1%% 2%% %CopyrightBegin% 3%% 4%% Copyright Ericsson AB 1999-2016. 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, 25 aligned/1,unaligned/1,zero_tail/1]). 26 27-include_lib("common_test/include/ct.hrl"). 28 29suite() -> [{ct_hooks,[ts_install_cth]}]. 30 31all() -> 32 [aligned, unaligned, zero_tail]. 33 34 35%% Test aligned tails. 36aligned(Config) when is_list(Config) -> 37 Tail1 = mkbin([]), 38 {258,Tail1} = al_get_tail_used(mkbin([1,2])), 39 Tail2 = mkbin(lists:seq(1, 127)), 40 {35091,Tail2} = al_get_tail_used(mkbin([137,19|Tail2])), 41 42 64896 = al_get_tail_unused(mkbin([253,128])), 43 64895 = al_get_tail_unused(mkbin([253,127|lists:seq(42, 255)])), 44 45 Tail3 = mkbin(lists:seq(0, 19)), 46 {0,Tail1} = get_dyn_tail_used(Tail1, 0), 47 {0,Tail3} = get_dyn_tail_used(mkbin([Tail3]), 0), 48 {73,Tail3} = get_dyn_tail_used(mkbin([73|Tail3]), 8), 49 50 0 = get_dyn_tail_unused(mkbin([]), 0), 51 233 = get_dyn_tail_unused(mkbin([233]), 8), 52 23 = get_dyn_tail_unused(mkbin([23,22,2]), 8), 53 ok. 54 55al_get_tail_used(<<A:16,T/binary>>) -> {A,T}. 56al_get_tail_unused(<<A:16,_/binary>>) -> A. 57 58%% Test that an non-aligned tail cannot be matched out. 59unaligned(Config) when is_list(Config) -> 60 {'EXIT',{function_clause,_}} = (catch get_tail_used(mkbin([42]))), 61 {'EXIT',{{badmatch,_},_}} = (catch get_dyn_tail_used(mkbin([137]), 3)), 62 {'EXIT',{function_clause,_}} = (catch get_tail_unused(mkbin([42,33]))), 63 {'EXIT',{{badmatch,_},_}} = (catch get_dyn_tail_unused(mkbin([44]), 7)), 64 ok. 65 66get_tail_used(<<A:1,T/binary>>) -> {A,T}. 67 68get_tail_unused(<<A:15,_/binary>>) -> A. 69 70get_dyn_tail_used(Bin, Sz) -> 71 <<A:Sz,T/binary>> = Bin, 72 {A,T}. 73 74get_dyn_tail_unused(Bin, Sz) -> 75 <<A:Sz,_/binary>> = Bin, 76 A. 77 78%% Test that zero tails are tested correctly. 79zero_tail(Config) when is_list(Config) -> 80 7 = (catch test_zero_tail(mkbin([7]))), 81 {'EXIT',{function_clause,_}} = (catch test_zero_tail(mkbin([1,2]))), 82 {'EXIT',{function_clause,_}} = (catch test_zero_tail2(mkbin([1,2,3]))), 83 ok. 84 85test_zero_tail(<<A:8>>) -> A. 86 87test_zero_tail2(<<_A:4,_B:4>>) -> ok. 88 89mkbin(L) when is_list(L) -> list_to_binary(L). 90