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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.Dnf;
import tools.refinery.store.query.dnf.Query;
import tools.refinery.store.query.term.ParameterDirection;
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 tools.refinery.store.query.literal.Literals.not;
import static tools.refinery.store.query.tests.QueryMatchers.structurallyEqualTo;
class InputParameterResolverTest {
private final static Symbol<Boolean> person = Symbol.of("Person", 1);
private final static Symbol<Boolean> friend = Symbol.of("friend", 2);
private final static AnySymbolView personView = new KeyOnlyView<>(person);
private final static AnySymbolView friendView = new KeyOnlyView<>(friend);
private InputParameterResolver sut;
@BeforeEach
void beforeEach() {
sut = new InputParameterResolver();
}
@Test
void inlineSingleClauseTest() {
var dnf = Dnf.of("SubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.OUT);
builder.clause(friendView.call(x, Variable.of()));
});
var query = Query.of("Actual", (builder, x) -> builder.clause(
dnf.call(x),
personView.call(x)
));
var actual = sut.rewrite(query);
var expected = Query.of("Expected", (builder, x) -> builder.clause(
friendView.call(x, Variable.of()),
personView.call(x)
));
assertThat(actual.getDnf(), structurallyEqualTo(expected.getDnf()));
}
@Test
void inlineSingleClauseWIthInputTest() {
var dnf = Dnf.of("SubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.IN);
builder.clause(not(friendView.call(x, Variable.of())));
});
var query = Query.of("Actual", (builder, x) -> builder.clause(
dnf.call(x),
personView.call(x)
));
var actual = sut.rewrite(query);
var expected = Query.of("Expected", (builder, x) -> builder.clause(
personView.call(x),
not(friendView.call(x, Variable.of()))
));
assertThat(actual.getDnf(), structurallyEqualTo(expected.getDnf()));
}
@Test
void singleLiteralDemandSetTest() {
var dnf = Dnf.of("SubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.IN);
builder.clause(not(friendView.call(x, Variable.of())));
builder.clause(not(friendView.call(Variable.of(), x)));
});
var query = Query.of("Actual", (builder, x) -> builder.clause(
dnf.call(x),
personView.call(x)
));
var actual = sut.rewrite(query);
var expectedSubQuery = Dnf.of("ExpectedSubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.OUT);
builder.clause(
personView.call(x),
not(friendView.call(x, Variable.of()))
);
builder.clause(
personView.call(x),
not(friendView.call(Variable.of(), x))
);
});
var expected = Query.of("Expected", (builder, x) -> builder.clause(
personView.call(x),
expectedSubQuery.call(x)
));
assertThat(actual.getDnf(), structurallyEqualTo(expected.getDnf()));
}
@Test
void multipleLiteralDemandSetTest() {
var dnf = Dnf.of("SubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.IN);
var y = builder.parameter("y", ParameterDirection.IN);
builder.clause(not(friendView.call(x, y)));
builder.clause(not(friendView.call(y, x)));
});
var query = Query.of("Actual", (builder, p1) -> builder.clause(p2 -> List.of(
not(dnf.call(p1, p2)),
personView.call(p1),
personView.call(p2)
)));
var actual = sut.rewrite(query);
var context = Dnf.of("Context", builder -> {
var x = builder.parameter("x", ParameterDirection.OUT);
var y = builder.parameter("y", ParameterDirection.OUT);
builder.clause(
personView.call(x),
personView.call(y)
);
});
var expectedSubQuery = Dnf.of("ExpectedSubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.OUT);
var y = builder.parameter("x", ParameterDirection.OUT);
builder.clause(
context.call(x, y),
not(friendView.call(x, y))
);
builder.clause(
context.call(x, y),
not(friendView.call(y, x))
);
});
var expected = Query.of("Expected", (builder, p1) -> builder.clause(p2 -> List.of(
context.call(p1, p2),
not(expectedSubQuery.call(p1, p2))
)));
assertThat(actual.getDnf(), structurallyEqualTo(expected.getDnf()));
}
@Test
void multipleParameterDemandSetTest() {
var dnf = Dnf.of("SubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.IN);
var y = builder.parameter("y", ParameterDirection.IN);
builder.clause(not(friendView.call(x, y)));
builder.clause(not(friendView.call(y, x)));
});
var query = Query.of("Actual", (builder, p1) -> builder.clause(
not(dnf.call(p1, p1)),
personView.call(p1)
));
var actual = sut.rewrite(query);
var expectedSubQuery = Dnf.of("ExpectedSubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.OUT);
var y = builder.parameter("y", ParameterDirection.OUT);
builder.clause(
y.isEquivalent(x),
personView.call(x),
not(friendView.call(x, x))
);
});
var expected = Query.of("Expected", (builder, p1) -> builder.clause(
personView.call(p1),
not(expectedSubQuery.call(p1, p1))
));
assertThat(actual.getDnf(), structurallyEqualTo(expected.getDnf()));
}
@Test
void eliminateDoubleNegationTest() {
var dnf = Dnf.of("SubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.IN);
builder.clause(not(friendView.call(x, Variable.of())));
});
var query = Query.of("Actual", (builder, p1) -> builder.clause(
personView.call(p1),
not(dnf.call(p1))
));
var actual = sut.rewrite(query);
var expected = Query.of("Actual", (builder, p1) -> builder.clause(
personView.call(p1),
friendView.call(p1, Variable.of())
));
assertThat(actual.getDnf(), structurallyEqualTo(expected.getDnf()));
}
@Test
void identityWhenNoWorkToDoTest() {
var dnf = Dnf.of("SubQuery", builder -> {
var x = builder.parameter("x", ParameterDirection.OUT);
builder.clause(
personView.call(x),
not(friendView.call(x, Variable.of()))
);
});
var query = Query.of("Actual", (builder, p1) -> builder.clause(
personView.call(p1),
not(dnf.call(p1))
));
var actual = sut.rewrite(query);
assertThat(actual, is(query));
}
}
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