JBZoo\PHPUnit\CalcTest::testInvert PHP Метод

    public function testInvert()
    {
        $val = val('1 eur');
        batchEqualDumps(array(array('-1 eur', $val->invert()->dump(false)), array('1 eur', $val->invert()->dump(false))));
        $val = val();
        batchEqualDumps(array(array('0 eur', $val->invert()->dump(false)), array('0 eur', $val->invert()->dump(false))));
    }