Moontoast\Math\BigNumberTest::testAbs PHP Method

    public function testAbs()
    {
        $bn1 = new BigNumber('-1234.5678', 4);
        $bn2 = new BigNumber('5678');
        $bn3 = new BigNumber('0');
        $this->assertSame('1234.5678', $bn1->abs()->getValue());
        $this->assertSame('5678', $bn2->abs()->getValue());
        $this->assertSame('0', $bn3->abs()->getValue());
    }