public void testDoubleValue() {
Fraction first = new Fraction(1, 2);
Fraction second = new Fraction(1, 3);
assertEquals(0.5, first.doubleValue(), 0.0);
assertEquals(1.0 / 3.0, second.doubleValue(), 0.0);
}
public void testCompareTo() {
Fraction first = new Fraction(1, 2);
Fraction second = new Fraction(1, 3);
Fraction third = new Fraction(1, 2);
assertEquals(0, first.compareTo(first));
assertEquals(0, first.compareTo(third));
assertEquals(1, first.compareTo(second));
assertEquals(-1, second.compareTo(first));
// these two values are different approximations of PI
// the first one is approximately PI - 3.07e-18
// the second one is approximately PI + 1.936e-17
Fraction pi1 = new Fraction(1068966896, 340262731);
Fraction pi2 = new Fraction(411557987, 131002976);
assertEquals(-1, pi1.compareTo(pi2));
assertEquals(1, pi2.compareTo(pi1));
assertEquals(0.0, pi1.doubleValue() - pi2.doubleValue(), 1.0e-20);
}
/** {@inheritDoc} */
@Override
public void visit(int row, int column, Fraction value) {
data[row][column] = value.doubleValue();
}