Files
textual/tests/test_features.py
TomJGooding 7a9d32fdbf test: make tests async to fix failures on Python 3.9
After upgrading `pytest-asyncio` to the latest version, lots of tests
started failing in CI only on Python 3.9:

`RuntimeError: There is no current event loop in thread 'MainThread'`

Apparently these tests may have only been passing previously due to
issues in earlier versions of `pytest-asyncio`. Changing these tests to
async seems to fix the failures on Python 3.9.

Related issue:
https://github.com/pytest-dev/pytest-asyncio/issues/1039
2025-09-17 13:38:05 +01:00

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Python

from __future__ import annotations
from textual.app import App
async def test_textual_env_var(monkeypatch):
monkeypatch.setenv("TEXTUAL", "")
app = App()
assert app.features == set()
assert app.devtools is None
assert app.debug is False
monkeypatch.setenv("TEXTUAL", "devtools")
app = App()
assert app.features == {"devtools"}
assert app.devtools is not None
assert app.debug is False
monkeypatch.setenv("TEXTUAL", "devtools,debug")
app = App()
assert app.features == {"devtools", "debug"}
assert app.devtools is not None
assert app.debug is True
monkeypatch.setenv("TEXTUAL", "devtools, debug")
app = App()
assert app.features == {"devtools", "debug"}
assert app.devtools is not None
assert app.debug is True