/** @test */
function a_customer_is_gold_if_they_have_the_respective_type()
{
$specification = new CustomerIsGold();
$goldCustomer = new Customer('gold');
$silverCustomer = new Customer('silver');
$this->assertTrue($specification->isSatisfiedBy($goldCustomer));
$this->assertFalse($specification->isSatisfiedBy($silverCustomer));
}
/**
* @param CustomerIsGold $specification
* @return array
*/
public function matchingSpecification(CustomerIsGold $specification)
{
return array_filter($this->all(), function ($item) use($specification) {
return $specification->isSatisfiedBy($item);
});
}