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

	:- info([
		version is 1:1:0,
		author is 'Paulo Moura',
		date is 2018-02-12,
		comment is 'Unit tests for the ISO Prolog standard acyclic_term/1 built-in predicate.'
	]).

	% tests from the ISO/IEC 13211-1:1995/Cor.2:2012(en) standard, section 8.3.11.4

	succeeds(iso_acyclic_term_1_01) :-
		{acyclic_term(a(1, _))}.

	:- if((
		current_logtalk_flag(coinduction, supported),
		\+ current_logtalk_flag(prolog_dialect, cx),
		\+ current_logtalk_flag(prolog_dialect, eclipse)
	)).
		fails(iso_acyclic_term_1_02) :-
			{X = f(X), acyclic_term(X)}.

		fails(lgt_acyclic_term_1_03) :-
			{X = [_| X], acyclic_term(X)}.
	:- else.
		- fails(iso_acyclic_term_1_02) :-
			% STO; Undefined
			{X = f(X), acyclic_term(X)}.

		- fails(lgt_acyclic_term_1_03) :-
			% STO; Undefined
			{X = [_| X], acyclic_term(X)}.
	:- endif.

:- end_object.
