/** @test */
public function it_can_reduce_a_collection_using_a_function()
{
$collection = new Collection([1, 2, 3, 4, 5]);
$sum = $collection->reduce(function ($carry, $item) {
$carry += $item;
return $carry;
});
$this->assertEquals(15, $sum);
$product = $collection->reduce(function ($carry, $item) {
$carry *= $item;
return $carry;
}, 10);
$this->assertEquals(1200, $product);
$sum2 = $collection->reduce(function ($carry, $item) {
$carry += $item;
return $carry;
}, 'No Data To Reduce');
$this->assertEquals(15, $sum2);
}
