%%
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%%
%% Copyright Ericsson AB 2001-2009. All Rights Reserved.
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%% 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
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%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
%% the License for the specific language governing rights and limitations
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%%
-module(andor_SUITE).
-export([all/1,
t_case/1,t_and_or/1,t_andalso/1,t_orelse/1,inside/1,overlap/1,
combined/1,in_case/1,before_and_inside_if/1]).
-include("test_server.hrl").
all(suite) ->
test_lib:recompile(?MODULE),
[t_case,t_and_or,t_andalso,t_orelse,inside,overlap,combined,in_case,
before_and_inside_if].
t_case(Config) when is_list(Config) ->
%% We test boolean cases almost but not quite like cases
%% generated by andalso/orelse.
?line less = t_case_a(1, 2),
?line not_less = t_case_a(2, 2),
?line {'EXIT',{{case_clause,false},_}} = (catch t_case_b({x,y,z}, 2)),
?line {'EXIT',{{case_clause,true},_}} = (catch t_case_b(a, a)),
?line eq = t_case_c(a, a),
?line ne = t_case_c(42, []),
?line t = t_case_d(x, x, true),
?line f = t_case_d(x, x, false),
?line f = t_case_d(x, y, true),
?line {'EXIT',{badarg,_}} = (catch t_case_d(x, y, blurf)),
?line true = (catch t_case_e({a,b}, {a,b})),
?line false = (catch t_case_e({a,b}, 42)),
?line true = t_case_xy(42, 100, 700),
?line true = t_case_xy(42, 100, whatever),
?line false = t_case_xy(42, wrong, 700),
?line false = t_case_xy(42, wrong, whatever),
?line true = t_case_xy(0, whatever, 700),
?line true = t_case_xy(0, 100, 700),
?line false = t_case_xy(0, whatever, wrong),
?line false = t_case_xy(0, 100, wrong),
ok.
t_case_a(A, B) ->
case A < B of
[_|_] -> ok;
true -> less;
false -> not_less;
{a,b,c} -> ok;
_Var -> ok
end.
t_case_b(A, B) ->
case A =:= B of
blurf -> ok
end.
t_case_c(A, B) ->
case not(A =:= B) of
true -> ne;
false -> eq
end.
t_case_d(A, B, X) ->
case (A =:= B) and X of
true -> t;
false -> f
end.
t_case_e(A, B) ->
case A =:= B of
Bool when is_tuple(A) -> id(Bool)
end.
t_case_xy(X, Y, Z) ->
Res = t_case_x(X, Y, Z),
Res = t_case_y(X, Y, Z).
t_case_x(X, Y, Z) ->
case abs(X) =:= 42 of
true ->
Y =:= 100;
false ->
Z =:= 700
end.
t_case_y(X, Y, Z) ->
case abs(X) =:= 42 of
false ->
Z =:= 700;
true ->
Y =:= 100
end.
t_and_or(Config) when is_list(Config) ->
?line true = true and true,
?line false = true and false,
?line false = false and true,
?line false = false and false,
?line true = id(true) and true,
?line false = id(true) and false,
?line false = id(false) and true,
?line false = id(false) and false,
?line true = true and id(true),
?line false = true and id(false),
?line false = false and id(true),
?line false = false and id(false),
?line true = true or true,
?line true = true or false,
?line true = false or true,
?line false = false or false,
?line true = id(true) or true,
?line true = id(true) or false,
?line true = id(false) or true,
?line false = id(false) or false,
?line true = true or id(true),
?line true = true or id(false),
?line true = false or id(true),
?line false = false or id(false),
ok.
-define(GUARD(E), if E -> true;
true -> false
end).
t_andalso(Config) when is_list(Config) ->
Bs = [true,false],
Ps = [{X,Y} || X <- Bs, Y <- Bs],
lists:foreach(fun (P) -> t_andalso_1(P) end, Ps),
?line true = true andalso true,
?line false = true andalso false,
?line false = false andalso true,
?line false = false andalso false,
?line true = ?GUARD(true andalso true),
?line false = ?GUARD(true andalso false),
?line false = ?GUARD(false andalso true),
?line false = ?GUARD(false andalso false),
?line false = false andalso glurf,
?line false = false andalso exit(exit_now),
?line true = not id(false) andalso not id(false),
?line false = not id(false) andalso not id(true),
?line false = not id(true) andalso not id(false),
?line false = not id(true) andalso not id(true),
?line {'EXIT',{badarg,_}} = (catch not id(glurf) andalso id(true)),
?line {'EXIT',{badarg,_}} = (catch not id(false) andalso not id(glurf)),
?line false = id(false) andalso not id(glurf),
?line false = false andalso not id(glurf),
ok.
t_orelse(Config) when is_list(Config) ->
Bs = [true,false],
Ps = [{X,Y} || X <- Bs, Y <- Bs],
lists:foreach(fun (P) -> t_orelse_1(P) end, Ps),
?line true = true orelse true,
?line true = true orelse false,
?line true = false orelse true,
?line false = false orelse false,
?line true = ?GUARD(true orelse true),
?line true = ?GUARD(true orelse false),
?line true = ?GUARD(false orelse true),
?line false = ?GUARD(false orelse false),
?line true = true orelse glurf,
?line true = true orelse exit(exit_now),
?line true = not id(false) orelse not id(false),
?line true = not id(false) orelse not id(true),
?line true = not id(true) orelse not id(false),
?line false = not id(true) orelse not id(true),
?line {'EXIT',{badarg,_}} = (catch not id(glurf) orelse id(true)),
?line {'EXIT',{badarg,_}} = (catch not id(true) orelse not id(glurf)),
?line true = id(true) orelse not id(glurf),
?line true = true orelse not id(glurf),
ok.
t_andalso_1({X,Y}) ->
io:fwrite("~w andalso ~w: ",[X,Y]),
V1 = echo(X) andalso echo(Y),
V1 = if
X andalso Y -> true;
true -> false
end,
check(V1, X and Y).
t_orelse_1({X,Y}) ->
io:fwrite("~w orelse ~w: ",[X,Y]),
V1 = echo(X) orelse echo(Y),
V1 = if
X orelse Y -> true;
true -> false
end,
check(V1, X or Y).
inside(Config) when is_list(Config) ->
?line true = inside(-8, 1),
?line false = inside(-53.5, -879798),
?line false = inside(1.0, -879),
?line false = inside(59, -879),
?line false = inside(-11, 1.0),
?line false = inside(100, 0.2),
?line false = inside(100, 1.2),
?line false = inside(-53.5, 4),
?line false = inside(1.0, 5.3),
?line false = inside(59, 879),
ok.
inside(Xm, Ym) ->
X = -10.0,
Y = -2.0,
W = 20.0,
H = 4.0,
Res = inside(Xm, Ym, X, Y, W, H),
Res = if
X =< Xm andalso Xm < X+W andalso Y =< Ym andalso Ym < Y+H -> true;
true -> false
end,
case not id(Res) of
Outside ->
Outside = if
not(X =< Xm andalso Xm < X+W andalso Y =< Ym andalso Ym < Y+H) -> true;
true -> false
end
end,
{Res,Xm,Ym,X,Y,W,H} = inside_guard(Xm, Ym, X, Y, W, H),
io:format("~p =< ~p andalso ~p < ~p andalso ~p =< ~p andalso ~p < ~p ==> ~p",
[X,Xm,Xm,X+W,Y,Ym,Ym,Y+H,Res]),
Res.
inside(Xm, Ym, X, Y, W, H) ->
X =< Xm andalso Xm < X+W andalso Y =< Ym andalso Ym < Y+H.
inside_guard(Xm, Ym, X, Y, W, H) when X =< Xm andalso Xm < X+W
andalso Y =< Ym andalso Ym < Y+H ->
{true,Xm,Ym,X,Y,W,H};
inside_guard(Xm, Ym, X, Y, W, H) ->
{false,Xm,Ym,X,Y,W,H}.
overlap(Config) when is_list(Config) ->
?line true = overlap(7.0, 2.0, 8.0, 0.5),
?line true = overlap(7.0, 2.0, 8.0, 2.5),
?line true = overlap(7.0, 2.0, 5.3, 2),
?line true = overlap(7.0, 2.0, 0.0, 100.0),
?line false = overlap(-1, 2, -35, 0.5),
?line false = overlap(-1, 2, 777, 0.5),
?line false = overlap(-1, 2, 2, 10),
?line false = overlap(2, 10, 12, 55.3),
ok.
overlap(Pos1, Len1, Pos2, Len2) ->
Res = case Pos1 of
Pos1 when (Pos2 =< Pos1 andalso Pos1 < Pos2+Len2)
orelse (Pos1 =< Pos2 andalso Pos2 < Pos1+Len1) ->
true;
Pos1 -> false
end,
Res = (Pos2 =< Pos1 andalso Pos1 < Pos2+Len2)
orelse (Pos1 =< Pos2 andalso Pos2 < Pos1+Len1),
Res = case Pos1 of
Pos1 when (Pos2 =< Pos1 andalso Pos1 < Pos2+Len2)
orelse (Pos1 =< Pos2 andalso Pos2 < Pos1+Len1) ->
true;
Pos1 -> false
end,
id(Res).
-define(COMB(A,B,C), (A andalso B orelse C)).
combined(Config) when is_list(Config) ->
?line false = comb(false, false, false),
?line true = comb(false, false, true),
?line false = comb(false, true, false),
?line true = comb(false, true, true),
?line false = comb(true, false, false),
?line true = comb(true, true, false),
?line true = comb(true, false, true),
?line true = comb(true, true, true),
?line false = comb(false, blurf, false),
?line true = comb(false, blurf, true),
?line true = comb(true, true, blurf),
?line false = ?COMB(false, false, false),
?line true = ?COMB(false, false, true),
?line false = ?COMB(false, true, false),
?line true = ?COMB(false, true, true),
?line false = ?COMB(true, false, false),
?line true = ?COMB(true, true, false),
?line true = ?COMB(true, false, true),
?line true = ?COMB(true, true, true),
?line false = ?COMB(false, blurf, false),
?line true = ?COMB(false, blurf, true),
?line true = ?COMB(true, true, blurf),
ok.
-undef(COMB).
comb(A, B, C) ->
Res = A andalso B orelse C,
Res = if
A andalso B orelse C -> true;
true -> false
end,
NotRes = if
not(A andalso B orelse C) -> true;
true -> false
end,
NotRes = id(not Res),
Res = A andalso B orelse C,
Res = if
A andalso B orelse C -> true;
true -> false
end,
NotRes = id(not Res),
Res = if
A andalso B orelse C -> true;
true -> false
end,
id(Res).
%% Test that a boolean expression in a case expression is properly
%% optimized (in particular, that the error behaviour is correct).
in_case(Config) when is_list(Config) ->
?line edge_rings = in_case_1(1, 1, 1, 1, 1),
?line not_loop = in_case_1(0.5, 1, 1, 1, 1),
?line loop = in_case_1(0.5, 0.9, 1.1, 1, 4),
?line {'EXIT',{badarith,_}} = (catch in_case_1(1, 1, 1, 1, 0)),
?line {'EXIT',{badarith,_}} = (catch in_case_1(1, 1, 1, 1, nan)),
?line {'EXIT',{badarg,_}} = (catch in_case_1(1, 1, 1, blurf, 1)),
?line {'EXIT',{badarith,_}} = (catch in_case_1([nan], 1, 1, 1, 1)),
ok.
in_case_1(LenUp, LenDw, LenN, Rotation, Count) ->
Res = in_case_1_body(LenUp, LenDw, LenN, Rotation, Count),
Res = in_case_1_guard(LenUp, LenDw, LenN, Rotation, Count),
Res.
in_case_1_body(LenUp, LenDw, LenN, Rotation, Count) ->
case (LenUp/Count > 0.707) and (LenN/Count > 0.707) and
(abs(Rotation) > 0.707) of
true ->
edge_rings;
false ->
case (LenUp >= 1) or (LenDw >= 1) or
(LenN =< 1) or (Count < 4) of
true ->
not_loop;
false ->
loop
end
end.
in_case_1_guard(LenUp, LenDw, LenN, Rotation, Count) ->
case (LenUp/Count > 0.707) andalso (LenN/Count > 0.707) andalso
(abs(Rotation) > 0.707) of
true -> edge_rings;
false when LenUp >= 1 orelse LenDw >= 1 orelse
LenN =< 1 orelse Count < 4 -> not_loop;
false -> loop
end.
before_and_inside_if(Config) when is_list(Config) ->
?line no = before_and_inside_if([a], [b], delete),
?line no = before_and_inside_if([a], [b], x),
?line no = before_and_inside_if([a], [], delete),
?line no = before_and_inside_if([a], [], x),
?line no = before_and_inside_if([], [], delete),
?line yes = before_and_inside_if([], [], x),
?line yes = before_and_inside_if([], [b], delete),
?line yes = before_and_inside_if([], [b], x),
?line {ch1,ch2} = before_and_inside_if_2([a], [b], blah),
?line {ch1,ch2} = before_and_inside_if_2([a], [b], xx),
?line {ch1,ch2} = before_and_inside_if_2([a], [], blah),
?line {ch1,ch2} = before_and_inside_if_2([a], [], xx),
?line {no,no} = before_and_inside_if_2([], [b], blah),
?line {no,no} = before_and_inside_if_2([], [b], xx),
?line {ch1,no} = before_and_inside_if_2([], [], blah),
?line {no,ch2} = before_and_inside_if_2([], [], xx),
ok.
%% Thanks to Simon Cornish and Kostis Sagonas.
%% Used to crash beam_bool.
before_and_inside_if(XDo1, XDo2, Do3) ->
Do1 = (XDo1 =/= []),
Do2 = (XDo2 =/= []),
if
%% This expression occurs in a try/catch (protected)
%% block, which cannot refer to variables outside of
%% the block that are boolean expressions.
Do1 =:= true;
Do1 =:= false, Do2 =:= false, Do3 =:= delete ->
no;
true ->
yes
end.
%% Thanks to Simon Cornish.
%% Used to generate code that would not set {y,0} on
%% all paths before its use (and therefore fail
%% validation by the beam_validator).
before_and_inside_if_2(XDo1, XDo2, Do3) ->
Do1 = (XDo1 =/= []),
Do2 = (XDo2 =/= []),
CH1 = if Do1 == true;
Do1 == false,Do2==false,Do3 == blah ->
ch1;
true ->
no
end,
CH2 = if Do1 == true;
Do1 == false,Do2==false,Do3 == xx ->
ch2;
true ->
no
end,
{CH1,CH2}.
%% Utilities.
check(V1, V0) ->
if V1 /= V0 ->
io:fwrite("error: ~w.\n", [V1]),
?t:fail();
true ->
io:fwrite("ok: ~w.\n", [V1])
end.
echo(X) ->
io:fwrite("eval(~w); ",[X]),
X.
id(I) -> I.
