beautify code, ajout méthode pluck et toArray à l'objet collection

tests/CollectionTest.php

@@ -50,5 +50,26 @@ test("collection", function () {
         return $item + $carry;
     },$init);
     expect($reduce)->toBe(55);
+
+    $array = $coll->toArray();
+    expect($array)->toBeArray();
+    expect(count($array))->toBe(11);
+
+    $obj = new \stdClass();
+    $obj->key = "test";
+    $obj->val = 1;
+
+    $obj2 = new \stdClass();
+    $obj2->key = "test2";
+    $obj2->val = 2;
+
+    $collo = new Collection([$obj,$obj2]);
+    expect($collo)->toBeInstanceOf(Collection::class);
+    expect(count($collo))->toBe(2);
+
+    $pluck = $collo->pluck("key");
+    expect($pluck)->toBeInstanceOf(Collection::class);
+    expect(count($pluck))->toBe(2);
+    expect($pluck->first())->toBe("test");
 });