Moontoast\Math\BigNumberTest::testIncrement PHP Method

    public function testIncrement()
    {
        $bn = new BigNumber('9223372036854775808');
        $this->assertSame($bn, $bn->increment());
        $this->assertSame('9223372036854775809', $bn->getValue());
        $bn->setScale(3);
        $this->assertSame('9223372036854775810.000', $bn->increment()->getValue());
    }