import unittest
from unittest.mock import patch

class Number:
    def __init__(self, value):
        print(f'init: {value}')
        self.value = value

    def get_value(self):
        return self.value

class MockNumber:
    def __init__(self, value):
        print(f'mock init: {value}')
        self.value = value

    def get_value(self):
        return self.value

class TestNumber(unittest.TestCase):
    def setUp(self):
        pass

    def tearDown(self):
        pass

    def test_number(self):
        number = Number(1)
        with patch.object(Number, '__new__', return_value=number):
            test = Number(2)
            print(test.get_value())

        mock_number = MockNumber(1)
        with patch.object(Number, '__new__', return_value=mock_number):
            test = Number(2)
            print(test.get_value())

if __name__ == '__main__':
    unittest.main()