diff options
Diffstat (limited to 'erts/emulator/test/hash_SUITE.erl')
| -rw-r--r-- | erts/emulator/test/hash_SUITE.erl | 55 |
1 files changed, 40 insertions, 15 deletions
diff --git a/erts/emulator/test/hash_SUITE.erl b/erts/emulator/test/hash_SUITE.erl index 43c9d64af7..2ea49467b8 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. %% -%% 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}}). @@ -74,6 +74,7 @@ config(priv_dir,_) -> init_per_group/2,end_per_group/2, 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, + test_hash_zero/1, end_per_testcase/2,init_per_testcase/2]). init_per_testcase(_Case, Config) -> Dog=test_server:timetrap(test_server:minutes(10)), @@ -87,7 +88,9 @@ suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> [test_basic, test_cmp, test_range, test_spread, - test_phash2, otp_5292, bit_level_binaries, otp_7127]. + test_phash2, otp_5292, bit_level_binaries, otp_7127, + test_hash_zero + ]. groups() -> []. @@ -152,7 +155,7 @@ otp_5292(Config) when is_list(Config) -> %% Test hashing bit-level binaries. bit_level_binaries(Config) when is_list(Config) -> - bit_level_binaries(). + bit_level_binaries_do(). otp_7127(suite) -> []; @@ -161,6 +164,8 @@ otp_7127(doc) -> otp_7127(Config) when is_list(Config) -> otp_7127_test(). +test_hash_zero(Config) when is_list(Config) -> + hash_zero_test(). -endif. @@ -537,7 +542,7 @@ 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 +597,26 @@ 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 %% |