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package hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.tests.cardinality
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.Dimension
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.LinearConstraint
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.Polyhedron
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.PolyhedronSaturationOperator
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.PolyhedronSaturationResult
import hu.bme.mit.inf.dslreasoner.viatrasolver.logic2viatra.cardinality.PolyhedronSolver
import org.junit.After
import org.junit.Before
import org.junit.Test
import static org.junit.Assert.*
abstract class PolyhedronSolverTest {
var PolyhedronSolver solver
var PolyhedronSaturationOperator operator
protected def PolyhedronSolver createSolver()
@Before
def void setUp() {
solver = createSolver()
}
@After
def void tearDown() {
destroyOperatorIfExists()
}
@Test
def void singleDimensionTest() {
val x = new Dimension("x", 0, 1)
createSaturationOperator(new Polyhedron(#[x], #[], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(0, x.lowerBound)
assertEquals(1, x.upperBound)
}
@Test
def void singleDimensionNegativeValueTest() {
val x = new Dimension("x", -2, -1)
createSaturationOperator(new Polyhedron(#[x], #[], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(-2, x.lowerBound)
assertEquals(-1, x.upperBound)
}
@Test
def void singleDimensionConstraintTest() {
val x = new Dimension("x", null, null)
val constraint = new LinearConstraint(#{x -> 2}, 0, 2)
createSaturationOperator(new Polyhedron(#[x], #[constraint], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(0, x.lowerBound)
assertEquals(1, x.upperBound)
}
@Test
def void singleDimensionConstraintUnitCoefficientTest() {
val x = new Dimension("x", null, null)
val constraint = new LinearConstraint(#{x -> 1}, 1, 3)
createSaturationOperator(new Polyhedron(#[x], #[constraint], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(1, x.lowerBound)
assertEquals(3, x.upperBound)
}
@Test
def void singleDimensionConstraintIntegerTest() {
val x = new Dimension("x", null, null)
val constraint = new LinearConstraint(#{x -> 2}, 0, 3)
createSaturationOperator(new Polyhedron(#[x], #[constraint], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(0, x.lowerBound)
assertEquals(1, x.upperBound)
}
@Test
def void singleDimensionUnboundedFromAboveTest() {
val x = new Dimension("x", 0, null)
createSaturationOperator(new Polyhedron(#[x], #[], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(0, x.lowerBound)
assertEquals(null, x.upperBound)
}
@Test
def void singleDimensionUnboundedFromBelowTest() {
val x = new Dimension("x", null, 0)
createSaturationOperator(new Polyhedron(#[x], #[], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(null, x.lowerBound)
assertEquals(0, x.upperBound)
}
@Test
def void singleDimensionUnsatisfiableTest() {
val x = new Dimension("x", 0, 1)
val constraint = new LinearConstraint(#{x -> 2}, -2, -1)
createSaturationOperator(new Polyhedron(#[x], #[constraint], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.EMPTY, result)
}
@Test
def void equalityConstraintTest() {
val x = new Dimension("x", null, null)
val y = new Dimension("y", 1, 2)
val constraint = new LinearConstraint(#{x -> 2, y -> 2}, 6, 6)
createSaturationOperator(new Polyhedron(#[x, y], #[constraint], #[x]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(1, x.lowerBound)
assertEquals(2, x.upperBound)
}
@Test
def void saturateConstraintTest() {
val x = new Dimension("x", 0, 2)
val y = new Dimension("y", 1, 2)
val constraint = new LinearConstraint(#{x -> 2, y -> 1}, 0, 8)
createSaturationOperator(new Polyhedron(#[x, y], #[constraint], #[constraint]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(1, constraint.lowerBound)
assertEquals(6, constraint.upperBound)
}
@Test(expected=IllegalArgumentException)
def void unknownVariableTest() {
val x = new Dimension("x", 0, 1)
val y = new Dimension("y", 0, 1)
val constraint = new LinearConstraint(#{y -> 2}, 0, 2)
createSaturationOperator(new Polyhedron(#[x], #[constraint], #[x]))
saturate()
}
@Test
def void unsatisfiableMultipleInheritanceTest() {
val x = new Dimension("x", 0, 1)
val y = new Dimension("y", 0, 1)
val z = new Dimension("z", 0, 1)
createSaturationOperator(new Polyhedron(
#[x, y, z],
#[
new LinearConstraint(#{x -> 1, y -> 1}, 1, 1),
new LinearConstraint(#{x -> 1, z -> 1}, 1, 1),
new LinearConstraint(#{y -> 1, z -> 1}, 1, 1)
],
#[x, y, z]
))
val result = saturate()
assertEquals(PolyhedronSaturationResult.EMPTY, result)
}
@Test
def void unboundedRelaxationWithNoIntegerSolutionTest() {
val x = new Dimension("x", 0, 1)
val y = new Dimension("y", 0, null)
createSaturationOperator(new Polyhedron(
#[x, y],
#[new LinearConstraint(#{x -> 2}, 1, 1)],
#[x, y]
))
val result = saturate()
assertEquals(PolyhedronSaturationResult.EMPTY, result)
}
@Test
def void emptyConstraintTest() {
val constraint = new LinearConstraint(emptyMap, 0, 1)
createSaturationOperator(new Polyhedron(#[], #[constraint], #[constraint]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.SATURATED, result)
assertEquals(0, constraint.lowerBound)
assertEquals(0, constraint.upperBound)
}
@Test
def void emptyConstraintUnsatisfiableTest() {
val constraint = new LinearConstraint(emptyMap, 1, 0)
createSaturationOperator(new Polyhedron(#[], #[constraint], #[constraint]))
val result = saturate()
assertEquals(PolyhedronSaturationResult.EMPTY, result)
}
private def createSaturationOperator(Polyhedron polyhedron) {
destroyOperatorIfExists()
operator = solver.createSaturationOperator(polyhedron)
}
private def destroyOperatorIfExists() {
if (operator !== null) {
operator.close
}
}
private def saturate() {
operator.saturate
}
}
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