posener / mock-import

A helper mocking function to mask ImportErrors

mock_import

A helper mocking function to mask ImportError s on a scoped code. Failed imports will be ignored, unless specified by the do_not_mock argument.

Installation

Using pip: pip install mock-import

Usage

Import:

>>> from mock_import import mock_import

Mocking import for a code block:

>>> with mock_import():
...     import no_such_module  # Won't raise ImportError
...     no_such_module.no_such_function()  # Won't raise AttributeError

Mocking import as a decorator:

>>> @mock_import()
... def method():
...     import no_such_module  # Won't raise ImportError
...     no_such_module.no_such_function()  # Won't raise AttributeError

>>>     import no_such_module  # raises ImportError

Making an exception:

>>> with mock_import(do_not_mock='no_such_module'):
...     import no_such_other_module  # Won't raise ImportError
...     import no_such_module  # Will raise ImportError

>>> with mock_import(do_not_mock=['nsm1', 'nsm2']):
...     import nsm  # Won't raise ImportError
...     import nsm1  # Will raise ImportError
...     import nsm2  # Will raise ImportError