1%% 2%% %CopyrightBegin% 3%% 4%% Copyright Ericsson AB 2000-2016. All Rights Reserved. 5%% 6%% Licensed under the Apache License, Version 2.0 (the "License"); 7%% you may not use this file except in compliance with the License. 8%% You may obtain a copy of the License at 9%% 10%% http://www.apache.org/licenses/LICENSE-2.0 11%% 12%% Unless required by applicable law or agreed to in writing, software 13%% distributed under the License is distributed on an "AS IS" BASIS, 14%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 15%% See the License for the specific language governing permissions and 16%% limitations under the License. 17%% 18%% %CopyrightEnd% 19%% 20 21-module(bs_match_tail_SUITE). 22 23-author('bjorn@erix.ericsson.se'). 24-export([all/0, suite/0,groups/0,init_per_group/2,end_per_group/2, 25 init_per_testcase/2,end_per_testcase/2, 26 init_per_suite/1,end_per_suite/1, 27 aligned/1,unaligned/1,zero_tail/1]). 28 29-include_lib("common_test/include/ct.hrl"). 30 31suite() -> 32 [{ct_hooks,[ts_install_cth]}, 33 {timetrap,{minutes,1}}]. 34 35all() -> 36 cases(). 37 38groups() -> 39 []. 40 41init_per_group(_GroupName, Config) -> 42 Config. 43 44end_per_group(_GroupName, Config) -> 45 Config. 46 47 48cases() -> 49 [aligned, unaligned, zero_tail]. 50 51init_per_testcase(_Case, Config) -> 52 test_lib:interpret(?MODULE), 53 Config. 54 55end_per_testcase(_Case, _Config) -> 56 ok. 57 58init_per_suite(Config) when is_list(Config) -> 59 test_lib:interpret(?MODULE), 60 true = lists:member(?MODULE, int:interpreted()), 61 Config. 62 63end_per_suite(Config) when is_list(Config) -> 64 ok. 65 66%% Test aligned tails. 67aligned(Config) when is_list(Config) -> 68 Tail1 = mkbin([]), 69 {258,Tail1} = al_get_tail_used(mkbin([1,2])), 70 Tail2 = mkbin(lists:seq(1, 127)), 71 {35091,Tail2} = al_get_tail_used(mkbin([137,19|Tail2])), 72 73 64896 = al_get_tail_unused(mkbin([253,128])), 74 64895 = al_get_tail_unused(mkbin([253,127|lists:seq(42, 255)])), 75 76 Tail3 = mkbin(lists:seq(0, 19)), 77 {0,Tail1} = get_dyn_tail_used(Tail1, 0), 78 {0,Tail3} = get_dyn_tail_used(mkbin([Tail3]), 0), 79 {73,Tail3} = get_dyn_tail_used(mkbin([73|Tail3]), 8), 80 81 0 = get_dyn_tail_unused(mkbin([]), 0), 82 233 = get_dyn_tail_unused(mkbin([233]), 8), 83 23 = get_dyn_tail_unused(mkbin([23,22,2]), 8), 84 ok. 85 86al_get_tail_used(<<A:16,T/binary>>) -> {A,T}. 87al_get_tail_unused(<<A:16,_/binary>>) -> A. 88 89%% Test that an non-aligned tail cannot be matched out. 90unaligned(Config) when is_list(Config) -> 91 {'EXIT',{function_clause,_}} = (catch get_tail_used(mkbin([42]))), 92 {'EXIT',{{badmatch,_},_}} = (catch get_dyn_tail_used(mkbin([137]), 3)), 93 {'EXIT',{function_clause,_}} = (catch get_tail_unused(mkbin([42,33]))), 94 {'EXIT',{{badmatch,_},_}} = (catch get_dyn_tail_unused(mkbin([44]), 7)), 95 ok. 96 97get_tail_used(<<A:1,T/binary>>) -> {A,T}. 98 99get_tail_unused(<<A:15,_/binary>>) -> A. 100 101get_dyn_tail_used(Bin, Sz) -> 102 <<A:Sz,T/binary>> = Bin, 103 {A,T}. 104 105get_dyn_tail_unused(Bin, Sz) -> 106 <<A:Sz,_/binary>> = Bin, 107 A. 108 109%% Test that zero tails are tested correctly. 110zero_tail(Config) when is_list(Config) -> 111 7 = (catch test_zero_tail(mkbin([7]))), 112 {'EXIT',{function_clause,_}} = (catch test_zero_tail(mkbin([1,2]))), 113 {'EXIT',{function_clause,_}} = (catch test_zero_tail2(mkbin([1,2,3]))), 114 ok. 115 116test_zero_tail(<<A:8>>) -> A. 117 118test_zero_tail2(<<_A:4,_B:4>>) -> ok. 119 120mkbin(L) when is_list(L) -> list_to_binary(L). 121