ProgressTest.php

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<?php
namespace Magento\Setup\Test\Unit\Model\Installer;

use \Magento\Setup\Model\Installer\Progress;

class ProgressTest extends \PHPUnit\Framework\TestCase
{
    public function testConstructorExceptionInvalidTotal($total, $current)
    {
        new Progress($total, $current);
    }

    public function constructorExceptionInvalidTotalDataProvider()
    {
        return [[0,0], [0, 1], [[], 1]];
    }

    public function testConstructorExceptionCurrentExceedsTotal()
    {
        new Progress(1, 2);
    }

    public function testSetNext()
    {
        $progress = new Progress(10);
        $progress->setNext();
        $this->assertEquals(1, $progress->getCurrent());
    }

    public function testSetNextException()
    {
        $progress = new Progress(10, 10);
        $progress->setNext();
    }

    public function testFinish()
    {
        $progress = new Progress(10);
        $progress->finish();
        $this->assertEquals(10, $progress->getCurrent());
    }

    public function testGetCurrent()
    {
        $progress = new Progress(10, 5);
        $this->assertEquals(5, $progress->getCurrent());
    }

    public function testGetTotal()
    {
        $progress = new Progress(10);
        $this->assertEquals(10, $progress->getTotal());
    }

    public function testRatio($total, $current)
    {
        $progress = new Progress($total, $current);
        $this->assertEquals($current / $total, $progress->getRatio());
    }

    public function ratioDataProvider()
    {
        $data = [];
        for ($i = 10; $i <= 20; $i++) {
            for ($j = 0; $j <= $i; $j++) {
                $data[] = [$i, $j];
            }
        }
        return $data;
    }
}