public function testFilter()
{
$itemBefore = [['id' => 1, 'name' => 'Udonthani'], ['id' => 2, 'name' => 'Bangkok']];
$itemAfter = [['id' => 2, 'name' => 'Bangkok']];
$collection = new Collection($itemBefore);
$result = $collection->filter(function ($item) {
return $item['id'] == 2;
});
$this->assertInstanceOf(Collection::class, $result);
$this->assertEquals($itemAfter, $result->toArray());
}
