@Test
void shouldReturnAPet_whenFound() {

	var pet = new Pet();
	pet.setPetId(PET_ID);
	BDDMockito.given(petRepository.findById(PET_ID)).willReturn(Optional.of(pet));
	var petFound = petFinder.findById(PET_ID);
	Assertions.assertNotNull(petFound);
	Assertions.assertEquals(PET_ID, petFound.getPetId());
}