DecimalEqualsTest

Complexity

Total Complexity

4

Size/Duplication

Total Lines	59
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	2

Importance

Changes	6
Bugs	0	Features	3

4 Methods

Rating	Name	Duplication	Size	Complexity
A	testSimpleEquals()	0	15	1
A	testSimpleNotEquals()	0	9	1
B	testScaledEquals()	0	24	1
A	testScaledNotEquals()	0	5	1

<?php

use Litipk\BigNumbers\Decimal as Decimal;


date_default_timezone_set('UTC');


class DecimalEqualsTest extends PHPUnit_Framework_TestCase
{
    public function testSimpleEquals()
    {
        // Transitivity & inter-types constructors compatibility
        $this->assertTrue(Decimal::fromInteger(1)->equals(Decimal::fromString("1")));
        $this->assertTrue(Decimal::fromString("1")->equals(Decimal::fromFloat(1.0)));
        $this->assertTrue(Decimal::fromInteger(1)->equals(Decimal::fromFloat(1.0)));

        // Reflexivity
        $this->assertTrue(Decimal::fromInteger(1)->equals(Decimal::fromInteger(1)));

        // Symmetry
        $this->assertTrue(Decimal::fromString("1")->equals(Decimal::fromInteger(1)));
        $this->assertTrue(Decimal::fromFloat(1.0)->equals(Decimal::fromString("1")));
        $this->assertTrue(Decimal::fromFloat(1.0)->equals(Decimal::fromInteger(1)));
    }

    public function testSimpleNotEquals()
    {
        // Symmetry
        $this->assertFalse(Decimal::fromInteger(1)->equals(Decimal::fromInteger(2)));
        $this->assertFalse(Decimal::fromInteger(2)->equals(Decimal::fromInteger(1)));

        $this->assertFalse(Decimal::fromFloat(1.01)->equals(Decimal::fromInteger(1)));
        $this->assertFalse(Decimal::fromInteger(1)->equals(Decimal::fromFloat(1.01)));
    }

    public function testScaledEquals()
    {
        // Transitivity
        $this->assertTrue(Decimal::fromFloat(1.001)->equals(Decimal::fromFloat(1.01), 1));
        $this->assertTrue(Decimal::fromFloat(1.01)->equals(Decimal::fromFloat(1.004), 1));
        $this->assertTrue(Decimal::fromFloat(1.001)->equals(Decimal::fromFloat(1.004), 1));

        // Reflexivity
        $this->assertTrue(Decimal::fromFloat(1.00525)->equals(Decimal::fromFloat(1.00525), 2));

        // Symmetry
        $this->assertTrue(Decimal::fromFloat(1.01)->equals(Decimal::fromFloat(1.001), 1));
        $this->assertTrue(Decimal::fromFloat(1.004)->equals(Decimal::fromFloat(1.01), 1));
        $this->assertTrue(Decimal::fromFloat(1.004)->equals(Decimal::fromFloat(1.001), 1));

        // Proper rounding
        $this->assertTrue(Decimal::fromFloat(1.004)->equals(Decimal::fromFloat(1.000), 2));

        // Warning, float to Decimal conversion can have unexpected behaviors, like converting
        // 1.005 to Decimal("1.0049999999999999")
        $this->assertTrue(Decimal::fromFloat(1.0050000000001)->equals(Decimal::fromFloat(1.010), 2));

        $this->assertTrue(Decimal::fromString("1.005")->equals(Decimal::fromString("1.010"), 2));
    }

    public function testScaledNotEquals()
    {
        # Proper rounding
        $this->assertFalse(Decimal::fromFloat(1.004)->equals(Decimal::fromFloat(1.0050000000001), 2));
    }
}