/**
* Test that isNegative() returns true if the number is below 0.
*/
public function testIsNegative()
{
$this->assertTrue(Number::isNegative(-1));
$this->assertTrue(Number::isNegative(-384));
$this->assertFalse(Number::isNegative(0));
$this->assertFalse(Number::isNegative(34));
}
