unittest.mock — Expert Examples

Mock objects for tests (Mock, MagicMock, patch)

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unittest.mock deep dive

Implementation details and performance considerations.

python
# unittest.mock internals
import unittest.mock
import sys

mod = unittest.mock
print(f"Module: {mod.__name__}")
print(f"File: {getattr(mod, '__file__', 'built-in')}")
print(f"Package: {getattr(mod, '__package__', 'N/A')}")
print(f"Size in modules: {sys.getsizeof(mod)} bytes")

Understanding the internals of unittest.mock helps write more efficient code.

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