/**
  * @test
  * @covers ::__construct
  * @covers ::add
  * @covers ::create
  * @covers ::count
  * @covers ::setGenerator
  * @uses App\ContactBook
  * @uses App\ContactNotFoundException
  * @uses App\Contact
  * @uses App\Generator
  */
 public function should_return_all_number_of_contacts()
 {
     $this->addSomeContacts();
     $count = $this->contactBookManager->count();
     $this->assertEquals(2, $count);
 }