<?php

use Kletellier\PdoWrapper\Collection; 

test("collection", function () {
    $arr = [];
    for ($i=0; $i < 11; $i++) { 
        $arr[] = $i;
    }

    expect(count($arr))->toBe(11);

    $coll = new Collection($arr);
    expect($coll->count())->toBe(11);
    expect($coll->first())->toBe(0);
    expect($coll->last())->toBe(10);

    $filt = $coll->filter(function($item){ return $item<5;});    
    expect($filt)->toBeInstanceOf(Collection::class);
    expect($filt->count())->toBe(5);
    expect($filt->first())->toBe(0);
    expect($filt->last())->toBe(4);

    // no change in initial collection
    expect($coll->count())->toBe(11);

    expect($coll->empty())->toBe(false);

    expect($coll->items())->toBeArray();
    expect(count($coll->items()))->toBe(11);

    $incr = 0;
    $coll->each(function($item) use(&$incr){
        $incr++;
    });
    expect($incr)->toBe(11);

    $colmap = $coll->map(function($item) {
        return $item+1;
    });
    expect($colmap)->toBeInstanceOf(Collection::class);
    expect($colmap->count())->toBe(11);
    expect($colmap->first())->toBe(1);
    expect($colmap->last())->toBe(11);

    $init = 0;
    $reduce = $coll->reduce(function($item,$carry){
        return $item + $carry;
    },$init);
    expect($reduce)->toBe(55);
});