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-rw-r--r--erts/emulator/test/hash_SUITE.erl139
1 files changed, 58 insertions, 81 deletions
diff --git a/erts/emulator/test/hash_SUITE.erl b/erts/emulator/test/hash_SUITE.erl
index 43c9d64af7..a39d101b0d 100644
--- a/erts/emulator/test/hash_SUITE.erl
+++ b/erts/emulator/test/hash_SUITE.erl
@@ -1,19 +1,19 @@
-%% -*- coding: utf-8 -*-
%%
%% %CopyrightBegin%
%%
-%% Copyright Ericsson AB 2000-2013. All Rights Reserved.
+%% Copyright Ericsson AB 2000-2016. All Rights Reserved.
%%
-%% The contents of this file are subject to the Erlang Public License,
-%% Version 1.1, (the "License"); you may not use this file except in
-%% compliance with the License. You should have received a copy of the
-%% Erlang Public License along with this software. If not, it can be
-%% retrieved online at http://www.erlang.org/.
-%%
-%% Software distributed under the License is distributed on an "AS IS"
-%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
-%% the License for the specific language governing rights and limitations
-%% under the License.
+%% 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%
%%
@@ -32,7 +32,7 @@
%%
-module(hash_SUITE).
-export([basic_test/0,cmp_test/1,range_test/0,spread_test/1,
- phash2_test/0, otp_5292_test/0, bit_level_binaries/0,
+ phash2_test/0, otp_5292_test/0,
otp_7127_test/0]).
-compile({nowarn_deprecated_function, {erlang,hash,2}}).
@@ -50,7 +50,7 @@
-define(config(A,B),config(A,B)).
-export([config/2]).
-else.
--include_lib("test_server/include/test_server.hrl").
+-include_lib("common_test/include/ct.hrl").
-endif.
-ifdef(debug).
@@ -70,97 +70,56 @@ config(priv_dir,_) ->
".".
-else.
%% When run in test server.
--export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
- init_per_group/2,end_per_group/2,
+-export([all/0, suite/0,
test_basic/1,test_cmp/1,test_range/1,test_spread/1,
test_phash2/1,otp_5292/1,bit_level_binaries/1,otp_7127/1,
- end_per_testcase/2,init_per_testcase/2]).
-init_per_testcase(_Case, Config) ->
- Dog=test_server:timetrap(test_server:minutes(10)),
- [{watchdog, Dog}|Config].
-
-end_per_testcase(_Case, Config) ->
- Dog=?config(watchdog, Config),
- test_server:timetrap_cancel(Dog),
- ok.
-suite() -> [{ct_hooks,[ts_install_cth]}].
+ test_hash_zero/1]).
+
+suite() ->
+ [{ct_hooks,[ts_install_cth]},
+ {timetrap, {minutes, 10}}].
all() ->
[test_basic, test_cmp, test_range, test_spread,
- test_phash2, otp_5292, bit_level_binaries, otp_7127].
-
-groups() ->
- [].
-
-init_per_suite(Config) ->
- Config.
+ test_phash2, otp_5292, bit_level_binaries, otp_7127,
+ test_hash_zero].
-end_per_suite(_Config) ->
- ok.
-
-init_per_group(_GroupName, Config) ->
- Config.
-
-end_per_group(_GroupName, Config) ->
- Config.
-
-
-test_basic(suite) ->
- [];
-test_basic(doc) ->
- ["Tests basic functionality of erlang:phash and that the "
- "hashes has not changed (neither hash nor phash)"];
+%% Tests basic functionality of erlang:phash and that the
+%% hashes has not changed (neither hash nor phash)
test_basic(Config) when is_list(Config) ->
basic_test().
-test_cmp(suite) ->
- [];
-test_cmp(doc) ->
- ["Compares integer hashes made by erlang:phash with those of a reference "
- "implementation"];
+%% Compares integer hashes made by erlang:phash with those of a reference implementation
test_cmp(Config) when is_list(Config) ->
cmp_test(10000).
-test_range(suite) ->
- [];
-test_range(doc) ->
- ["Tests ranges on erlang:phash from 1 to 2^32"];
+%% Tests ranges on erlang:phash from 1 to 2^32
test_range(Config) when is_list(Config) ->
range_test().
-test_spread(suite) ->
- [];
-test_spread(doc) ->
- ["Tests that the hashes are spread ok"];
+%% Tests that the hashes are spread ok
test_spread(Config) when is_list(Config) ->
spread_test(10).
-test_phash2(suite) ->
- [];
-test_phash2(doc) ->
- ["Tests phash2"];
+%% Tests phash2
test_phash2(Config) when is_list(Config) ->
phash2_test().
-otp_5292(suite) ->
- [];
-otp_5292(doc) ->
- ["Tests hash, phash and phash2 regarding integers."];
+%% Tests hash, phash and phash2 regarding integers.
otp_5292(Config) when is_list(Config) ->
otp_5292_test().
%% Test hashing bit-level binaries.
bit_level_binaries(Config) when is_list(Config) ->
- bit_level_binaries().
+ bit_level_binaries_do().
-otp_7127(suite) ->
- [];
-otp_7127(doc) ->
- ["Tests phash2/1."];
+%% Tests phash2/1.
otp_7127(Config) when is_list(Config) ->
otp_7127_test().
+test_hash_zero(Config) when is_list(Config) ->
+ hash_zero_test().
-endif.
@@ -218,11 +177,10 @@ basic_test() ->
range_test() ->
- random:seed(),
F = fun(From,From,_FF) ->
ok;
(From,To,FF) ->
- R = random:uniform(16#FFFFFFFFFFFFFFFF),
+ R = rand:uniform(16#FFFFFFFFFFFFFFFF),
X = erlang:phash(R, From),
Y = erlang:phash(R, 16#100000000) - 1,
Z = (Y rem From) + 1,
@@ -260,14 +218,13 @@ spread_test(N) ->
cmp_test(N) ->
- % No need to save seed, the error indicates what number caused it.
- random:seed(),
do_cmp_hashes(N,8).
+
do_cmp_hashes(0,_) ->
ok;
do_cmp_hashes(N,Steps) ->
- R0 = random:uniform(1 bsl Steps - 1) + random:uniform(16#FFFFFFFF),
- R = case random:uniform(2) of
+ R0 = rand:uniform(1 bsl Steps - 1) + rand:uniform(16#FFFFFFFF),
+ R = case rand:uniform(2) of
1 ->
R0;
_ ->
@@ -537,7 +494,7 @@ hash_int(Start, End, F) ->
md5(T) ->
erlang:md5(term_to_binary(T)).
-bit_level_binaries() ->
+bit_level_binaries_do() ->
[3511317,7022633,14044578,28087749,56173436,112344123,90467083|_] =
bit_level_all_different(fun erlang:hash/2),
[3511317,7022633,14044578,28087749,56173436,112344123,90467083|_] =
@@ -592,6 +549,26 @@ otp_7127_test() ->
38990304 = erlang:phash2(<<"Scott9">>),
ok.
+hash_zero_test() ->
+ Zs = [0.0, -0.0, 0/-1, 0.0/-1, 0/-(1 bsl 65),
+ binary_to_term(<<131,70,0,0,0,0,0,0,0,0>>), %% +0.0
+ binary_to_term(<<131,70,128,0,0,0,0,0,0,0>>)], %% -0.0
+ ok = hash_zero_test(Zs,fun(T) -> erlang:phash2(T, 1 bsl 32) end),
+ ok = hash_zero_test(Zs,fun(T) -> erlang:phash(T, 1 bsl 32) end),
+ ok = hash_zero_test(Zs,fun(T) -> erlang:hash(T, (1 bsl 27) - 1) end),
+ ok.
+
+hash_zero_test([Z|Zs],F) ->
+ hash_zero_test(Zs,Z,F(Z),F).
+hash_zero_test([Z|Zs],Z0,V,F) ->
+ true = Z0 =:= Z, %% assert exact equal
+ Z0 = Z, %% assert matching
+ V = F(Z), %% assert hash
+ hash_zero_test(Zs,Z0,V,F);
+hash_zero_test([],_,_,_) ->
+ ok.
+
+
%%
%% Reference implementation of integer hashing
%%
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 18:40:24 +0000