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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.query.rewriter;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import tools.refinery.store.query.dnf.Query;
import tools.refinery.store.query.literal.AbstractCallLiteral;
import tools.refinery.store.query.literal.Reduction;
import tools.refinery.store.query.term.Variable;
import tools.refinery.store.query.view.AnySymbolView;
import tools.refinery.store.query.view.KeyOnlyView;
import tools.refinery.store.representation.Symbol;
import java.util.List;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;
import static org.hamcrest.Matchers.not;
import static tools.refinery.store.query.literal.Literals.not;
class DuplicateDnfRemoverTest {
private final static Symbol<Boolean> friend = Symbol.of("friend", 2);
private final static AnySymbolView friendView = new KeyOnlyView<>(friend);
private DuplicateDnfRemover sut;
@BeforeEach
void beforeEach() {
sut = new DuplicateDnfRemover();
}
@Test
void removeDuplicateSimpleTest() {
var one = Query.of("One", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var two = Query.of("Two", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var oneResult = sut.rewrite(one);
var twoResult = sut.rewrite(two);
assertThat(oneResult, is(twoResult));
assertThat(one, is(oneResult));
}
@Test
void notDuplicateSimpleTest() {
var one = Query.of("One", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var two = Query.of("Two", (builder, x, y) -> builder.clause((z) -> List.of(
friendView.call(x, y),
friendView.call(y, z)
)));
var oneResult = sut.rewrite(one);
var twoResult = sut.rewrite(two);
assertThat(one, is(oneResult));
assertThat(two, is(twoResult));
}
@Test
void removeDuplicateRecursiveTest() {
var oneSubQuery = Query.of("OneSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var one = Query.of("One", (builder, x) -> builder.clause(
oneSubQuery.call(x, Variable.of())
));
var twoSubQuery = Query.of("TwoSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var two = Query.of("Two", (builder, x) -> builder.clause(
twoSubQuery.call(x, Variable.of())
));
var oneResult = sut.rewrite(one);
var twoResult = sut.rewrite(two);
assertThat(oneResult, is(twoResult));
assertThat(one, is(oneResult));
}
@Test
void notDuplicateRecursiveTest() {
var oneSubQuery = Query.of("OneSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var one = Query.of("One", (builder, x) -> builder.clause(
oneSubQuery.call(x, Variable.of())
));
var twoSubQuery = Query.of("TwoSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var two = Query.of("Two", (builder, x) -> builder.clause(
twoSubQuery.call(Variable.of(), x)
));
var oneResult = sut.rewrite(one);
var twoResult = sut.rewrite(two);
assertThat(one, is(oneResult));
assertThat(oneResult, is(not(twoResult)));
var oneCall = (AbstractCallLiteral) oneResult.getDnf().getClauses().get(0).literals().get(0);
var twoCall = (AbstractCallLiteral) twoResult.getDnf().getClauses().get(0).literals().get(0);
assertThat(oneCall.getTarget(), is(twoCall.getTarget()));
}
@Test
void removeContradictionTest() {
var oneSubQuery = Query.of("OneSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var twoSubQuery = Query.of("TwoSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var query = Query.of("Contradiction", (builder, x, y) -> builder.clause(
oneSubQuery.call(x, y),
not(twoSubQuery.call(x, y))
));
var result = sut.rewrite(query);
assertThat(result.getDnf().getReduction(), is(Reduction.ALWAYS_FALSE));
}
@Test
void removeQuantifiedContradictionTest() {
var oneSubQuery = Query.of("OneSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var twoSubQuery = Query.of("TwoSubQuery", (builder, x, y) -> builder.clause(
friendView.call(x, y),
friendView.call(y, x)
));
var query = Query.of("Contradiction", (builder, x) -> builder.clause(
oneSubQuery.call(x, Variable.of()),
not(twoSubQuery.call(x, Variable.of()))
));
var result = sut.rewrite(query);
assertThat(result.getDnf().getReduction(), is(Reduction.ALWAYS_FALSE));
}
}
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