unittest recipes for temporary files and directories
Sometimes, tests need temporary files or directories. You can do this in Python’s unittest with the standard library tempfile module. Let’s look at some recipes to do so within individual tests and setUp().
People still use unitest instead of pytest fixtures? https://docs.pytest.org/en/6.2.x/tmpdir.html
This. We kinda stumbled on this pattern, and use it to great effect. Simplified code:
@pytest.fixture
def tmpfiles():
with NamedTemporaryFile(suffix=".html") as f:
yield f
# or for paths, which are more suitable for certain tests
# touch them so they exist
@pytest.fixture
def othertmppaths() -> list[Path]:
f1 = Path("...")
f1.touch()
f2 = Path("...")
f2.touch()
yield [f1, f2]
# you could delete them here if needed
f1.unlink()
def test_foo(othertmppaths list[Path]):
result = upload_resource(othertmppaths[0])
assert result.status == 200
The context manager one will properly clean up all files.
E: Pretty website btw
Often using pytest to debug code. When using a tmp_path, would prefer not to delete the file tree in the end.
When the test fails, can run the code against the folder tree
cd into the tmp folderUse both unittest and pytest. To get proficient in both.
Was initially thinking this article is going to turn out to be useless. Then it taught a useful trick that wasn't aware of.
Learning something new with unittest is unusual.
Besides showing off what a degenerate can accomplish.
I can run groupings or part of a grouping of unittest testcases in parallel. From a GUI. By typing ~6-10 keystrokes.
Just never got around to implementing this using pytest. And cuz of that, never published the GUI package.
Search algorithms matter
When humans read ^^ nothing registers in the brain. Could write it 1000x and would always fall on closed brains.
People would still go back to recommending their favorite File Managers (has no search algo) or managing their contacts within each social media platform. And infinite scroll new feeds.
Without thinking twice about it.