Pytest Accept

pytest-accept

[](https://github.com/max-sixty/pytest-accept/actions?query=workflow:test) [](https://pypi.python.org/pypi/pytest-accept/) [](https://github.com/max-sixty/pytest-accept/blob/main/LICENSE)

pytest-accept is a pytest plugin for automatically updating outputs. It runs along with pytest, observes the generated outputs, and writes them to the test's documented outputs.

Before

def extract_functions(code):
    return re.findall(r"(\w+)\(", code)


def test_extract_functions():
    assert extract_functions("print('hi')") == ["print"]
    assert extract_functions("sum(map(f, x))") == ["sum"]

After `pytest --accept`

def test_extract_functions():
    assert extract_functions("print('hi')") == ["print"]
-   assert extract_functions("sum(map(f, x))") == ["sum"]
+   assert extract_functions("sum(map(f, x))") == ["sum", "map"]

pytest-accept is decoupled from the tests it works with — it can be used with existing tests, and the tests it edits are no different from normal tests. It works with both doctests and normal `assert` statements.

Installation

uv tool install -U pytest-accept

Or with pip:

pip install pytest-accept

To run, just pass `--accept` to pytest:

pytest --accept

Why?

• Often it's fairly easy to observe whether something is working by viewing the output it produces
• ...but often the output is verbose, and copying and pasting the output into the test is tedious
• pytest-accept does the copying & pasting for you
• Similarly, lots of folks generally find writing any tests a bit annoying, and prefer to develop by "running the code and