Examples with Alpha at.ac.tuwien.kr.alpha.api.Alpha used on opensource projects

Example 26 with Alpha

use of at.ac.tuwien.kr.alpha.api.Alpha in project Alpha by alpha-asp.

the class AlphaImplTest method withExternalSubtype.

@Test
public void withExternalSubtype() throws Exception {
    SubThingy thingy = new SubThingy();
    BasicRule rule = new BasicRule(Heads.newNormalHead(Atoms.newBasicAtom(Predicates.getPredicate("p", 1), Terms.newConstant("x"))), singletonList(Literals.fromAtom(Atoms.newExternalAtom(Predicates.getPredicate("thinger", 1), new MethodPredicateInterpretation(this.getClass().getMethod("thinger", Thingy.class)), singletonList(Terms.newConstant(thingy)), emptyList()), true)));
    Alpha system = new AlphaImpl();
    InputProgram prog = new InputProgram(singletonList(rule), emptyList(), new InlineDirectivesImpl());
    Set<AnswerSet> actual = system.solve(prog).collect(Collectors.toSet());
    Set<AnswerSet> expected = new HashSet<>(singletonList(new AnswerSetBuilder().predicate("p").instance("x").build()));
    assertEquals(expected, actual);
}

Example 27 with Alpha

use of at.ac.tuwien.kr.alpha.api.Alpha in project Alpha by alpha-asp.

the class AlphaImplTest method smallGraphCoolNode.

@Test
public void smallGraphCoolNode() throws Exception {
    Alpha system = new AlphaImpl();
    InputConfig cfg = InputConfig.forString("node(1..2). in(X) :- node(X), &coolNode[X].");
    cfg.addPredicateMethod("coolNode", Externals.processPredicateMethod(this.getClass().getMethod("coolNode", int.class)));
    ASPCore2Program prog = system.readProgram(cfg);
    Set<AnswerSet> actual = system.solve(prog).collect(Collectors.toSet());
    Set<AnswerSet> expected = AnswerSetsParser.parse("{ in(1), node(1), node(2) }");
    assertEquals(expected, actual);
}

Example 28 with Alpha

use of at.ac.tuwien.kr.alpha.api.Alpha in project Alpha by alpha-asp.

the class AlphaImplTest method noInput.

@Test
public void noInput() throws Exception {
    Alpha system = new AlphaImpl();
    InputConfig cfg = InputConfig.forString("node(1). a :- &bestNode(X), node(X).");
    cfg.addPredicateMethod("bestNode", Externals.processPredicateMethod(this.getClass().getMethod("bestNode")));
    ASPCore2Program prog = system.readProgram(cfg);
    Set<AnswerSet> expected = AnswerSetsParser.parse("{ node(1), a }");
    Set<AnswerSet> actual = system.solve(prog).collect(Collectors.toSet());
    assertEquals(expected, actual);
}

Example 29 with Alpha

use of at.ac.tuwien.kr.alpha.api.Alpha in project Alpha by alpha-asp.

the class AlphaImplTest method smallGraphNoNeighbors.

@Test
@Disabled("Test program is not safe (external lacking output variables). This should throw some exception.")
public void smallGraphNoNeighbors() throws Exception {
    Alpha system = new AlphaImpl();
    InputConfig cfg = InputConfig.forString("noNeighbors(2) :- not &neighbors[2].");
    cfg.addPredicateMethod("neighbors", Externals.processPredicateMethod(this.getClass().getMethod("neighbors", int.class)));
    ASPCore2Program prog = system.readProgram(cfg);
    Set<AnswerSet> expected = AnswerSetsParser.parse("{ noNeighbors(2) }");
    Set<AnswerSet> actual = system.solve(prog).collect(Collectors.toSet());
    assertEquals(expected, actual);
}

Example 30 with Alpha

use of at.ac.tuwien.kr.alpha.api.Alpha in project Alpha by alpha-asp.

the class AlphaImplTest method withNegatedExternal.

@Test
@SuppressWarnings("unchecked")
public void withNegatedExternal() throws IOException {
    Alpha alpha = new AlphaImpl();
    ASPCore2Program prog = alpha.readProgram(InputConfig.forString(NEGATED_EXTERNAL_ASP));
    Set<AnswerSet> answerSets = alpha.solve(prog).collect(Collectors.toSet());
    assertEquals(31, answerSets.size());
    // Verify every result string has length 6 and contains "foo"
    for (AnswerSet as : answerSets) {
        for (Atom atom : as.getPredicateInstances(Predicates.getPredicate("resultstring", 1))) {
            String resultstring = ((ConstantTerm<String>) atom.getTerms().get(0)).getObject();
            LOGGER.debug("ResultString is {}", resultstring);
            assertEquals(6, resultstring.length());
            assertTrue(resultstring.contains("foo"));
        }
    }
}