/**
* Copyright (C) 2010-2017 Gordon Fraser, Andrea Arcuri and EvoSuite
* contributors
*
* This file is part of EvoSuite.
*
* EvoSuite is free software: you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation, either version 3.0 of the License, or
* (at your option) any later version.
*
* EvoSuite is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with EvoSuite. If not, see <http://www.gnu.org/licenses/>.
*/
package org.evosuite.instrumentation.error;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.assertEquals;
import java.math.BigDecimal;
import java.util.ArrayList;
import java.util.Collection;
import java.util.List;
import org.evosuite.instrumentation.error.ErrorConditionChecker;
import org.junit.Assume;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import org.objectweb.asm.Opcodes;
@RunWith(Parameterized.class)
public class TestDoubleOverflow {
private double x;
private double y;
// Creates the test data
@Parameters
public static Collection<Object[]> data() {
Object[] values = new Object[] { -Double.MAX_VALUE, -Double.MIN_VALUE/2.0, 0.0, Double.MAX_VALUE/ 2.0, Double.MAX_VALUE};
List<Object[]> valuePairs = new ArrayList<Object[]>();
for(Object val1 : values) {
for(Object val2 : values) {
valuePairs.add(new Object[] {val1, val2});
}
}
return valuePairs;
}
public TestDoubleOverflow(double x, double y) {
this.x = x;
this.y = y;
}
private void assertOverflow(BigDecimal preciseResult, int distance, double doubleResult) {
BigDecimal maxResult = new BigDecimal(Double.MAX_VALUE);
if(preciseResult.compareTo(maxResult) > 0) {
assertTrue("Expected negative value for "+x+" and "+y+": "+distance, distance <= 0);
assertEquals(Double.POSITIVE_INFINITY, doubleResult, 0.0);
} else {
assertTrue("Expected positive value for "+x+" and "+y+": "+distance, distance > 0);
}
}
@Test
public void testAddOverflow() {
int result = ErrorConditionChecker.overflowDistance(x, y, Opcodes.DADD);
assertOverflow(new BigDecimal(x).add(new BigDecimal(y)), result, x + y);
}
@Test
public void testSubOverflow() {
int result = ErrorConditionChecker.overflowDistance(x, y, Opcodes.DSUB);
assertOverflow(new BigDecimal(x).subtract(new BigDecimal(y)), result, x - y);
}
@Test
public void testMulOverflow() {
int result = ErrorConditionChecker.overflowDistance(x, y, Opcodes.DMUL);
assertOverflow(new BigDecimal(x).multiply(new BigDecimal(y)), result, x * y);
}
@Test
public void testDivOverflow() {
Assume.assumeTrue(y != 0D);
int result = ErrorConditionChecker.overflowDistance(x, y, Opcodes.DDIV);
assertOverflow(new BigDecimal(x).divide(new BigDecimal(y)), result, x / y);
}
}