implementation d'une classe de collection

tests/CollectionTest.php

@@ -0,0 +1,52 @@
+<?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);
+});
+