/**
* 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 java.math.BigDecimal;
import java.math.RoundingMode;
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 TestLongUnderflow {
private long x;
private long y;
// Creates the test data
@Parameters
public static Collection<Object[]> data() {
Object[] values = new Object[] { Long.MIN_VALUE, Long.MIN_VALUE/2, 0, Long.MAX_VALUE/ 2, Long.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 TestLongUnderflow(long x, long y) {
this.x = x;
this.y = y;
}
private void assertUnderflow(BigDecimal preciseResult, int distance, long longResult) {
BigDecimal maxResult = new BigDecimal(Long.MIN_VALUE);
if(preciseResult.compareTo(maxResult) < 0) {
assertTrue("Expected negative value for "+x+" and "+y+": "+distance+" for "+longResult, distance < 0);
} else {
assertTrue("Expected positive value for "+x+" and "+y+": "+distance, distance >= 0);
}
}
@Test
public void testAddUnderflow() {
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.LADD);
assertUnderflow(new BigDecimal(x).add(new BigDecimal(y)), result, x + y);
}
@Test
public void testSubUnderflow() {
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.LSUB);
assertUnderflow(new BigDecimal(x).subtract(new BigDecimal(y)), result, x - y);
}
@Test
public void testMulUnderflow() {
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.LMUL);
assertUnderflow(new BigDecimal(x).multiply(new BigDecimal(y)), result, x * y);
}
@Test
public void testDivUnderflow() {
Assume.assumeTrue(y != 0L);
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.LDIV);
assertUnderflow(new BigDecimal(x).divide(new BigDecimal(y), 10, RoundingMode.HALF_UP), result, x / y);
}
}