public function testRound()
{
bcscale(10);
$invoice = new Invoice();
$invoice->setCurrency('EUR', 2);
$this->assertEquals('1.25', $invoice->round('1.254'));
$this->assertEquals('1.26', $invoice->round('1.255'));
$this->assertEquals('1.26', $invoice->round('1.256'));
$invoice->setCurrency('JPY', 0);
$this->assertEquals('125', $invoice->round('125.4'));
$this->assertEquals('126', $invoice->round('125.5'));
$this->assertEquals('126', $invoice->round('125.6'));
}