minor note: Лучше делать так:
```python
compartments = Warship.build_compartments(0, 0, 0, 2)
expected_compartments = [[0, 0, self.COMP_NORMAL], [0, 1, self.COMP_NORMAL], [0, 2, self.COMP_NORMAL],]
eq_(compartments, expected_compartments)
```