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/*
* SPDX-FileCopyrightText: 2023 The Refinery Authors <https://refinery.tools/>
*
* SPDX-License-Identifier: EPL-2.0
*/
package tools.refinery.store.query.dnf;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.Arguments;
import org.junit.jupiter.params.provider.MethodSource;
import tools.refinery.store.query.literal.BooleanLiteral;
import tools.refinery.store.query.literal.Literal;
import tools.refinery.store.query.term.DataVariable;
import tools.refinery.store.query.term.NodeVariable;
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.FunctionView;
import tools.refinery.store.query.view.KeyOnlyView;
import tools.refinery.store.representation.Symbol;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Stream;
import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.not;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static tools.refinery.store.query.literal.Literals.not;
import static tools.refinery.store.query.term.int_.IntTerms.INT_SUM;
class VariableDirectionTest {
private static final Symbol<Boolean> person = Symbol.of("Person", 1);
private static final Symbol<Boolean> friend = Symbol.of("friend", 2);
private static final Symbol<Integer> age = Symbol.of("age", 1, Integer.class);
private static final AnySymbolView personView = new KeyOnlyView<>(person);
private static final AnySymbolView friendView = new KeyOnlyView<>(friend);
private static final FunctionView<Integer> ageView = new FunctionView<>(age);
private static final NodeVariable p = Variable.of("p");
private static final NodeVariable q = Variable.of("q");
private static final DataVariable<Integer> x = Variable.of("x", Integer.class);
private static final DataVariable<Integer> y = Variable.of("y", Integer.class);
private static final DataVariable<Integer> z = Variable.of("z", Integer.class);
@ParameterizedTest
@MethodSource("clausesWithVariableInput")
void unboundOutVariableTest(List<? extends Literal> clause) {
var builder = Dnf.builder().parameter(p, ParameterDirection.OUT).clause(clause);
assertThrows(InvalidClauseException.class, builder::build);
}
@ParameterizedTest
@MethodSource("clausesWithVariableInput")
void unboundInVariableTest(List<? extends Literal> clause) {
var builder = Dnf.builder().parameter(p, ParameterDirection.IN).clause(clause);
var dnf = assertDoesNotThrow(builder::build);
var clauses = dnf.getClauses();
if (clauses.size() > 0) {
assertThat(clauses.get(0).positiveVariables(), hasItem(p));
}
}
@ParameterizedTest
@MethodSource("clausesWithVariableInput")
void boundPrivateVariableTest(List<? extends Literal> clause) {
var clauseWithBinding = new ArrayList<Literal>(clause);
clauseWithBinding.add(personView.call(p));
var builder = Dnf.builder().clause(clauseWithBinding);
var dnf = assertDoesNotThrow(builder::build);
var clauses = dnf.getClauses();
if (clauses.size() > 0) {
assertThat(clauses.get(0).positiveVariables(), hasItem(p));
}
}
static Stream<Arguments> clausesWithVariableInput() {
return Stream.concat(
clausesNotBindingVariable(),
literalToClauseArgumentStream(literalsWithRequiredVariableInput())
);
}
@ParameterizedTest
@MethodSource("clausesNotBindingVariable")
void unboundPrivateVariableTest(List<? extends Literal> clause) {
var builder = Dnf.builder().clause(clause);
var dnf = assertDoesNotThrow(builder::build);
var clauses = dnf.getClauses();
if (clauses.size() > 0) {
assertThat(clauses.get(0).positiveVariables(), not(hasItem(p)));
}
}
@ParameterizedTest
@MethodSource("clausesNotBindingVariable")
void unboundByEquivalencePrivateVariableTest(List<? extends Literal> clause) {
var r = Variable.of("r");
var clauseWithEquivalence = new ArrayList<Literal>(clause);
clauseWithEquivalence.add(r.isEquivalent(p));
var builder = Dnf.builder().clause(clauseWithEquivalence);
assertThrows(InvalidClauseException.class, builder::build);
}
static Stream<Arguments> clausesNotBindingVariable() {
return Stream.concat(
Stream.of(
Arguments.of(List.of()),
Arguments.of(List.of(BooleanLiteral.TRUE)),
Arguments.of(List.of(BooleanLiteral.FALSE))
),
literalToClauseArgumentStream(literalsWithPrivateVariable())
);
}
@ParameterizedTest
@MethodSource("literalsWithPrivateVariable")
void unboundTwicePrivateVariableTest(Literal literal) {
var builder = Dnf.builder().clause(not(personView.call(p)), literal);
assertThrows(InvalidClauseException.class, builder::build);
}
@ParameterizedTest
@MethodSource("literalsWithPrivateVariable")
void unboundTwiceByEquivalencePrivateVariableTest(Literal literal) {
var r = Variable.of("r");
var builder = Dnf.builder().clause(not(personView.call(r)), r.isEquivalent(p), literal);
assertThrows(InvalidClauseException.class, builder::build);
}
static Stream<Arguments> literalsWithPrivateVariable() {
var dnfWithOutput = Dnf.builder("WithOutput")
.parameter(p, ParameterDirection.OUT)
.parameter(q, ParameterDirection.OUT)
.clause(friendView.call(p, q))
.build();
var dnfWithOutputToAggregate = Dnf.builder("WithOutputToAggregate")
.parameter(p, ParameterDirection.OUT)
.parameter(q, ParameterDirection.OUT)
.parameter(x, ParameterDirection.OUT)
.clause(
friendView.call(p, q),
ageView.call(q, x)
)
.build();
return Stream.of(
Arguments.of(not(friendView.call(p, q))),
Arguments.of(y.assign(friendView.count(p, q))),
Arguments.of(y.assign(ageView.aggregate(INT_SUM, p))),
Arguments.of(not(dnfWithOutput.call(p, q))),
Arguments.of(y.assign(dnfWithOutput.count(p, q))),
Arguments.of(y.assign(dnfWithOutputToAggregate.aggregateBy(z, INT_SUM, p, q, z)))
);
}
@ParameterizedTest
@MethodSource("literalsWithRequiredVariableInput")
void unboundPrivateVariableTest(Literal literal) {
var builder = Dnf.builder().clause(literal);
assertThrows(InvalidClauseException.class, builder::build);
}
@ParameterizedTest
@MethodSource("literalsWithRequiredVariableInput")
void boundPrivateVariableInputTest(Literal literal) {
var builder = Dnf.builder().clause(personView.call(p), literal);
var dnf = assertDoesNotThrow(builder::build);
assertThat(dnf.getClauses().get(0).positiveVariables(), hasItem(p));
}
static Stream<Arguments> literalsWithRequiredVariableInput() {
var dnfWithInput = Dnf.builder("WithInput")
.parameter(p, ParameterDirection.IN)
.parameter(q, ParameterDirection.OUT)
.clause(friendView.call(p, q)).build();
var dnfWithInputToAggregate = Dnf.builder("WithInputToAggregate")
.parameter(p, ParameterDirection.IN)
.parameter(q, ParameterDirection.OUT)
.parameter(x, ParameterDirection.OUT)
.clause(
friendView.call(p, q),
ageView.call(q, x)
).build();
return Stream.of(
Arguments.of(dnfWithInput.call(p, q)),
Arguments.of(dnfWithInput.call(p, p)),
Arguments.of(not(dnfWithInput.call(p, q))),
Arguments.of(not(dnfWithInput.call(p, p))),
Arguments.of(y.assign(dnfWithInput.count(p, q))),
Arguments.of(y.assign(dnfWithInput.count(p, p))),
Arguments.of(y.assign(dnfWithInputToAggregate.aggregateBy(z, INT_SUM, p, q, z))),
Arguments.of(y.assign(dnfWithInputToAggregate.aggregateBy(z, INT_SUM, p, p, z)))
);
}
@ParameterizedTest
@MethodSource("literalsWithVariableOutput")
void boundParameterTest(Literal literal) {
var builder = Dnf.builder().parameter(p, ParameterDirection.OUT).clause(literal);
var dnf = assertDoesNotThrow(builder::build);
assertThat(dnf.getClauses().get(0).positiveVariables(), hasItem(p));
}
@ParameterizedTest
@MethodSource("literalsWithVariableOutput")
void boundTwiceParameterTest(Literal literal) {
var builder = Dnf.builder().parameter(p, ParameterDirection.IN).clause(literal);
var dnf = assertDoesNotThrow(builder::build);
assertThat(dnf.getClauses().get(0).positiveVariables(), hasItem(p));
}
@ParameterizedTest
@MethodSource("literalsWithVariableOutput")
void boundPrivateVariableOutputTest(Literal literal) {
var dnfWithInput = Dnf.builder("WithInput")
.parameter(p, ParameterDirection.IN)
.clause(personView.call(p))
.build();
var builder = Dnf.builder().clause(dnfWithInput.call(p), literal);
var dnf = assertDoesNotThrow(builder::build);
assertThat(dnf.getClauses().get(0).positiveVariables(), hasItem(p));
}
@ParameterizedTest
@MethodSource("literalsWithVariableOutput")
void boundTwicePrivateVariableOutputTest(Literal literal) {
var builder = Dnf.builder().clause(personView.call(p), literal);
var dnf = assertDoesNotThrow(builder::build);
assertThat(dnf.getClauses().get(0).positiveVariables(), hasItem(p));
}
static Stream<Arguments> literalsWithVariableOutput() {
var dnfWithOutput = Dnf.builder("WithOutput")
.parameter(p, ParameterDirection.OUT)
.parameter(q, ParameterDirection.OUT)
.clause(friendView.call(p, q))
.build();
return Stream.of(
Arguments.of(friendView.call(p, q)),
Arguments.of(dnfWithOutput.call(p, q))
);
}
private static Stream<Arguments> literalToClauseArgumentStream(Stream<Arguments> literalArgumentsStream) {
return literalArgumentsStream.map(arguments -> Arguments.of(List.of(arguments.get()[0])));
}
}
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