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%  Copyright 1998-2021 Paulo Moura <pmoura@logtalk.org>
%  SPDX-License-Identifier: Apache-2.0
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:- object(tests,
	extends(lgtunit)).

	:- info([
		version is 1:2:0,
		author is 'Paulo Moura',
		date is 2020-11-04,
		comment is 'Unit tests for the ISO Prolog standard (\\/)/1 built-in function.'
	]).

	% tests from the ISO/IEC 13211-1:1995(E) standard, section 9.4.4.4

	test(iso_bitwise_or_2_01, true(X == 14)) :-
		{X is '\\/'(10, 12)}.

	test(iso_bitwise_or_2_02, true(X == 14)) :-
		{X is \/(10, 12)}.

	test(iso_bitwise_or_2_03, true(X == 255)) :-
		{X is '\\/'(125, 255)}.

	- test(iso_bitwise_or_2_04, true(X == -2), [note('Implementation defined result')]) :-
		% assumes two's complement representation for negative integers
		{X is '\\/'(-10, 12)}.

	test(iso_bitwise_or_2_05, error(instantiation_error)) :-
		% try to delay the error to runtime
		variable(N),
		{_X is '\\/'(77, N)}.

	test(iso_bitwise_or_2_06, error(type_error(evaluable,foo/0))) :-
		% example fixed in ISO/IEC 13211-1:1995/Cor.1:2007
		% try to delay the error to runtime
		foo(0, Foo),
		{_X is '\\/'(Foo, 2)}.

	% tests from the Prolog ISO conformance testing framework written by Péter Szabó and Péter Szeredi

	test(sics_bitwise_or_2_07, error(type_error(integer,10.0))) :-
		{_X is '\\/'(10.0, 12)}.

	% tests from the Logtalk portability work

	test(lgt_bitwise_or_2_08, error(type_error(integer,12.0))) :-
		{_X is '\\/'(10, 12.0)}.

	test(lgt_bitwise_or_1_09, error(instantiation_error)) :-
		% try to delay the error to runtime
		variable(N),
		{_X is '\\/'(N, 12)}.

	test(lgt_bitwise_or_2_10, error(type_error(evaluable,foo/0))) :-
		% try to delay the error to runtime
		foo(0, Foo),
		{_X is '\\/'(10, Foo)}.

	test(lgt_bitwise_or_2_11, error(type_error(evaluable,foo/1))) :-
		% try to delay the error to runtime
		foo(1, Foo),
		{_X is '\\/'(Foo, 12)}.

	test(lgt_bitwise_or_2_12, error(type_error(evaluable,foo/1))) :-
		% try to delay the error to runtime
		foo(1, Foo),
		{_X is '\\/'(10, Foo)}.

	test(lgt_bitwise_or_2_13, error(type_error(evaluable,foo/2))) :-
		% try to delay the error to runtime
		foo(2, Foo),
		{_X is '\\/'(Foo, 12)}.

	test(lgt_bitwise_or_2_14, error(type_error(evaluable,foo/2))) :-
		% try to delay the error to runtime
		foo(2, Foo),
		{_X is '\\/'(10, Foo)}.

	% auxiliary predicates used to delay errors to runtime

	variable(_).

	foo(0, foo).
	foo(1, foo(1)).
	foo(2, foo(1,2)).

:- end_object.
