// The business logic
$allBoxes = CollectionOfBoxes::containing(
    Box::ofWeight(1),
    Box::ofWeight(2),
    Box::ofWeight(3),
    Box::ofWeight(5),
    Box::ofWeight(12),
    Box::ofWeight(26)
);
$weighBetween2and10 = AreHeavier::than(2)->and(AreLighter::than(10));
$this->assertEquals(
    CollectionOfBoxes::containing(
        Box::ofWeight(3),
        Box::ofWeight(5),
        Box::ofWeight(26)
    ),
    $allBoxes->that($weighBetween2and10->or(AreHeavier::than(20)))
);