hbutils.testing.isolated

Overview:

Utilities for isolating environment, which can be using in testing.

isolated_directory

hbutils.testing.isolated.isolated_directory(mapping: Optional[Dict[str, str]] = None) → AbstractContextManager

Overview:

Do something in an isolated directory.

Parameters:

mapping – Mappings for the isolated directory.

Examples::

• Simple usage

>>> import os
>>> import pathlib
>>> from hbutils.testing import isolated_directory
>>>
>>> with isolated_directory():
...     with open('file.txt', 'w') as f:
...         print("Line 1", file=f)
...         print("Line 2rd", file=f)
...     print(os.listdir('.'))
...     print(pathlib.Path('file.txt').read_text())
['file.txt']
Line 1
Line 2rd
>>> print(os.listdir('.'))
['hbutils', 'README.md', 'requirements.txt', ...]

• Mapping files and directory inside

>>> import os
>>> from hbutils.testing import isolated_directory
>>>
>>> with isolated_directory({
...     'ts': 'hbutils/testing',
...     'README.md': 'README.md',
... }):
...     print(os.listdir('.'))
...     print(os.listdir('ts'))
['README.md', 'ts']
['capture', 'generator', 'isolated', '__init__.py']

isolated_stdin

hbutils.testing.isolated.isolated_stdin(v: Union[str, List[str]], mem: bool = False)

Overview:

Isolation for stdin stream.

Parameters:

• v – Input content, a whole string or a list of string supported.

• mem – Use memory or not. Default is False which means a temporary file will be used as fake input stream.

Examples::

>>> from hbutils.testing import isolated_stdin
>>> with isolated_stdin(['123', '456']):
...     a = int(input())
...     b = int(input())
...     print(a, b, a + b)
123 456 579