DecimalSqrtTest

Complexity

Total Complexity

5

Size/Duplication

Total Lines	43
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	2

Importance

Changes	5
Bugs	0	Features	1

5 Methods

Rating	Name	Duplication	Size	Complexity
A	testIntegerSqrt()	0	9	1
A	testNearZeroSqrt()	0	5	1
A	testFiniteNegativeSqrt()	0	4	1
A	testPositiveInfiniteSqrt()	0	5	1
A	testNegativeInfiniteSqrt()	0	5	1

<?php

use Litipk\BigNumbers\Decimal as Decimal;


date_default_timezone_set('UTC');


class DecimalSqrtTest extends PHPUnit_Framework_TestCase
{
    public function testIntegerSqrt()
    {
        $this->assertTrue(Decimal::fromInteger(0)->sqrt()->equals(Decimal::fromInteger(0)));
        $this->assertTrue(Decimal::fromInteger(1)->sqrt()->equals(Decimal::fromInteger(1)));
        $this->assertTrue(Decimal::fromInteger(4)->sqrt()->equals(Decimal::fromInteger(2)));
        $this->assertTrue(Decimal::fromInteger(9)->sqrt()->equals(Decimal::fromInteger(3)));
        $this->assertTrue(Decimal::fromInteger(16)->sqrt()->equals(Decimal::fromInteger(4)));
        $this->assertTrue(Decimal::fromInteger(25)->sqrt()->equals(Decimal::fromInteger(5)));
    }

    public function testNearZeroSqrt()
    {
        $this->assertTrue(Decimal::fromString('0.01')->sqrt()->equals(Decimal::fromString('0.1')));
        $this->assertTrue(Decimal::fromString('0.0001')->sqrt()->equals(Decimal::fromString('0.01')));
    }

    /**
     * @expectedException \DomainException
     * @expectedExceptionMessage Decimal can't handle square roots of negative numbers (it's only for real numbers).
     */
    public function testFiniteNegativeSqrt()
    {
        Decimal::fromInteger(-1)->sqrt();
    }

    public function testPositiveInfiniteSqrt()
    {
        $pInf = Decimal::getPositiveInfinite();
        $this->assertTrue($pInf->sqrt()->equals($pInf));
    }

    /**
     * @expectedException \DomainException
     * @expectedExceptionMessage Decimal can't handle square roots of negative numbers (it's only for real numbers).
     */
    public function testNegativeInfiniteSqrt()
    {
        $nInf = Decimal::getNegativeInfinite();
        $nInf->sqrt();
    }
}