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package org.python.core;
import junit.framework.TestCase;
public class PyFloatTest extends TestCase {
private final static double nan = Double.NaN;
private final static double inf = Double.POSITIVE_INFINITY;
private final static double ninf = Double.NEGATIVE_INFINITY;
/**
* test the basic behavior of java.lang.Double extreme values
*/
public void test_Double_InfinityAndNaN() {
assertTrue(Double.NaN != nan); // this is the definition of NaN
assertTrue(Double.isNaN(nan));
assertFalse(Double.isInfinite(nan));
assertTrue(Double.POSITIVE_INFINITY == inf);
assertFalse(Double.isNaN(inf));
assertTrue(Double.isInfinite(inf));
assertTrue(Double.NEGATIVE_INFINITY == ninf);
assertFalse(Double.isNaN(ninf));
assertTrue(Double.isInfinite(ninf));
assertTrue(nan != inf);
assertTrue(nan != ninf);
assertTrue(inf != ninf);
}
/**
* test extreme values
*/
public void testInfinityAndNaN() {
PyFloat fNan = new PyFloat(Double.NaN);
PyFloat fInf = new PyFloat(Double.POSITIVE_INFINITY);
PyFloat fNinf = new PyFloat(Double.NEGATIVE_INFINITY);
assertTrue(Double.NaN != fNan.getValue()); // this is the definition of NaN
assertTrue(Double.isNaN(fNan.getValue()));
assertFalse(Double.isInfinite(fNan.getValue()));
assertTrue(Double.POSITIVE_INFINITY == fInf.getValue());
assertFalse(Double.isNaN(fInf.getValue()));
assertTrue(Double.isInfinite(fInf.getValue()));
assertTrue(Double.NEGATIVE_INFINITY == fNinf.getValue());
assertFalse(Double.isNaN(fNinf.getValue()));
assertTrue(Double.isInfinite(fNinf.getValue()));
assertTrue(fNan.getValue() != fInf.getValue());
assertTrue(fNan.getValue() != fNinf.getValue());
assertTrue(fInf.getValue() != fNinf.getValue());
}
/**
* test formatting of extreme values
*/
public void testInfinityAndNaN_repr() {
PyFloat fNan = new PyFloat(Double.NaN);
PyFloat fInf = new PyFloat(Double.POSITIVE_INFINITY);
PyFloat fNinf = new PyFloat(Double.NEGATIVE_INFINITY);
assertEquals("nan", String.valueOf(fNan.__repr__()));
assertEquals("inf", String.valueOf(fInf.__repr__()));
assertEquals("-inf", String.valueOf(fNinf.__repr__()));
}
}
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