def test_find_nonexistent_entry_by_name(self):
book = PhoneBook()
book.add_entry('João', '(11) 1234 4321')
entry = book.find_by_name('Maria')
self.assertIsNone(entry)
def test_add_entry(self):
book = PhoneBook()
book.add_entry('João', '(11) 1234 4321')
self.assertEqual(1, len(book.entries))
