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

Example 1 with Alpha

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

the class AlphaImplTest method smallGraph.

@Test
public void smallGraph() throws Exception {
    Alpha system = new AlphaImpl();
    InputConfig inputCfg = InputConfig.forString("node(1). node(2). node(3). a :- &connected[1,2].");
    inputCfg.addPredicateMethod("connected", Externals.processPredicate((Integer a, Integer b) -> (a == 1 && b == 2) || (b == 2 || b == 3)));
    ASPCore2Program program = system.readProgram(inputCfg);
    Set<AnswerSet> actual = system.solve(program).collect(Collectors.toSet());
    Set<AnswerSet> expected = AnswerSetsParser.parse("{ a, node(1), node(2), node(3) }");
    assertEquals(expected, actual);
}

Example 2 with Alpha

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

the class AlphaImplTest method programWithExternalStringStuff.

@Test
@SuppressWarnings("unchecked")
public void programWithExternalStringStuff() throws IOException {
    Alpha alpha = new AlphaImpl();
    ASPCore2Program prog = alpha.readProgram(InputConfig.forString(STRINGSTUFF_ASP));
    Set<AnswerSet> answerSets = alpha.solve(prog).collect(Collectors.toSet());
    // 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();
            assertEquals(6, resultstring.length());
            assertTrue(resultstring.contains("foo"));
        }
    }
}

Example 3 with Alpha

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

the class AlphaImplTest method withExternalViaAnnotation.

@Test
public void withExternalViaAnnotation() throws Exception {
    Alpha system = new AlphaImpl();
    InputConfig cfg = InputConfig.forString("a :- &isOne[1].");
    cfg.addPredicateMethods(Externals.scan(this.getClass()));
    ASPCore2Program prog = system.readProgram(cfg);
    Set<AnswerSet> actual = system.solve(prog).collect(Collectors.toSet());
    Set<AnswerSet> expected = new HashSet<>(singletonList(new AnswerSetBuilder().predicate("a").build()));
    assertEquals(expected, actual);
}

Example 4 with Alpha

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

the class AlphaImplTest method smallGraphSingleNeighbor.

@Test
public void smallGraphSingleNeighbor() throws Exception {
    Alpha system = new AlphaImpl();
    InputConfig cfg = InputConfig.forString("node(1..3). in(1,X) :- &neighbors[1](X), node(X).");
    cfg.addPredicateMethod("neighbors", Externals.processPredicateMethod(this.getClass().getMethod("neighbors", int.class)));
    ASPCore2Program prog = system.readProgram(cfg);
    Set<AnswerSet> expected = AnswerSetsParser.parse("{ in(1,2), in(1,3), node(1), node(2), node(3) }");
    Set<AnswerSet> actual = system.solve(prog).collect(Collectors.toSet());
    assertEquals(expected, actual);
}

Example 5 with Alpha

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

the class AlphaImplTest method withExternalTypeConflict.

@Test
public void withExternalTypeConflict() {
    assertThrows(IllegalArgumentException.class, () -> {
        Alpha system = new AlphaImpl();
        InputConfig inputCfg = InputConfig.forString("a :- &isFoo[\"adsfnfdsf\"].");
        inputCfg.addPredicateMethod("isFoo", Externals.processPredicateMethod(this.getClass().getMethod("isFoo", Integer.class)));
        Set<AnswerSet> actual = system.solve(system.readProgram(inputCfg)).collect(Collectors.toSet());
        Set<AnswerSet> expected = new HashSet<>(singletonList(new AnswerSetBuilder().predicate("a").build()));
        assertEquals(expected, actual);
    });
}