/**
* 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.assertEquals;
import static org.junit.Assert.assertTrue;
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 TestFloatUnderflow {
private float x;
private float y;
// Creates the test data
@Parameters
public static Collection<Object[]> data() {
Object[] values = new Object[] { (- Float.MAX_VALUE), (- Float.MAX_VALUE)/2, 0, Float.MAX_VALUE/ 2, Float.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 TestFloatUnderflow(float x, float y) {
this.x = x;
this.y = y;
}
private void assertUnderflow(double doubleResult, int distance, float floatResult) {
if(doubleResult < -Float.MAX_VALUE) {
assertTrue("Expected negative value for "+x+" and "+y+": "+distance, distance < 0);
assertEquals(Float.NEGATIVE_INFINITY, floatResult, 0.0F);
} else {
assertTrue("Expected positive value for "+x+" and "+y+": "+distance, distance >= 0);
}
}
@Test
public void testAddUnderflow() {
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.FADD);
assertUnderflow((double)x + (double)y, result, x + y);
}
@Test
public void testSubUnderflow() {
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.FSUB);
assertUnderflow((double)x - (double)y, result, x - y);
}
@Test
public void testMulUnderflow() {
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.FMUL);
assertUnderflow((double)x * (double)y, result, x * y);
}
@Test
public void testDivUnderflow() {
Assume.assumeTrue(y != 0F);
int result = ErrorConditionChecker.underflowDistance(x, y, Opcodes.FDIV);
assertUnderflow((double)x / (double)y, result, x / y);
}
}