public function testIsLessThan()
{
$bn1 = new BigNumber('9223372036854775808.123456', 6);
$bn2 = new BigNumber('9223372036854775808.123461', 6);
$this->assertTrue($bn1->isLessThan($bn2));
$this->assertFalse($bn2->isLessThan($bn1));
$bn1->setScale(4);
$this->assertFalse($bn1->isLessThan($bn2));
$bn2->setScale(4);
$this->assertFalse($bn2->isLessThan($bn1));
}