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:- object(tests,
	extends(lgtunit)).

	:- info([
		version is 1:1:1,
		author is 'Paulo Moura',
		date is 2024-05-22,
		comment is 'Unit tests for the phrase//1 built-in method.'
	]).

	test(phrase_1_01, true) :-
		phrase(list(atom), [a,b,c]).

	test(phrase_1_02, true(Sum == 6)) :-
		phrase(list(sum(Sum)), [1,2,3]).

	% test DCG

	:- meta_non_terminal(list(0)).
	list(_) --> [].
	list(NonTerminal) --> phrase(NonTerminal), list(NonTerminal).

	atom --> [Element], {atom(Element)}.

	sum(Sum) --> [Sum], eos.
	sum(_), [Sum1] --> [Sum0, Element], {Sum1 is Sum0 + Element}.

:- end_object.
