/**
* Tests the possibility of a "negative" string zero, i.e. "-0.000"
*
* The sign of -0 is still a negative sign. This is ultimately calculated
* by bccomp(), according to which, when -0.000 is compared to 0.000, it
* will return a -1, meaning -0.000 is less than 0.000, but -0 compared to
* 0 will return a 0, meaning the two are equal. This is odd, but it is the
* expected behavior.
*/
public function testNegativeZero()
{
$bn = new BigNumber('-0.0000005', 3);
$this->assertSame('-0.000', $bn->getValue());
$this->assertEquals(-1, $bn->signum());
$this->assertTrue($bn->isNegative());
}