invoiceninja/tests/Unit/TaskSortingTest.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2021. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */
namespace Tests\Unit;

use Tests\TestCase;

/**
 * @test
 */
class TaskSortingTest extends TestCase
{
    public $collection;

    public function setUp() :void
    {
        parent::setUp();

        $this->collection = collect([
            ['id' => 1, 'name' =>'pizza', 'order' => 9999],
            ['id' => 2, 'name' =>'pineapple', 'order' => 9999],
            ['id' => 3, 'name' =>'ethereum', 'order' => 9999],
            ['id' => 4, 'name' =>'bitcoin', 'order' => 9999],
            ['id' => 5, 'name' =>'zulu', 'order' => 9999],
            ['id' => 6, 'name' =>'alpha', 'order' => 9999],
            ['id' => 7, 'name' =>'ninja', 'order' => 9999],
        ]);

    }

    public function testSorting()
    {

        $index = 3;
        $item = $this->collection->where('id', 7)->first();

        $new_collection = $this->collection->reject(function ($task)use($item){
            return $item['id'] == $task['id'];
        });

        $sorted_tasks = $new_collection->filter(function($task, $key)use($index){
            return $key < $index;
        })->push($item)->merge($new_collection->filter(function($task, $key)use($index){
            return $key >= $index;
        }))->map(function ($item,$key){
            $item['order'] = $key;
            return $item;
        });

        $index_item = $sorted_tasks->splice($index, 1)->all();

        $this->assertEquals($sorted_tasks->first()['name'], 'pizza');
        $this->assertEquals($sorted_tasks->last()['name'], 'alpha');
        $this->assertEquals($index_item[0]['name'],'ninja');

    }
}