assert 2 + 2 == 4import unittest
class TestAdd(unittest.TestCase):
def test_add(self):
self.assertEqual(1+1, 2)def test_add(): assert 1+1 == 2
## Mocking
```python
from unittest.mock import Mock
m = Mock(return_value=42)
print(m())
import logging
logging.info('Info!')import pdb; pdb.set_trace()