function test_getContacts()
 {
     //arrange
     $name = "Business";
     $id = null;
     $test_category = new Category($name, $id);
     $test_category->save();
     $test_category_id = $test_category->getId();
     $contact_name = "Jane Doe";
     $phone_number = "555-555-5555";
     $address = "5 Main Street, Anytown, Anystate 55555";
     $test_contact = new Contact($contact_name, $phone_number, $address, $id, $test_category_id);
     $test_contact->save();
     $contact_name2 = "John Doe";
     $phone_number2 = "666-666-6666";
     $address2 = "6 Main Street, Anytown, Anystate 66666";
     $test_contact2 = new Contact($contact_name2, $phone_number2, $address2, $id, $test_category_id);
     $test_contact2->save();
     //act
     $result = $test_category->getContacts();
     //assert
     $this->assertEquals([$test_contact, $test_contact2], $result);
 }