Black linting

Makefile

@@ -1,4 +1,4 @@
-.PHONY: clean clean-build clean-pyc clean-test
+.PHONY: clean clean-build clean-pyc clean-test lint
 
 clean: clean-build clean-pyc clean-test ## remove all build, test, coverage and Python artifacts
 
@@ -19,3 +19,7 @@ clean-test: ## remove test and coverage artifacts
 	rm -fr .tox/
 	rm -f .coverage
 	rm -fr htmlcov/
+
+lint: ## check style with flake8
+	flake8 pytest_asyncio tests
+	black --check --verbose pytest_asyncio tests

README.rst

@@ -10,6 +10,8 @@ pytest-asyncio: pytest support for asyncio
 .. image:: https://img.shields.io/pypi/pyversions/pytest-asyncio.svg
     :target: https://github.com/pytest-dev/pytest-asyncio
     :alt: Supported Python versions
+.. image:: https://img.shields.io/badge/code%20style-black-000000.svg
+    :target: https://github.com/ambv/black
 
 pytest-asyncio is an Apache2 licensed library, written in Python, for testing
 asyncio code with pytest.

pytest_asyncio/plugin.py

@@ -62,7 +62,7 @@ def __init__(self, fixturedef):
 
     def add(self, name):
         """Add fixture name to fixturedef
-         and record in to_strip list (If not previously included)"""
+        and record in to_strip list (If not previously included)"""
         if name in self.fixturedef.argnames:
             return
         self.fixturedef.argnames += (name,)

setup.cfg

@@ -12,3 +12,6 @@ filterwarnings = error
 [metadata]
 # ensure LICENSE is included in wheel metadata
 license_file = LICENSE
+
+[flake8]
+ignore = E203, E501, W503

tests/async_fixtures/test_async_fixtures_scope.py

@@ -3,16 +3,17 @@
 module-scoped too.
 """
 import asyncio
+
 import pytest
 
 
-@pytest.fixture(scope='module')
+@pytest.fixture(scope="module")
 def event_loop():
     """A module-scoped event loop."""
     return asyncio.new_event_loop()
 
 
-@pytest.fixture(scope='module')
+@pytest.fixture(scope="module")
 async def async_fixture():
     await asyncio.sleep(0.1)
     return 1

tests/async_fixtures/test_async_fixtures_with_finalizer.py

@@ -1,5 +1,6 @@
 import asyncio
 import functools
+
 import pytest
 
 
@@ -8,11 +9,13 @@ async def test_module_with_event_loop_finalizer(port_with_event_loop_finalizer):
     await asyncio.sleep(0.01)
     assert port_with_event_loop_finalizer
 
+
 @pytest.mark.asyncio
 async def test_module_with_get_event_loop_finalizer(port_with_get_event_loop_finalizer):
     await asyncio.sleep(0.01)
     assert port_with_get_event_loop_finalizer
 
+
 @pytest.fixture(scope="module")
 def event_loop():
     """Change event_loop fixture to module level."""
@@ -29,6 +32,7 @@ async def port_afinalizer():
             # await task using loop provided by event_loop fixture
             # RuntimeError is raised if task is created on a different loop
             await finalizer
+
         event_loop.run_until_complete(port_afinalizer())
 
     worker = asyncio.ensure_future(asyncio.sleep(0.2))
@@ -43,6 +47,7 @@ async def port_afinalizer():
             # await task using loop provided by asyncio.get_event_loop()
             # RuntimeError is raised if task is created on a different loop
             await finalizer
+
         asyncio.get_event_loop().run_until_complete(port_afinalizer())
 
     worker = asyncio.ensure_future(asyncio.sleep(0.2))

tests/async_fixtures/test_async_gen_fixtures.py

@@ -1,4 +1,3 @@
-import asyncio
 import unittest.mock
 
 import pytest
@@ -8,7 +7,7 @@
 RETVAL = object()
 
 
-@pytest.fixture(scope='module')
+@pytest.fixture(scope="module")
 def mock():
     return unittest.mock.Mock(return_value=RETVAL)
 

tests/async_fixtures/test_coroutine_fixtures.py

@@ -7,7 +7,9 @@
 END = object()
 RETVAL = object()
 
-pytestmark = pytest.mark.skip(reason='@asyncio.coroutine fixtures are not supported yet')
+pytestmark = pytest.mark.skip(
+    reason="@asyncio.coroutine fixtures are not supported yet"
+)
 
 
 @pytest.fixture

tests/async_fixtures/test_nested.py

@@ -1,25 +1,26 @@
 import asyncio
+
 import pytest
 
 
 @pytest.fixture()
 async def async_inner_fixture():
     await asyncio.sleep(0.01)
-    print('inner start')
+    print("inner start")
     yield True
-    print('inner stop')
+    print("inner stop")
 
 
 @pytest.fixture()
 async def async_fixture_outer(async_inner_fixture, event_loop):
     await asyncio.sleep(0.01)
-    print('outer start')
+    print("outer start")
     assert async_inner_fixture is True
     yield True
-    print('outer stop')
+    print("outer stop")
 
 
 @pytest.mark.asyncio
 async def test_async_fixture(async_fixture_outer):
     assert async_fixture_outer is True
-    print('test_async_fixture')
+    print("test_async_fixture")

tests/conftest.py

@@ -22,8 +22,9 @@ async def just_a_sleep():
     assert counter == 2
 
 
-@pytest.fixture(scope='session', name='factory_involving_factories')
+@pytest.fixture(scope="session", name="factory_involving_factories")
 def factory_involving_factories_fixture(unused_tcp_port_factory):
     def factory():
         return unused_tcp_port_factory()
+
     return factory

tests/markers/test_class_marker.py

@@ -1,5 +1,6 @@
 """Test if pytestmark works when defined on a class."""
 import asyncio
+
 import pytest
 
 
@@ -14,6 +15,7 @@ async def inc():
             nonlocal counter
             counter += 1
             await asyncio.sleep(0)
+
         await asyncio.ensure_future(inc())
         assert counter == 2
 

tests/markers/test_module_marker.py

@@ -24,10 +24,12 @@ async def inc():
 async def test_is_asyncio(event_loop, sample_fixture):
     assert asyncio.get_event_loop()
     counter = 1
+
     async def inc():
         nonlocal counter
         counter += 1
         await asyncio.sleep(0)
+
     await asyncio.ensure_future(inc())
     assert counter == 2
 

tests/multiloop/conftest.py

@@ -5,6 +5,7 @@
 
 class CustomSelectorLoop(asyncio.SelectorEventLoop):
     """A subclass with no overrides, just to test for presence."""
+
     pass
 
 

tests/test_simple.py

@@ -1,20 +1,20 @@
 """Quick'n'dirty unit tests for provided fixtures and markers."""
 import asyncio
-import pytest
 
+import pytest
 import pytest_asyncio.plugin
 
 
 async def async_coro():
     await asyncio.sleep(0)
-    return 'ok'
+    return "ok"
 
 
 def test_event_loop_fixture(event_loop):
     """Test the injection of the event_loop fixture."""
     assert event_loop
     ret = event_loop.run_until_complete(async_coro())
-    assert ret == 'ok'
+    assert ret == "ok"
 
 
 @pytest.mark.asyncio
@@ -23,7 +23,7 @@ async def test_asyncio_marker():
     await asyncio.sleep(0)
 
 
-@pytest.mark.xfail(reason='need a failure', strict=True)
+@pytest.mark.xfail(reason="need a failure", strict=True)
 @pytest.mark.asyncio
 def test_asyncio_marker_fail():
     assert False
@@ -42,12 +42,10 @@ async def test_unused_port_fixture(unused_tcp_port, event_loop):
     async def closer(_, writer):
         writer.close()
 
-    server1 = await asyncio.start_server(closer, host='localhost',
-                                         port=unused_tcp_port)
+    server1 = await asyncio.start_server(closer, host="localhost", port=unused_tcp_port)
 
     with pytest.raises(IOError):
-        await asyncio.start_server(closer, host='localhost',
-                                   port=unused_tcp_port)
+        await asyncio.start_server(closer, host="localhost", port=unused_tcp_port)
 
     server1.close()
     await server1.wait_closed()
@@ -60,20 +58,19 @@ async def test_unused_port_factory_fixture(unused_tcp_port_factory, event_loop):
     async def closer(_, writer):
         writer.close()
 
-    port1, port2, port3 = (unused_tcp_port_factory(), unused_tcp_port_factory(),
-                           unused_tcp_port_factory())
+    port1, port2, port3 = (
+        unused_tcp_port_factory(),
+        unused_tcp_port_factory(),
+        unused_tcp_port_factory(),
+    )
 
-    server1 = await asyncio.start_server(closer, host='localhost',
-                                         port=port1)
-    server2 = await asyncio.start_server(closer, host='localhost',
-                                         port=port2)
-    server3 = await asyncio.start_server(closer, host='localhost',
-                                         port=port3)
+    server1 = await asyncio.start_server(closer, host="localhost", port=port1)
+    server2 = await asyncio.start_server(closer, host="localhost", port=port2)
+    server3 = await asyncio.start_server(closer, host="localhost", port=port3)
 
     for port in port1, port2, port3:
         with pytest.raises(IOError):
-            await asyncio.start_server(closer, host='localhost',
-                                       port=port)
+            await asyncio.start_server(closer, host="localhost", port=port)
 
     server1.close()
     await server1.wait_closed()
@@ -96,8 +93,7 @@ def mock_unused_tcp_port():
         else:
             return 10000 + counter
 
-    monkeypatch.setattr(pytest_asyncio.plugin, '_unused_tcp_port',
-                        mock_unused_tcp_port)
+    monkeypatch.setattr(pytest_asyncio.plugin, "_unused_tcp_port", mock_unused_tcp_port)
 
     assert unused_tcp_port_factory() == 10000
     assert unused_tcp_port_factory() > 10000
@@ -110,7 +106,7 @@ class Test:
     async def test_asyncio_marker_method(self, event_loop):
         """Test the asyncio pytest marker in a Test class."""
         ret = await async_coro()
-        assert ret == 'ok'
+        assert ret == "ok"
 
 
 class TestUnexistingLoop:
@@ -125,7 +121,7 @@ def remove_loop(self):
     async def test_asyncio_marker_without_loop(self, remove_loop):
         """Test the asyncio pytest marker in a Test class."""
         ret = await async_coro()
-        assert ret == 'ok'
+        assert ret == "ok"
 
 
 class TestEventLoopStartedBeforeFixtures:
@@ -150,12 +146,11 @@ async def test_event_loop_before_fixture(self, event_loop, loop):
         assert await loop.run_in_executor(None, self.foo) == 1
 
 
-
 @pytest.mark.asyncio
 async def test_no_warning_on_skip():
     pytest.skip("Test a skip error inside asyncio")
 
 
 def test_async_close_loop(event_loop):
     event_loop.close()
-    return 'ok'
+    return "ok"

tests/test_subprocess.py

@@ -1,12 +1,11 @@
 """Tests for using subprocesses in tests."""
-import sys
 import asyncio
 import asyncio.subprocess
+import sys
 
 import pytest
 
-
-if sys.platform == 'win32':
+if sys.platform == "win32":
     # The default asyncio event loop implementation on Windows does not
     # support subprocesses. Subprocesses are available for Windows if a
     # ProactorEventLoop is used.
@@ -21,13 +20,15 @@ def event_loop():
 async def test_subprocess(event_loop):
     """Starting a subprocess should be possible."""
     proc = await asyncio.subprocess.create_subprocess_exec(
-        sys.executable, '--version', stdout=asyncio.subprocess.PIPE)
+        sys.executable, "--version", stdout=asyncio.subprocess.PIPE
+    )
     await proc.communicate()
 
 
 @pytest.mark.asyncio(forbid_global_loop=True)
 async def test_subprocess_forbid(event_loop):
     """Starting a subprocess should be possible."""
     proc = await asyncio.subprocess.create_subprocess_exec(
-        sys.executable, '--version', stdout=asyncio.subprocess.PIPE)
+        sys.executable, "--version", stdout=asyncio.subprocess.PIPE
+    )
     await proc.communicate()

tox.ini

@@ -7,6 +7,16 @@ skip_missing_interpreters = true
 extras = testing
 commands = coverage run -m pytest {posargs}
 
+[testenv:lint]
+skip_install = true
+basepython = python3.9
+extras = tests
+deps =
+    flake8
+    black
+commands =
+    make lint
+
 [testenv:coverage-report]
 deps = coverage
 skip_install = true