagare]]]]),
[10, [elem]]=lists:append([[10], [[elem]]]),
ok.
append_2(Config) when is_list(Config) ->
"abcdef"=lists:append("abc", "def"),
[hej, du]=lists:append([hej], [du]),
[10, [elem]]=lists:append([10], [[elem]]),
%% Trapping, both crashing and otherwise.
[append_trapping_1(N) || N <- lists:seq(0, 20)],
ok.
append_trapping_1(N) ->
List = lists:duplicate(N + (1 bsl N), gurka),
ImproperList = List ++ crash,
{'EXIT',_} = (catch (ImproperList ++ [])),
[3, 2, 1 | List] = lists:reverse(List ++ [1, 2, 3]),
ok.
%% Tests the lists:reverse() implementation. The function is
%% `non-blocking', and only processes a fixed number of elements at a
%% time.
reverse(Config) when is_list(Config) ->
reverse_test(0),
reverse_test(1),
reverse_test(2),
reverse_test(128),
reverse_test(256),
reverse_test(1000),
reverse_test(1998),
reverse_test(1999),
reverse_test(2000),
reverse_test(2001),
reverse_test(3998),
reverse_test(3999),
reverse_test(4000),
reverse_test(4001),
reverse_test(60001),
reverse_test(100007),
ok.
reverse_test(0) ->
case lists:reverse([]) of
[] ->
ok;
_Other ->
error
end;
reverse_test(Num) ->
List0 = ['The Element'|lists:duplicate(Num, 'Ele')],
List = lists:reverse(List0),
['Ele'|_] = List,
'The Element' = lists:last(List),
List0 = lists:reverse(List),
ok.
%% Test the lists:member() implementation. This test case depends on
%% lists:reverse() to work, wich is tested in a separate test case.
member(Config) when is_list(Config) ->
{'EXIT',{badarg,_}} = (catch lists:member(45, {a,b,c})),
{'EXIT',{badarg,_}} = (catch lists:member(45, [0|non_list_tail])),
false = lists:member(4233, []),
member_test(1),
member_test(100),
member_test(256),
member_test(1000),
member_test(1998),
member_test(1999),
member_test(2000),
member_test(2001),
member_test(3998),
member_test(3999),
member_test(4000),
member_test(4001),
member_test(100008),
ok.
member_test(Num) ->
List0 = ['The Element'|lists:duplicate(Num, 'Elem')],
true = lists:member('The Element', List0),
true = lists:member('Elem', List0),
false = lists:member(arne_anka, List0),
false = lists:member({a,b,c}, List0),
List = lists:reverse(List0),
true = lists:member('The Element', List),
true = lists:member('Elem', List),
false = lists:member(arne_anka, List),
false = lists:member({a,b,c}, List).
keymember(Config) when is_list(Config) ->
false = lists:keymember(anything_goes, 1, []),
{'EXIT',{badarg,_}} = (catch lists:keymember(anything_goes, -1, [])),
{'EXIT',{badarg,_}} = (catch lists:keymember(anything_goes, 0, [])),
{'EXIT',{badarg,_}} = (catch lists:keymember(anything_goes, 1, {1,2,3})),
List = [{52.0,a},{-19,b,c},{37.5,d},an_atom,42.0,{39},{45,{x,y,z}}],
false = lists:keymember(333, 5, List),
false = lists:keymember(333, 999, List),
false = lists:keymember(37, 1, List),
true = lists:keymember(52.0, 1, List),
true = lists:keymember(52, 1, List),
true = lists:keymember(-19, 1, List),
true = lists:keymember(-19.0, 1, List),
true = lists:keymember(37.5, 1, List),
true = lists:keymember(39, 1, List),
true = lists:keymember(39.0, 1, List),
true = lists:keymember(45, 1, List),
true = lists:keymember(45.0, 1, List),
true = lists:keymember(a, 2, List),
true = lists:keymember(b, 2, List),
true = lists:keymember(c, 3, List),
true = lists:keymember(d, 2, List),
true = lists:keymember({x,y,z}, 2, List),
Long0 = lists:seq(1, 100007),
false = lists:keymember(kalle, 1, Long0),
Long = lists:foldl(fun(E, A) -> [{1/E,E}|A] end, [], Long0),
true = lists:keymember(1, 2, Long),
true = lists:keymember(2, 2, Long),
true = lists:keymember(1.0, 2, Long),
true = lists:keymember(2.0, 2, Long),
true = lists:keymember(100006, 2, Long),
ok.
keysearch_keyfind(Config) when is_list(Config) ->
false = key_search_find(anything_goes, 1, []),
{'EXIT',{badarg,_}} = (catch key_search_find(anything_goes, -1, [])),
{'EXIT',{badarg,_}} = (catch key_search_find(anything_goes, 0, [])),
{'EXIT',{badarg,_}} = (catch key_search_find(anything_goes, 1, {1,2,3})),
First = {x,42.0},
Second = {y,-77},
Third = {z,[a,b,c],{5.0}},
List = [First,Second,Third],
false = key_search_find(333, 1, []),
false = key_search_find(333, 5, List),
false = key_search_find(333, 999, List),
false = key_search_find(37, 1, List),
{value,First} = key_search_find(42, 2, List),
{value,First} = key_search_find(42.0, 2, List),
{value,Second} = key_search_find(-77, 2, List),
{value,Second} = key_search_find(-77.0, 2, List),
{value,Third} = key_search_find(z, 1, List),
{value,Third} = key_search_find([a,b,c], 2, List),
{value,Third} = key_search_find({5}, 3, List),
{value,Third} = key_search_find({5.0}, 3, List),
Long0 = lists:seq(1, 100007),
false = key_search_find(kalle, 1, Long0),
Long = lists:foldl(fun(E, A) -> [{1/E,float(E)}|A] end, [], Long0),
{value,{_,1.0}} = key_search_find(1, 2, Long),
{value,{_,1.0}} = key_search_find(1.0, 2, Long),
{value,{_,2.0}} = key_search_find(2, 2, Long),
{value,{_,2.0}} = key_search_find(2.0, 2, Long),
{value,{_,33988.0}} = key_search_find(33988, 2, Long),
{value,{_,33988.0}} = key_search_find(33988.0, 2, Long),
ok.
%% Test both lists:keysearch/3 and lists:keyfind/3. The only
%% difference between these two functions is that lists:keysearch/3
%% wraps a successfully returned tuple in a value tuple.
%%
key_search_find(Key, Pos, List) ->
case lists:keyfind(Key, Pos, List) of
false ->
false = lists:keysearch(Key, Pos, List);
Tuple when is_tuple(Tuple) ->
{value,Tuple} = lists:keysearch(Key, Pos, List)
end.
dropwhile(Config) when is_list(Config) ->
F = fun(C) -> C =:= $@ end,
[] = lists:dropwhile(F, []),
[a] = lists:dropwhile(F, [a]),
[a,b] = lists:dropwhile(F, [a,b]),
[a,b,c] = lists:dropwhile(F, [a,b,c]),
[] = lists:dropwhile(F, [$@]),
[] = lists:dropwhile(F, [$@,$@]),
[a,$@] = lists:dropwhile(F, [$@,a,$@]),
[$k] = lists:dropwhile(F, [$@,$k]),
[$k,$l] = lists:dropwhile(F, [$@,$@,$k,$l]),
[a] = lists:dropwhile(F, [$@,$@,$@,a]),
[a,$@,b] = lists:dropwhile(F, [$@,a,$@,b]),
[a,$@,b] = lists:dropwhile(F, [$@,$@,a,$@,b]),
[a,$@,b] = lists:dropwhile(F, [$@,$@,$@,a,$@,b]),
Long = lists:seq(1, 1024),
Shorter = lists:seq(800, 1024),
Shorter = lists:dropwhile(fun(E) -> E < 800 end, Long),
ok.
takewhile(Config) when is_list(Config) ->
F = fun(C) -> C =/= $@ end,
[] = lists:takewhile(F, []),
[a] = lists:takewhile(F, [a]),
[a,b] = lists:takewhile(F, [a,b]),
[a,b,c] = lists:takewhile(F, [a,b,c]),
[] = lists:takewhile(F, [$@]),
[] = lists:takewhile(F, [$@,$@]),
[a] = lists:takewhile(F, [a,$@]),
[$k] = lists:takewhile(F, [$k,$@]),
[$k,$l] = lists:takewhile(F, [$k,$l,$@,$@]),
[a] = lists:takewhile(F, [a,$@,$@,$@]),
[] = lists:takewhile(F, [$@,a,$@,b]),
[] = lists:takewhile(F, [$@,$@,a,$@,b]),
[] = lists:takewhile(F, [$@,$@,$@,a,$@,b]),
Long = lists:seq(1, 1024),
Shorter = lists:seq(1, 400),
Shorter = lists:takewhile(fun(E) -> E =< 400 end, Long),
ok.
keystore(Config) when is_list(Config) ->
{'EXIT',_} = (catch lists:keystore(key, 0, [], {1})),
{'EXIT',_} = (catch lists:keystore(key, 1, {}, {})),
{'EXIT',_} = (catch lists:keystore(key, 1, {a,b}, {})),
{'EXIT', _} = (catch lists:keystore(a, 2, [{1,a}], b)),
T = {k,17},
[T] = lists:keystore(a, 2, [], T),
[{1,a},{2,b},{k,17}] = lists:keystore(c, 2, [{1,a},{2,b}],T),
L = [{1,a},{2,b},{3,c}],
[{k,17},{2,b},{3,c}] = lists:keystore(a, 2, L, T),
[{1,a},{k,17},{3,c}] = lists:keystore(b, 2, L, T),
[{1,a},{2,b},{k,17}] = lists:keystore(c, 2, L, T),
[{2,b}] = lists:keystore(a, 2, [{1,a}], {2,b}),
[{1,a}] = lists:keystore(foo, 1, [], {1,a}),
ok.
keytake(Config) when is_list(Config) ->
{'EXIT',_} = (catch lists:keytake(key, 0, [])),
{'EXIT',_} = (catch lists:keytake(key, 1, {})),
{'EXIT',_} = (catch lists:keytake(key, 1, {a,b})),
false = lists:keytake(key, 2, [{a}]),
false = lists:keytake(key, 1, [a]),
false = lists:keytake(k, 1, []),
false = lists:keytake(k, 1, [{a},{b},{c}]),
L = [{a,1},{b,2},{c,3}],
{value,{a,1},[{b,2},{c,3}]} = lists:keytake(1, 2, L),
{value,{b,2},[{a,1},{c,3}]} = lists:keytake(2, 2, L),
{value,{c,3},[{a,1},{b,2}]} = lists:keytake(3, 2, L),
false = lists:keytake(4, 2, L),
ok.
%% Test lists:keyreplace/4.
keyreplace(Config) when is_list(Config) ->
[{new,42}] = lists:keyreplace(k, 1, [{k,1}], {new,42}),
[atom,{new,a,b}] = lists:keyreplace(k, 1, [atom,{k,1}], {new,a,b}),
[a,{x,y,z}] = lists:keyreplace(a, 5, [a,{x,y,z}], {no,use}),
%% Error cases.
{'EXIT',_} = (catch lists:keyreplace(k, 1, [], not_tuple)),
{'EXIT',_} = (catch lists:keyreplace(k, 0, [], {a,b})),
ok.
merge(Config) when is_list(Config) ->
Singleton = id([a, b, c]),
%% merge list of lists
[] = lists:merge([]),
[] = lists:merge([[]]),
[] = lists:merge([[],[]]),
[] = lists:merge([[],[],[]]),
[1] = lists:merge([[1]]),
[1,1,2,2] = lists:merge([[1,2],[1,2]]),
[1] = lists:merge([[1],[],[]]),
[1] = lists:merge([[],[1],[]]),
[1] = lists:merge([[],[],[1]]),
[1,2] = lists:merge([[1],[2],[]]),
[1,2] = lists:merge([[1],[],[2]]),
[1,2] = lists:merge([[],[1],[2]]),
[1,2,3,4,5,6] = lists:merge([[1,2],[],[5,6],[],[3,4],[]]),
[1,2,3,4] = lists:merge([[4],[3],[2],[1]]),
[1,2,3,4,5] = lists:merge([[1],[2],[3],[4],[5]]),
[1,2,3,4,5,6] = lists:merge([[1],[2],[3],[4],[5],[6]]),
[1,2,3,4,5,6,7,8,9] =
lists:merge([[1],[2],[3],[4],[5],[6],[7],[8],[9]]),
Seq = lists:seq(1,100),
true = Seq == lists:merge(lists:map(fun(E) -> [E] end, Seq)),
true = erts_debug:same(Singleton, lists:merge([Singleton])),
true = erts_debug:same(Singleton, lists:merge([Singleton, []])),
true = erts_debug:same(Singleton, lists:merge([[], Singleton])),
true = erts_debug:same(Singleton, lists:merge([Singleton, [], []])),
true = erts_debug:same(Singleton, lists:merge([[], Singleton, []])),
true = erts_debug:same(Singleton, lists:merge([[], [], Singleton])),
{'EXIT', _} = (catch lists:merge([a])),
{'EXIT', _} = (catch lists:merge([a, b])),
{'EXIT', _} = (catch lists:merge([a, []])),
{'EXIT', _} = (catch lists:merge([[], b])),
{'EXIT', _} = (catch lists:merge([a, [1, 2, 3]])),
{'EXIT', _} = (catch lists:merge([[1, 2, 3], b])),
{'EXIT', _} = (catch lists:merge([a, b, c])),
{'EXIT', _} = (catch lists:merge([a, b, []])),
{'EXIT', _} = (catch lists:merge([a, [], c])),
{'EXIT', _} = (catch lists:merge([a, [], []])),
{'EXIT', _} = (catch lists:merge([[], b, c])),
{'EXIT', _} = (catch lists:merge([[], b, []])),
{'EXIT', _} = (catch lists:merge([[], [], c])),
{'EXIT', _} = (catch lists:merge([a, b, [1, 2, 3]])),
{'EXIT', _} = (catch lists:merge([a, [1, 2, 3], c])),
{'EXIT', _} = (catch lists:merge([a, [1, 2, 3], [4, 5, 6]])),
{'EXIT', _} = (catch lists:merge([[1, 2, 3], b, c])),
{'EXIT', _} = (catch lists:merge([[1, 2, 3], b, [4, 5, 6]])),
{'EXIT', _} = (catch lists:merge([[1, 2, 3], [4, 5, 6], c])),
Two = [1,2],
Six = [1,2,3,4,5,6],
%% 2-way merge
[] = lists:merge([], []),
Two = lists:merge(Two, []),
Two = lists:merge([], Two),
Six = lists:merge([1,3,5], [2,4,6]),
Six = lists:merge([2,4,6], [1,3,5]),
Six = lists:merge([1,2,3], [4,5,6]),
Six = lists:merge([4,5,6], [1,2,3]),
Six = lists:merge([1,2,5],[3,4,6]),
[1,2,3,5,7] = lists:merge([1,3,5,7], [2]),
[1,2,3,4,5,7] = lists:merge([1,3,5,7], [2,4]),
[1,2,3,4,5,6,7] = lists:merge([1,3,5,7], [2,4,6]),
[1,2,3,5,7] = lists:merge([2], [1,3,5,7]),
[1,2,3,4,5,7] = lists:merge([2,4], [1,3,5,7]),
[1,2,3,4,5,6,7] = lists:merge([2,4,6], [1,3,5,7]),
true = erts_debug:same(Singleton, lists:merge([], Singleton)),
true = erts_debug:same(Singleton, lists:merge(Singleton, [])),
{'EXIT', _} = (catch lists:merge(a, b)),
{'EXIT', _} = (catch lists:merge(a, [])),
{'EXIT', _} = (catch lists:merge([], b)),
{'EXIT', _} = (catch lists:merge(a, [1, 2, 3])),
{'EXIT', _} = (catch lists:merge([1, 2, 3], b)),
%% 3-way merge
[] = lists:merge3([], [], []),
Two = lists:merge3([], [], Two),
Two = lists:merge3([], Two, []),
Two = lists:merge3(Two, [], []),
Six = lists:merge3([], [1,3,5], [2,4,6]),
Six = lists:merge3([1,3,5], [], [2,4,6]),
Six = lists:merge3([1,3,5], [2,4,6], []),
Nine = lists:merge3([1,4,7],[2,5,8],[3,6,9]),
Nine = lists:merge3([1,4,7],[3,6,9],[2,5,8]),
Nine = lists:merge3([3,6,9],[1,4,7],[2,5,8]),
Nine = lists:merge3([4,5,6],[1,2,3],[7,8,9]),
Nine = lists:merge3([1,2,3],[4,5,6],[7,8,9]),
Nine = lists:merge3([7,8,9],[4,5,6],[1,2,3]),
Nine = lists:merge3([4,5,6],[7,8,9],[1,2,3]),
true = erts_debug:same(Singleton, lists:merge3([], [], Singleton)),
true = erts_debug:same(Singleton, lists:merge3([], Singleton, [])),
true = erts_debug:same(Singleton, lists:merge3(Singleton, [], [])),
{'EXIT', _} = (catch lists:merge3(a, b, c)),
{'EXIT', _} = (catch lists:merge3(a, b, [])),
{'EXIT', _} = (catch lists:merge3(a, [], c)),
{'EXIT', _} = (catch lists:merge3(a, [], [])),
{'EXIT', _} = (catch lists:merge3([], b, [])),
{'EXIT', _} = (catch lists:merge3([], [], c)),
{'EXIT', _} = (catch lists:merge3(a, b, [1, 2, 3])),
{'EXIT', _} = (catch lists:merge3(a, [1, 2, 3], c)),
{'EXIT', _} = (catch lists:merge3(a, [1, 2, 3], [4, 5, 6])),
{'EXIT', _} = (catch lists:merge3([1, 2, 3], b, [4, 5, 6])),
{'EXIT', _} = (catch lists:merge3([1, 2, 3], [4, 5, 6], c)),
ok.
%% reverse merge functions
rmerge(Config) when is_list(Config) ->
Singleton = id([a, b, c]),
Two = [2,1],
Six = [6,5,4,3,2,1],
%% 2-way reversed merge
[] = lists:rmerge([], []),
Two = lists:rmerge(Two, []),
Two = lists:rmerge([], Two),
Six = lists:rmerge([5,3,1], [6,4,2]),
Six = lists:rmerge([6,4,2], [5,3,1]),
Six = lists:rmerge([3,2,1], [6,5,4]),
Six = lists:rmerge([6,5,4], [3,2,1]),
Six = lists:rmerge([4,3,2],[6,5,1]),
[7,6,5,3,1] = lists:rmerge([7,5,3,1], [6]),
[7,6,5,4,3,1] = lists:rmerge([7,5,3,1], [6,4]),
[7,6,5,4,3,2,1] = lists:rmerge([7,5,3,1], [6,4,2]),
[7,5,3,2,1] = lists:rmerge([2], [7,5,3,1]),
[7,5,4,3,2,1] = lists:rmerge([4,2], [7,5,3,1]),
[7,6,5,4,3,2,1] = lists:rmerge([6,4,2], [7,5,3,1]),
true = erts_debug:same(Singleton, lists:rmerge([], Singleton)),
true = erts_debug:same(Singleton, lists:rmerge(Singleton, [])),
{'EXIT', _} = (catch lists:rmerge(a, b)),
{'EXIT', _} = (catch lists:rmerge(a, [])),
{'EXIT', _} = (catch lists:rmerge([], b)),
{'EXIT', _} = (catch lists:rmerge(a, [1, 2, 3])),
{'EXIT', _} = (catch lists:rmerge([1, 2, 3], b)),
Nine = [9,8,7,6,5,4,3,2,1],
%% 3-way reversed merge
[] = lists:rmerge3([], [], []),
Two = lists:rmerge3([], [], Two),
Two = lists:rmerge3([], Two, []),
Two = lists:rmerge3(Two, [], []),
Six = lists:rmerge3([], [5,3,1], [6,4,2]),
Six = lists:rmerge3([5,3,1], [], [6,4,2]),
Six = lists:rmerge3([5,3,1], [6,4,2], []),
Nine = lists:rmerge3([7,4,1],[8,5,2],[9,6,3]),
Nine = lists:rmerge3([7,4,1],[9,6,3],[8,5,2]),
Nine = lists:rmerge3([9,6,3],[7,4,1],[8,5,2]),
Nine = lists:rmerge3([6,5,4],[3,2,1],[9,8,7]),
Nine = lists:rmerge3([3,2,1],[6,5,4],[9,8,7]),
Nine = lists:rmerge3([9,8,7],[6,5,4],[3,2,1]),
Nine = lists:rmerge3([6,5,4],[9,8,7],[3,2,1]),
true = erts_debug:same(Singleton, lists:rmerge3([], [], Singleton)),
true = erts_debug:same(Singleton, lists:rmerge3([], Singleton, [])),
true = erts_debug:same(Singleton, lists:rmerge3(Singleton, [], [])),
{'EXIT', _} = (catch lists:rmerge3(a, b, c)),
{'EXIT', _} = (catch lists:rmerge3(a, b, [])),
{'EXIT', _} = (catch lists:rmerge3(a, [], c)),
{'EXIT', _} = (catch lists:rmerge3(a, [], [])),
{'EXIT', _} = (catch lists:rmerge3([], b, [])),
{'EXIT', _} = (catch lists:rmerge3([], [], c)),
{'EXIT', _} = (catch lists:rmerge3(a, b, [1, 2, 3])),
{'EXIT', _} = (catch lists:rmerge3(a, [1, 2, 3], c)),
{'EXIT', _} = (catch lists:rmerge3(a, [1, 2, 3], [4, 5, 6])),
{'EXIT', _} = (catch lists:rmerge3([1, 2, 3], b, [4, 5, 6])),
{'EXIT', _} = (catch lists:rmerge3([1, 2, 3], [4, 5, 6], c)),
ok.
sort_1(Config) when is_list(Config) ->
[] = lists:sort([]),
[a] = lists:sort([a]),
[a,a] = lists:sort([a,a]),
[a,b] = lists:sort([a,b]),
[a,b] = lists:sort([b,a]),
[1,1] = lists:sort([1,1]),
[1,1,2,3] = lists:sort([1,1,3,2]),
[1,2,3,3] = lists:sort([3,3,1,2]),
[1,1,1,1] = lists:sort([1,1,1,1]),
[1,1,1,2,2,2,3,3,3] = lists:sort([3,3,3,2,2,2,1,1,1]),
[1,1,1,2,2,2,3,3,3] = lists:sort([1,1,1,2,2,2,3,3,3]),
lists:foreach(fun check/1, perms([1,2,3])),
lists:foreach(fun check/1, perms([1,2,3,4,5,6,7,8])),
ok.
%% sort/1 on big randomized lists
sort_rand(Config) when is_list(Config) ->
ok = check(biglist(10)),
ok = check(biglist(100)),
ok = check(biglist(1000)),
ok = check(biglist(10000)),
ok.
check([]) ->
ok;
check(L) ->
S = lists:sort(L),
case {length(L) == length(S), check(hd(S), tl(S))} of
{true,ok} ->
ok;
_ ->
io:format("~w~n", [L]),
erlang:error(check)
end.
check(_A, []) ->
ok;
check(A, [B | L]) when A =< B ->
check(B, L);
check(_A, _L) ->
no.
usort_1(Conf) when is_list(Conf) ->
[] = lists:usort([]),
[1] = lists:usort([1]),
[1] = lists:usort([1,1]),
[1] = lists:usort([1,1,1,1,1]),
[1,2] = lists:usort([1,2]),
[1,2] = lists:usort([1,2,1]),
[1,2] = lists:usort([1,2,2]),
[1,2,3] = lists:usort([1,3,2]),
[1,3] = lists:usort([3,1,3]),
[0,1,3] = lists:usort([3,1,0]),
[1,2,3] = lists:usort([3,1,2]),
[1,2] = lists:usort([2,1,1]),
[1,2] = lists:usort([2,1]),
[0,3,4,8,9] = lists:usort([3,8,9,0,9,4]),
lists:foreach(fun ucheck/1, perms([1,2,3])),
lists:foreach(fun ucheck/1, perms([1,2,3,4,5,6,2,1])),
ok.
umerge(Conf) when is_list(Conf) ->
Singleton = id([a, b, c]),
%% merge list of lists
[] = lists:umerge([]),
[] = lists:umerge([[]]),
[] = lists:umerge([[],[]]),
[] = lists:umerge([[],[],[]]),
[1] = lists:umerge([[1]]),
[1,2] = lists:umerge([[1,2],[1,2]]),
[1] = lists:umerge([[1],[],[]]),
[1] = lists:umerge([[],[1],[]]),
[1] = lists:umerge([[],[],[1]]),
[1,2] = lists:umerge([[1],[2],[]]),
[1,2] = lists:umerge([[1],[],[2]]),
[1,2] = lists:umerge([[],[1],[2]]),
[1,2,3,4,5,6] = lists:umerge([[1,2],[],[5,6],[],[3,4],[]]),
[1,2,3,4] = lists:umerge([[4],[3],[2],[1]]),
[1,2,3,4,5] = lists:umerge([[1],[2],[3],[4],[5]]),
[1,2,3,4,5,6] = lists:umerge([[1],[2],[3],[4],[5],[6]]),
[1,2,3,4,5,6,7,8,9] =
lists:umerge([[1],[2],[3],[4],[5],[6],[7],[8],[9]]),
[1,2,4,6,8] = lists:umerge([[1,2],[2,4,6,8]]),
Seq = lists:seq(1,100),
true = Seq == lists:umerge(lists:map(fun(E) -> [E] end, Seq)),
true = erts_debug:same(Singleton, lists:umerge([Singleton])),
true = erts_debug:same(Singleton, lists:umerge([Singleton, []])),
true = erts_debug:same(Singleton, lists:umerge([[], Singleton])),
true = erts_debug:same(Singleton, lists:umerge([Singleton, [], []])),
true = erts_debug:same(Singleton, lists:umerge([[], Singleton, []])),
true = erts_debug:same(Singleton, lists:umerge([[], [], Singleton])),
{'EXIT', _} = (catch lists:umerge([a])),
{'EXIT', _} = (catch lists:umerge([a, b])),
{'EXIT', _} = (catch lists:umerge([a, []])),
{'EXIT', _} = (catch lists:umerge([[], b])),
{'EXIT', _} = (catch lists:umerge([a, [1, 2, 3]])),
{'EXIT', _} = (catch lists:umerge([[1, 2, 3], b])),
{'EXIT', _} = (catch lists:umerge([a, b, c])),
{'EXIT', _} = (catch lists:umerge([a, b, []])),
{'EXIT', _} = (catch lists:umerge([a, [], c])),
{'EXIT', _} = (catch lists:umerge([a, [], []])),
{'EXIT', _} = (catch lists:umerge([[], b, c])),
{'EXIT', _} = (catch lists:umerge([[], b, []])),
{'EXIT', _} = (catch lists:umerge([[], [], c])),
{'EXIT', _} = (catch lists:umerge([a, b, [1, 2, 3]])),
{'EXIT', _} = (catch lists:umerge([a, [1, 2, 3], c])),
{'EXIT', _} = (catch lists:umerge([a, [1, 2, 3], [4, 5, 6]])),
{'EXIT', _} = (catch lists:umerge([[1, 2, 3], b, c])),
{'EXIT', _} = (catch lists:umerge([[1, 2, 3], b, [4, 5, 6]])),
{'EXIT', _} = (catch lists:umerge([[1, 2, 3], [4, 5, 6], c])),
Two = [1,2],
Six = [1,2,3,4,5,6],
%% 2-way unique merge
[] = lists:umerge([], []),
Two = lists:umerge(Two, []),
Two = lists:umerge([], Two),
Six = lists:umerge([1,3,5], [2,4,6]),
Six = lists:umerge([2,4,6], [1,3,5]),
Six = lists:umerge([1,2,3], [4,5,6]),
Six = lists:umerge([4,5,6], [1,2,3]),
Six = lists:umerge([1,2,5],[3,4,6]),
[1,2,3,5,7] = lists:umerge([1,3,5,7], [2]),
[1,2,3,4,5,7] = lists:umerge([1,3,5,7], [2,4]),
[1,2,3,4,5,6,7] = lists:umerge([1,3,5,7], [2,4,6]),
[1,2,3,5,7] = lists:umerge([2], [1,3,5,7]),
[1,2,3,4,5,7] = lists:umerge([2,4], [1,3,5,7]),
[1,2,3,4,5,6,7] = lists:umerge([2,4,6], [1,3,5,7]),
[1,2,3,5,7] = lists:umerge([1,2,3,5,7], [2]),
[1,2,3,4,5,7] = lists:umerge([1,2,3,4,5,7], [2,4]),
[1,2,3,4,5,6,7] = lists:umerge([1,2,3,4,5,6,7], [2,4,6]),
[1,2,3,5,7] = lists:umerge([2], [1,2,3,5,7]),
[1,2,3,4,5,7] = lists:umerge([2,4], [1,2,3,4,5,7]),
[1,2,3,4,5,6,7] = lists:umerge([2,4,6], [1,2,3,4,5,6,7]),
true = erts_debug:same(Singleton, lists:umerge([], Singleton)),
true = erts_debug:same(Singleton, lists:umerge(Singleton, [])),
{'EXIT', _} = (catch lists:umerge(a, b)),
{'EXIT', _} = (catch lists:umerge(a, [])),
{'EXIT', _} = (catch lists:umerge([], b)),
{'EXIT', _} = (catch lists:umerge(a, [1, 2, 3])),
{'EXIT', _} = (catch lists:umerge([1, 2, 3], b)),
%% 3-way unique merge
[] = lists:umerge3([], [], []),
Two = lists:umerge3([], [], Two),
Two = lists:umerge3([], Two, []),
Two = lists:umerge3(Two, [], []),
Six = lists:umerge3([], [1,3,5], [2,4,6]),
Six = lists:umerge3([1,3,5], [], [2,4,6]),
Six = lists:umerge3([1,3,5], [2,4,6], []),
Nine = lists:umerge3([1,4,7],[2,5,8],[3,6,9]),
Nine = lists:umerge3([1,4,7],[3,6,9],[2,5,8]),
Nine = lists:umerge3([3,6,9],[1,4,7],[2,5,8]),
Nine = lists:umerge3([4,5,6],[1,2,3],[7,8,9]),
Nine = lists:umerge3([1,2,3],[4,5,6],[7,8,9]),
Nine = lists:umerge3([7,8,9],[4,5,6],[1,2,3]),
Nine = lists:umerge3([4,5,6],[7,8,9],[1,2,3]),
[1,2,3] = lists:umerge3([1,2,3],[1,2,3],[1,2,3]),
[1,2,3,4] = lists:umerge3([2,3,4],[1,2,3],[2,3,4]),
[1,2,3] = lists:umerge3([1,2,3],[2,3],[1,2,3]),
[1,2,3,4] = lists:umerge3([2,3,4],[3,4],[1,2,3]),
true = erts_debug:same(Singleton, lists:umerge3([], [], Singleton)),
true = erts_debug:same(Singleton, lists:umerge3([], Singleton, [])),
true = erts_debug:same(Singleton, lists:umerge3(Singleton, [], [])),
{'EXIT', _} = (catch lists:umerge3(a, b, c)),
{'EXIT', _} = (catch lists:umerge3(a, b, [])),
{'EXIT', _} = (catch lists:umerge3(a, [], c)),
{'EXIT', _} = (catch lists:umerge3(a, [], [])),
{'EXIT', _} = (catch lists:umerge3([], b, [])),
{'EXIT', _} = (catch lists:umerge3([], [], c)),
{'EXIT', _} = (catch lists:umerge3(a, b, [1, 2, 3])),
{'EXIT', _} = (catch lists:umerge3(a, [1, 2, 3], c)),
{'EXIT', _} = (catch lists:umerge3(a, [1, 2, 3], [4, 5, 6])),
{'EXIT', _} = (catch lists:umerge3([1, 2, 3], b, [4, 5, 6])),
{'EXIT', _} = (catch lists:umerge3([1, 2, 3], [4, 5, 6], c)),
ok.
rumerge(Conf) when is_list(Conf) ->
Singleton = id([a, b, c]),
Two = [2,1],
Six = [6,5,4,3,2,1],
%% 2-way reversed unique merge
[] = lists:rumerge([], []),
Two = lists:rumerge(Two, []),
Two = lists:rumerge([], Two),
Six = lists:rumerge([5,3,1], [6,4,2]),
Six = lists:rumerge([6,4,2], [5,3,1]),
Six = lists:rumerge([3,2,1], [6,5,4]),
Six = lists:rumerge([6,5,4], [3,2,1]),
Six = lists:rumerge([4,3,2],[6,5,1]),
[7,6,5,3,1] = lists:rumerge([7,5,3,1], [6]),
[7,6,5,4,3,1] = lists:rumerge([7,5,3,1], [6,4]),
[7,6,5,4,3,2,1] = lists:rumerge([7,5,3,1], [6,4,2]),
[7,5,3,2,1] = lists:rumerge([2], [7,5,3,1]),
[7,5,4,3,2,1] = lists:rumerge([4,2], [7,5,3,1]),
[7,6,5,4,3,2,1] = lists:rumerge([6,4,2], [7,5,3,1]),
[7,6,5,3,1] = lists:rumerge([7,6,5,3,1], [6]),
[7,6,5,4,3,1] = lists:rumerge([7,6,5,4,3,1], [6,4]),
[7,6,5,4,3,2,1] = lists:rumerge([7,6,5,4,3,2,1], [6,4,2]),
[7,5,3,2,1] = lists:rumerge([2], [7,5,3,2,1]),
[7,5,4,3,2,1] = lists:rumerge([4,2], [7,5,4,3,2,1]),
[7,6,5,4,3,2,1] = lists:rumerge([6,4,2], [7,6,5,4,3,2,1]),
true = erts_debug:same(Singleton, lists:rumerge([], Singleton)),
true = erts_debug:same(Singleton, lists:rumerge(Singleton, [])),
{'EXIT', _} = (catch lists:rumerge(a, b)),
{'EXIT', _} = (catch lists:rumerge(a, [])),
{'EXIT', _} = (catch lists:rumerge([], b)),
{'EXIT', _} = (catch lists:rumerge(a, [1, 2, 3])),
{'EXIT', _} = (catch lists:rumerge([1, 2, 3], b)),
Nine = [9,8,7,6,5,4,3,2,1],
%% 3-way reversed unique merge
[] = lists:rumerge3([], [], []),
Two = lists:rumerge3([], [], Two),
Two = lists:rumerge3([], Two, []),
Two = lists:rumerge3(Two, [], []),
Six = lists:rumerge3([], [5,3,1], [6,4,2]),
Six = lists:rumerge3([5,3,1], [], [6,4,2]),
Six = lists:rumerge3([5,3,1], [6,4,2], []),
Nine = lists:rumerge3([7,4,1],[8,5,2],[9,6,3]),
Nine = lists:rumerge3([7,4,1],[9,6,3],[8,5,2]),
Nine = lists:rumerge3([9,6,3],[7,4,1],[8,5,2]),
Nine = lists:rumerge3([6,5,4],[3,2,1],[9,8,7]),
Nine = lists:rumerge3([3,2,1],[6,5,4],[9,8,7]),
Nine = lists:rumerge3([9,8,7],[6,5,4],[3,2,1]),
Nine = lists:rumerge3([6,5,4],[9,8,7],[3,2,1]),
[3,2,1] = lists:rumerge3([3,2,1],[3,2,1],[3,2,1]),
[4,3,2,1] = lists:rumerge3([4,3,2],[3,2,1],[3,2,1]),
[5,4,3,2,1] = lists:rumerge3([4,3,2],[5,4,3,2],[5,4,3,2,1]),
[6,5,4,3,2] = lists:rumerge3([4,3,2],[5,4,3,2],[6,5,4,3]),
L1 = [c,d,e],
L2 = [b,c,d],
true =
lists:umerge(L1, L2) ==
lists:reverse(lists:rumerge(lists:reverse(L1), lists:reverse(L2))),
true = erts_debug:same(Singleton, lists:rumerge3([], [], Singleton)),
true = erts_debug:same(Singleton, lists:rumerge3([], Singleton, [])),
true = erts_debug:same(Singleton, lists:rumerge3(Singleton, [], [])),
{'EXIT', _} = (catch lists:rumerge3(a, b, c)),
{'EXIT', _} = (catch lists:rumerge3(a, b, [])),
{'EXIT', _} = (catch lists:rumerge3(a, [], c)),
{'EXIT', _} = (catch lists:rumerge3(a, [], [])),
{'EXIT', _} = (catch lists:rumerge3([], b, [])),
{'EXIT', _} = (catch lists:rumerge3([], [], c)),
{'EXIT', _} = (catch lists:rumerge3(a, b, [1, 2, 3])),
{'EXIT', _} = (catch lists:rumerge3(a, [1, 2, 3], c)),
{'EXIT', _} = (catch lists:rumerge3(a, [1, 2, 3], [4, 5, 6])),
{'EXIT', _} = (catch lists:rumerge3([1, 2, 3], b, [4, 5, 6])),
{'EXIT', _} = (catch lists:rumerge3([1, 2, 3], [4, 5, 6], c)),
ok.
%% usort/1 on big randomized lists.
usort_rand(Config) when is_list(Config) ->
ok = ucheck(biglist(10)),
ok = ucheck(biglist(100)),
ok = ucheck(biglist(1000)),
ok = ucheck(biglist(10000)),
ok = ucheck(ubiglist(10)),
ok = ucheck(ubiglist(100)),
ok = ucheck(ubiglist(1000)),
ok = ucheck(ubiglist(10000)),
ok.
ucheck([]) ->
ok;
ucheck(L) ->
S = lists:usort(L),
case ucheck(hd(S), tl(S)) of
ok ->
ok;
_ ->
io:format("~w~n", [L]),
erlang:error(ucheck)
end.
ucheck(_A, []) ->
ok;
ucheck(A, [B | L]) when A < B ->
ucheck(B, L);
ucheck(_A, _L) ->
no.
%% Key merge two lists.
keymerge(Config) when is_list(Config) ->
Singleton = id([{1, a}, {2, b}, {3, c}]),
Two = [{1,a},{2,b}],
Six = [{1,a},{2,b},{3,c},{4,d},{5,e},{6,f}],
%% 2-way keymerge
[] = lists:keymerge(1, [], []),
Two = lists:keymerge(1, Two, []),
Two = lists:keymerge(1, [], Two),
Six = lists:keymerge(1, [{1,a},{3,c},{5,e}], [{2,b},{4,d},{6,f}]),
Six = lists:keymerge(1, [{2,b},{4,d},{6,f}], [{1,a},{3,c},{5,e}]),
Six = lists:keymerge(1, [{1,a},{2,b},{3,c}], [{4,d},{5,e},{6,f}]),
Six = lists:keymerge(1, [{4,d},{5,e},{6,f}], [{1,a},{2,b},{3,c}]),
Six = lists:keymerge(1, [{1,a},{2,b},{5,e}],[{3,c},{4,d},{6,f}]),
[{1,a},{2,b},{3,c},{5,e},{7,g}] =
lists:keymerge(1, [{1,a},{3,c},{5,e},{7,g}], [{2,b}]),
[{1,a},{2,b},{3,c},{4,d},{5,e},{7,g}] =
lists:keymerge(1, [{1,a},{3,c},{5,e},{7,g}], [{2,b},{4,d}]),
[{1,a},{2,b},{3,c},{4,d},{5,e},{6,f},{7,g}] =
lists:keymerge(1, [{1,a},{3,c},{5,e},{7,g}], [{2,b},{4,d},{6,f}]),
[{1,a},{2,b},{3,c},{5,e},{7,g}] =
lists:keymerge(1, [{2,b}], [{1,a},{3,c},{5,e},{7,g}]),
[{1,a},{2,b},{3,c},{4,d},{5,e},{7,g}] =
lists:keymerge(1, [{2,b},{4,d}], [{1,a},{3,c},{5,e},{7,g}]),
[{1,a},{2,b},{3,c},{4,d},{5,e},{6,f},{7,g}] =
lists:keymerge(1, [{2,b},{4,d},{6,f}], [{1,a},{3,c},{5,e},{7,g}]),
[{b,2},{c,11},{c,12},{c,21},{c,22},{e,5}] =
lists:keymerge(1,[{c,11},{c,12},{e,5}], [{b,2},{c,21},{c,22}]),
true = erts_debug:same(Singleton, lists:keymerge(1, Singleton, [])),
true = erts_debug:same(Singleton, lists:keymerge(1, [], Singleton)),
{'EXIT', _} = (catch lists:keymerge(1, a, b)),
{'EXIT', _} = (catch lists:keymerge(1, a, [])),
{'EXIT', _} = (catch lists:keymerge(1, [], b)),
{'EXIT', _} = (catch lists:keymerge(1, a, [{1, a}, {2, b}, {3, c}])),
{'EXIT', _} = (catch lists:keymerge(1, [{1, a}, {2, b}, {3, c}], b)),
ok.
%% Reverse key merge two lists.
rkeymerge(Config) when is_list(Config) ->
Singleton = id([{1, a}, {2, b}, {3, c}]),
Two = [{2,b},{1,a}],
Six = [{6,f},{5,e},{4,d},{3,c},{2,b},{1,a}],
%% 2-way reversed keymerge
[] = lists:rkeymerge(1, [], []),
Two = lists:rkeymerge(1, Two, []),
Two = lists:rkeymerge(1, [], Two),
Six = lists:rkeymerge(1, [{5,e},{3,c},{1,a}], [{6,f},{4,d},{2,b}]),
Six = lists:rkeymerge(1, [{6,f},{4,d},{2,b}], [{5,e},{3,c},{1,a}]),
Six = lists:rkeymerge(1, [{3,c},{2,b},{1,a}], [{6,f},{5,e},{4,d}]),
Six = lists:rkeymerge(1, [{6,f},{5,e},{4,d}], [{3,c},{2,b},{1,a}]),
Six = lists:rkeymerge(1, [{4,d},{3,c},{2,b}],[{6,f},{5,e},{1,a}]),
[{7,g},{6,f},{5,e},{3,c},{1,a}] =
lists:rkeymerge(1, [{7,g},{5,e},{3,c},{1,a}], [{6,f}]),
[{7,g},{6,f},{5,e},{4,d},{3,c},{1,a}] =
lists:rkeymerge(1, [{7,g},{5,e},{3,c},{1,a}], [{6,f},{4,d}]),
[{7,g},{6,f},{5,e},{4,d},{3,c},{2,b},{1,a}] =
lists:rkeymerge(1, [{7,g},{5,e},{3,c},{1,a}], [{6,f},{4,d},{2,b}]),
[{7,g},{5,e},{3,c},{2,b},{1,a}] =
lists:rkeymerge(1, [{2,b}], [{7,g},{5,e},{3,c},{1,a}]),
[{7,g},{5,e},{4,d},{3,c},{2,b},{1,a}] =
lists:rkeymerge(1, [{4,d},{2,b}], [{7,g},{5,e},{3,c},{1,a}]),
[{7,g},{6,f},{5,e},{4,d},{3,c},{2,b},{1,a}] =
lists:rkeymerge(1, [{6,f},{4,d},{2,b}], [{7,g},{5,e},{3,c},{1,a}]),
L1 = [{c,11},{c,12},{e,5}],
L2 = [{b,2},{c,21},{c,22}],
true =
lists:keymerge(1, L1, L2) ==
lists:reverse(lists:rkeymerge(1,lists:reverse(L1),
lists:reverse(L2))),
true = erts_debug:same(Singleton, lists:rkeymerge(1, Singleton, [])),
true = erts_debug:same(Singleton, lists:rkeymerge(1, [], Singleton)),