%%
%% %CopyrightBegin%
%%
%% Copyright Ericsson AB 1997-2011. 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%
%%
-module(guard_SUITE).
-export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1,
init_per_group/2,end_per_group/2, bad_arith/1, bad_tuple/1,
test_heap_guards/1, guard_bifs/1,
type_tests/1,guard_bif_binary_part/1]).
-include_lib("common_test/include/ct.hrl").
-export([init/3]).
-import(lists, [member/2]).
suite() -> [{ct_hooks,[ts_install_cth]}].
all() ->
[bad_arith, bad_tuple, test_heap_guards, guard_bifs,
type_tests, guard_bif_binary_part].
groups() ->
[].
init_per_suite(Config) ->
Config.
end_per_suite(_Config) ->
ok.
init_per_group(_GroupName, Config) ->
Config.
end_per_group(_GroupName, Config) ->
Config.
bad_arith(doc) -> "Test that a bad arithmetic operation in a guard works correctly.";
bad_arith(Config) when is_list(Config) ->
?line 5 = bad_arith1(2, 3),
?line 10 = bad_arith1(1, infinity),
?line 10 = bad_arith1(infinity, 1),
ok.
bad_arith1(T1, T2) when T1+T2 < 10 ->
T1+T2;
bad_arith1(_, _) ->
10.
bad_tuple(doc) -> "Test that bad arguments to element/2 are handled correctly.";
bad_tuple(Config) when is_list(Config) ->
?line error = bad_tuple1(a),
?line error = bad_tuple1({a, b}),
?line x = bad_tuple1({x, b}),
?line y = bad_tuple1({a, b, y}),
ok.
bad_tuple1(T) when element(1, T) == x ->
x;
bad_tuple1(T) when element(3, T) == y ->
y;
bad_tuple1(_) ->
error.
test_heap_guards(doc) -> "";
test_heap_guards(Config) when is_list(Config) ->
?line Dog = test_server:timetrap(test_server:minutes(2)),
?line process_flag(trap_exit, true),
?line Tuple = {a, tuple, is, built, here, xxx},
?line List = [a, list, is, built, here],
?line 'try'(fun a_case/1, [Tuple], [Tuple]),
?line 'try'(fun a_case/1, [List], [List, List]),
?line 'try'(fun a_case/1, [a], [a]),
?line 'try'(fun an_if/1, [Tuple], [Tuple]),
?line 'try'(fun an_if/1, [List], [List, List]),
?line 'try'(fun an_if/1, [a], [a]),
?line 'try'(fun receive_test/1, [Tuple], [Tuple]),
?line 'try'(fun receive_test/1, [List], [List, List]),
?line 'try'(fun receive_test/1, [a], [a]),
?line test_server:timetrap_cancel(Dog).
a_case(V) ->
case V of
T when T == {a, tuple, is, built, here, xxx} ->
[T];
L when L == [a, list, is, built, here] ->
[L, L];
a ->
[a]
end.
an_if(V) ->
if
V == {a, tuple, is, built, here, xxx} ->
[V];
V == [a, list, is, built, here] ->
[V, V];
V == a ->
[a]
end.
receive_test(V) ->
self() ! V,
a_receive().
a_receive() ->
receive
T when T == {a, tuple, is, built, here, xxx} ->
[T];
L when L == [a, list, is, built, here] ->
[L, L];
a ->
[a]
end.
'try'(Fun, Args, Result) ->
'try'(512, Fun, Args, Result, []).
'try'(0, _, _, _, _) ->
ok;
'try'(Iter, Fun, Args, Result, Filler) ->
Pid = spawn_link(?MODULE, init, [Fun,Args,list_to_tuple(Filler)]),
receive
{'EXIT', Pid, {result, Result}} ->
?line 'try'(Iter-1, Fun, Args, Result, [0|Filler]);
{result, Other} ->
?line io:format("Expected ~p; got ~p~n", [Result, Other]),
?line test_server:fail();
Other ->
?line test_server:fail({unexpected_message, Other})
end.
init(Fun, Args, Filler) ->
Result = {result,apply(Fun, Args)},
dummy(Filler),
exit(Result).
dummy(_) ->
ok.
-define(MASK_ERROR(EXPR),mask_error((catch (EXPR)))).
mask_error({'EXIT',{Err,_}}) ->
Err;
mask_error(Else) ->
Else.
guard_bif_binary_part(doc) ->
["Test the binary_part/2,3 guard BIF's extensively"];
guard_bif_binary_part(Config) when is_list(Config) ->
%% Overflow tests that need to be unoptimized
?line badarg =
?MASK_ERROR(
binary_part(<<1,2,3>>,{16#FFFFFFFFFFFFFFFF,
-16#7FFFFFFFFFFFFFFF-1})),
?line badarg =
?MASK_ERROR(
binary_part(<<1,2,3>>,{16#FFFFFFFFFFFFFFFF,
16#7FFFFFFFFFFFFFFF})),
F = fun(X) ->
Master = self(),
{Pid,Ref} = spawn_monitor( fun() ->
A = lists:duplicate(X,a),
B = [do_binary_part_guard() | A],
Master ! {self(),hd(B)},
ok
end),
receive
{Pid,ok} ->
erlang:demonitor(Ref,[flush]),
ok;
Error ->
Error
end
end,
[ ok = F(N) || N <- lists:seq(1,10000) ],
ok.
do_binary_part_guard() ->
?line 1 = bptest(<<1,2,3>>),
?line 2 = bptest(<<2,1,3>>),
?line error = bptest(<<1>>),
?line error = bptest(<<>>),
?line error = bptest(apa),
?line 3 = bptest(<<2,3,3>>),
% With one variable (pos)
?line 1 = bptest(<<1,2,3>>,1),
?line 2 = bptest(<<2,1,3>>,1),
?line error = bptest(<<1>>,1),
?line error = bptest(<<>>,1),
?line error = bptest(apa,1),
?line 3 = bptest(<<2,3,3>>,1),
% With one variable (length)
?line 1 = bptesty(<<1,2,3>>,1),
?line 2 = bptesty(<<2,1,3>>,1),
?line error = bptesty(<<1>>,1),
?line error = bptesty(<<>>,1),
?line error = bptesty(apa,1),
?line 3 = bptesty(<<2,3,3>>,2),
% With one variable (whole tuple)
?line 1 = bptestx(<<1,2,3>>,{1,1}),
?line 2 = bptestx(<<2,1,3>>,{1,1}),
?line error = bptestx(<<1>>,{1,1}),
?line error = bptestx(<<>>,{1,1}),
?line error = bptestx(apa,{1,1}),
?line 3 = bptestx(<<2,3,3>>,{1,2}),
% With two variables
?line 1 = bptest(<<1,2,3>>,1,1),
?line 2 = bptest(<<2,1,3>>,1,1),
?line error = bptest(<<1>>,1,1),
?line error = bptest(<<>>,1,1),
?line error = bptest(apa,1,1),
?line 3 = bptest(<<2,3,3>>,1,2),
% Direct (autoimported) call, these will be evaluated by the compiler...
?line <<2>> = binary_part(<<1,2,3>>,1,1),
?line <<1>> = binary_part(<<2,1,3>>,1,1),
% Compiler warnings due to constant evaluation expected (3)
?line badarg = ?MASK_ERROR(binary_part(<<1>>,1,1)),
?line badarg = ?MASK_ERROR(binary_part(<<>>,1,1)),
?line badarg = ?MASK_ERROR(binary_part(apa,1,1)),
?line <<3,3>> = binary_part(<<2,3,3>>,1,2),
% Direct call through apply
?line <<2>> = apply(erlang,binary_part,[<<1,2,3>>,1,1]),
?line <<1>> = apply(erlang,binary_part,[<<2,1,3>>,1,1]),
% Compiler warnings due to constant evaluation expected (3)
?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<1>>,1,1])),
?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[<<>>,1,1])),
?line badarg = ?MASK_ERROR(apply(erlang,binary_part,[apa,1,1])),
?line <<3,3>> = apply(erlang,binary_part,[<<2,3,3>>,1,2]),
% Constant propagation
?line Bin = <<1,2,3>>,
?line ok = if
binary_part(Bin,1,1) =:= <<2>> ->
ok;
%% Compiler warning, clause cannot match (expected)
true ->
error
end,
?line ok = if
binary_part(Bin,{1,1}) =:= <<2>> ->
ok;
%% Compiler warning, clause cannot match (expected)
true ->
error
end,
ok.
bptest(B) when length(B) =:= 1337 ->
1;
bptest(B) when binary_part(B,{1,1}) =:= <<2>> ->
1;
bptest(B) when erlang:binary_part(B,1,1) =:= <<1>> ->
2;
bptest(B) when erlang:binary_part(B,{1,2}) =:= <<3,3>> ->
3;
bptest(_) ->
error.
bptest(B,A) when length(B) =:= A ->
1;
bptest(B,A) when binary_part(B,{A,1}) =:= <<2>> ->
1;
bptest(B,A) when erlang:binary_part(B,A,1) =:= <<1>> ->
2;
bptest(B,A) when erlang:binary_part(B,{A,2}) =:= <<3,3>> ->
3;
bptest(_,_) ->
error.
bptestx(B,A) when length(B) =:= A ->
1;
bptestx(B,A) when binary_part(B,A) =:= <<2>> ->
1;
bptestx(B,A) when erlang:binary_part(B,A) =:= <<1>> ->
2;
bptestx(B,A) when erlang:binary_part(B,A) =:= <<3,3>> ->
3;
bptestx(_,_) ->
error.
bptesty(B,A) when length(B) =:= A ->
1;
bptesty(B,A) when binary_part(B,{1,A}) =:= <<2>> ->
1;
bptesty(B,A) when erlang:binary_part(B,1,A) =:= <<1>> ->
2;
bptesty(B,A) when erlang:binary_part(B,{1,A}) =:= <<3,3>> ->
3;
bptesty(_,_) ->
error.
bptest(B,A,_C) when length(B) =:= A ->
1;
bptest(B,A,C) when binary_part(B,{A,C}) =:= <<2>> ->
1;
bptest(B,A,C) when erlang:binary_part(B,A,C) =:= <<1>> ->
2;
bptest(B,A,C) when erlang:binary_part(B,{A,C}) =:= <<3,3>> ->
3;
bptest(_,_,_) ->
error.
guard_bifs(doc) -> "Test all guard bifs with nasty (but legal arguments).";
guard_bifs(Config) when is_list(Config) ->
?line Big = -237849247829874297658726487367328971246284736473821617265433,
?line Float = 387924.874,
%% Succeding use of guard bifs.
?line try_gbif('abs/1', Big, -Big),
?line try_gbif('float/1', Big, float(Big)),
?line try_gbif('float/1', Big, float(id(Big))),
?line try_gbif('trunc/1', Float, 387924.0),
?line try_gbif('round/1', Float, 387925.0),
?line try_gbif('length/1', [], 0),
?line try_gbif('length/1', [a], 1),
?line try_gbif('length/1', [a, b], 2),
?line try_gbif('length/1', lists:seq(0, 31), 32),
?line try_gbif('hd/1', [a], a),
?line try_gbif('hd/1', [a, b], a),
?line try_gbif('tl/1', [a], []),
?line try_gbif('tl/1', [a, b], [b]),
?line try_gbif('tl/1', [a, b, c], [b, c]),
?line try_gbif('size/1', {}, 0),
?line try_gbif('size/1', {a}, 1),
?line try_gbif('size/1', {a, b}, 2),
?line try_gbif('size/1', {a, b, c}, 3),
?line try_gbif('size/1', list_to_binary([]), 0),
?line try_gbif('size/1', list_to_binary([1]), 1),
?line try_gbif('size/1', list_to_binary([1, 2]), 2),
?line try_gbif('size/1', list_to_binary([1, 2, 3]), 3),
?line try_gbif('bit_size/1', <<0:7>>, 7),
?line try_gbif('element/2', {x}, {1, x}),
?line try_gbif('element/2', {x, y}, {1, x}),
?line try_gbif('element/2', {x, y}, {2, y}),
?line try_gbif('self/0', 0, self()),
?line try_gbif('node/0', 0, node()),
?line try_gbif('node/1', self(), node()),
%% Failing use of guard bifs.
?line try_fail_gbif('abs/1', Big, 1),
?line try_fail_gbif('abs/1', [], 1),
?line try_fail_gbif('float/1', Big, 42),
?line try_fail_gbif('float/1', [], 42),
?line try_fail_gbif('trunc/1', Float, 0.0),
?line try_fail_gbif('trunc/1', [], 0.0),
?line try_fail_gbif('round/1', Float, 1.0),
?line try_fail_gbif('round/1', [], a),
?line try_fail_gbif('length/1', [], 1),
?line try_fail_gbif('length/1', [a], 0),
?line try_fail_gbif('length/1', a, 0),
?line try_fail_gbif('length/1', {a}, 0),
?line try_fail_gbif('hd/1', [], 0),
?line try_fail_gbif('hd/1', [a], x),
?line try_fail_gbif('hd/1', x, x),
?line try_fail_gbif('tl/1', [], 0),
?line try_fail_gbif('tl/1', [a], x),
?line try_fail_gbif('tl/1', x, x),
?line try_fail_gbif('size/1', {}, 1),
?line try_fail_gbif('size/1', [], 0),
?line try_fail_gbif('size/1', [a], 1),
?line try_fail_gbif('size/1', fun() -> 1 end, 0),
?line try_fail_gbif('size/1', fun() -> 1 end, 1),
?line try_fail_gbif('element/2', {}, {1, x}),
?line try_fail_gbif('element/2', {x}, {1, y}),
?line try_fail_gbif('element/2', [], {1, z}),
?line try_fail_gbif('self/0', 0, list_to_pid("<0.0.0>")),
?line try_fail_gbif('node/0', 0, xxxx),
?line try_fail_gbif('node/1', self(), xxx),
?line try_fail_gbif('node/1', yyy, xxx),
ok.
try_gbif(Id, X, Y) ->
case guard_bif(Id, X, Y) of
{Id, X, Y} ->
io:format("guard_bif(~p, ~p, ~p) -- ok", [Id, X, Y]);
Other ->
?line ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
[Id, X, Y, Other]),
?line test_server:fail()
end.
try_fail_gbif(Id, X, Y) ->
case catch guard_bif(Id, X, Y) of
{'EXIT',{function_clause,[{?MODULE,guard_bif,[Id,X,Y],_}|_]}} ->
io:format("guard_bif(~p, ~p, ~p) -- ok", [Id,X,Y]);
Other ->
?line ok = io:format("guard_bif(~p, ~p, ~p) -- bad result: ~p\n",
[Id, X, Y, Other]),
?line test_server:fail()
end.
guard_bif('abs/1', X, Y) when abs(X) == Y ->
{'abs/1', X, Y};
guard_bif('float/1', X, Y) when float(X) == Y ->
{'float/1', X, Y};
guard_bif('trunc/1', X, Y) when trunc(X) == Y ->
{'trunc/1', X, Y};
guard_bif('round/1', X, Y) when round(X) == Y ->
{'round/1', X, Y};
guard_bif('length/1', X, Y) when length(X) == Y ->
{'length/1', X, Y};
guard_bif('hd/1', X, Y) when hd(X) == Y ->
{'hd/1', X, Y};
guard_bif('tl/1', X, Y) when tl(X) == Y ->
{'tl/1', X, Y};
guard_bif('size/1', X, Y) when size(X) == Y ->
{'size/1', X, Y};
guard_bif('bit_size/1', X, Y) when bit_size(X) == Y ->
{'bit_size/1', X, Y};
guard_bif('element/2', X, {Pos, Expected}) when element(Pos, X) == Expected ->
{'element/2', X, {Pos, Expected}};
guard_bif('self/0', X, Y) when self() == Y ->
{'self/0', X, Y};
guard_bif('node/0', X, Y) when node() == Y ->
{'node/0', X, Y};
guard_bif('node/1', X, Y) when node(X) == Y ->
{'node/1', X, Y}.
type_tests(doc) -> "Test the type tests.";
type_tests(Config) when is_list(Config) ->
?line Types = all_types(),
?line Tests = type_test_desc(),
?line put(errors, 0),
?line put(violations, 0),
?line type_tests(Tests, Types),
?line case {get(errors), get(violations)} of
{0, 0} ->
ok;
{0, N} ->
{comment, integer_to_list(N) ++ " standard violation(s)"};
{Errors, Violations} ->
io:format("~p sub test(s) failed, ~p violation(s)",
[Errors, Violations]),
?line test_server:fail()
end.
type_tests([{Test, AllowedTypes}| T], AllTypes) ->
type_tests(Test, AllTypes, AllowedTypes),
type_tests(T, AllTypes);
type_tests([], _) ->
ok.
type_tests(Test, [Type|T], Allowed) ->
{TypeTag, Value} = Type,
case member(TypeTag, Allowed) of
true ->
case catch type_test(Test, Value) of
Test ->
ok;
_Other ->
io:format("Test ~p(~p) failed", [Test, Value]),
put(errors, get(errors) + 1)
end;
false ->
case catch type_test(Test, Value) of
{'EXIT',{function_clause,
[{?MODULE,type_test,[Test,Value],Loc}|_]}}
when is_list(Loc) ->
ok;
{'EXIT',Other} ->
?line test_server:fail({unexpected_error_reason,Other});
tuple when is_function(Value) ->
io:format("Standard violation: Test ~p(~p) should fail",
[Test, Value]),
put(violations, get(violations) + 1);
_Other ->
io:format("Test ~p(~p) succeeded (should fail)", [Test, Value]),
put(errors, get(errors) + 1)
end
end,
type_tests(Test, T, Allowed);
type_tests(_, [], _) ->
ok.
all_types() ->
[{small, 42},
{big, 392742928742947293873938792874019287447829874290742},
{float, 3.14156},
{nil, []},
{cons, [a]},
{tuple, {a, b}},
{atom, xxxx},
{ref, make_ref()},
{pid, self()},
{port, open_port({spawn, efile}, [])},
{function, fun(_) -> "" end},
{function, fun erlang:abs/1},
{binary, list_to_binary([])},
{bitstring, <<0:7>>}].
type_test_desc() ->
[{binary, [binary]},
{bitstring, [binary, bitstring]},
{integer, [small, big]},
{float, [float]},
{number, [small, big, float]},
{atom, [atom]},
{list, [cons, nil]},
{nonempty_list, [cons]},
{nil, [nil]},
{tuple, [tuple]},
{pid, [pid]},
{port, [port]},
{reference, [ref]},
{function, [function]}].
type_test(integer, X) when is_integer(X) ->
integer;
type_test(float, X) when is_float(X) ->
float;
type_test(number, X) when is_number(X) ->
number;
type_test(atom, X) when is_atom(X) ->
atom;
type_test(list, X) when is_list(X) ->
list;
type_test(nonempty_list, [_]) ->
nonempty_list;
type_test(nil, []) ->
nil;
type_test(tuple, X) when is_tuple(X) ->
tuple;
type_test(pid, X) when is_pid(X) ->
pid;
type_test(reference, X) when is_reference(X) ->
reference;
type_test(port, X) when is_port(X) ->
port;
type_test(binary, X) when is_binary(X) ->
binary;
type_test(bitstring, X) when is_bitstring(X) ->
bitstring;
type_test(function, X) when is_function(X) ->
function.
id(I) -> I.
