Moontoast\Math\BigNumberTest::testIsNegative PHP Method

    public function testIsNegative()
    {
        $bn1 = new BigNumber(1234);
        $bn2 = new BigNumber(-1234);
        $bn3 = new BigNumber(0);
        $bn4 = new BigNumber('-0.0000', 3);
        $this->assertFalse($bn1->isNegative());
        $this->assertTrue($bn2->isNegative());
        $this->assertFalse($bn3->isNegative());
        $this->assertFalse($bn4->isNegative());
    }