[feat] Deprecates the optional scope keyword argument of asyncio ma…

…rkers. Users are encouraged to use the `loop_scope` keyword argument. The `loop_scope` kwarg does exactly the same, though its naming is consistent with the `loop_scope` kwarg of ``pytest_asyncio.fixture``.

Signed-off-by: Michael Seifert <m.seifert@digitalernachschub.de>

docs/source/concepts_module_scope_example.py

@@ -5,13 +5,13 @@
 loop: asyncio.AbstractEventLoop
 
 
-@pytest.mark.asyncio(scope="module")
+@pytest.mark.asyncio(loop_scope="module")
 async def test_remember_loop():
     global loop
     loop = asyncio.get_running_loop()
 
 
-@pytest.mark.asyncio(scope="module")
+@pytest.mark.asyncio(loop_scope="module")
 async def test_runs_in_a_loop():
     global loop
     assert asyncio.get_running_loop() is loop

docs/source/how-to-guides/class_scoped_loop_example.py

@@ -3,7 +3,7 @@
 import pytest
 
 
-@pytest.mark.asyncio(scope="class")
+@pytest.mark.asyncio(loop_scope="class")
 class TestInOneEventLoopPerClass:
     loop: asyncio.AbstractEventLoop
 

docs/source/how-to-guides/module_scoped_loop_example.py

@@ -2,7 +2,7 @@
 
 import pytest
 
-pytestmark = pytest.mark.asyncio(scope="module")
+pytestmark = pytest.mark.asyncio(loop_scope="module")
 
 loop: asyncio.AbstractEventLoop
 

docs/source/how-to-guides/package_scoped_loop_example.py

@@ -1,3 +1,3 @@
 import pytest
 
-pytestmark = pytest.mark.asyncio(scope="package")
+pytestmark = pytest.mark.asyncio(loop_scope="package")

docs/source/how-to-guides/run_class_tests_in_same_loop.rst

@@ -1,7 +1,7 @@
 ======================================================
 How to run all tests in a class in the same event loop
 ======================================================
-All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(scope="class")``.
+All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(loop_scope="class")``.
 This is easily achieved by using the *asyncio* marker as a class decorator.
 
 .. include:: class_scoped_loop_example.py

docs/source/how-to-guides/run_module_tests_in_same_loop.rst

@@ -1,7 +1,7 @@
 =======================================================
 How to run all tests in a module in the same event loop
 =======================================================
-All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(scope="module")``.
+All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(loop_scope="module")``.
 This is easily achieved by adding a `pytestmark` statement to your module.
 
 .. include:: module_scoped_loop_example.py

docs/source/how-to-guides/run_package_tests_in_same_loop.rst

@@ -1,7 +1,7 @@
 ========================================================
 How to run all tests in a package in the same event loop
 ========================================================
-All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(scope="package")``.
+All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(loop_scope="package")``.
 Add the following code to the ``__init__.py`` of the test package:
 
 .. include:: package_scoped_loop_example.py

docs/source/how-to-guides/run_session_tests_in_same_loop.rst

@@ -1,7 +1,7 @@
 ==========================================================
 How to run all tests in the session in the same event loop
 ==========================================================
-All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(scope="session")``.
+All tests can be run inside the same event loop by marking them with ``pytest.mark.asyncio(loop_scope="session")``.
 The easiest way to mark all tests is via a ``pytest_collection_modifyitems`` hook in the ``conftest.py`` at the root folder of your test suite.
 
 .. include:: session_scoped_loop_example.py

docs/source/how-to-guides/session_scoped_loop_example.py

@@ -5,6 +5,6 @@
 
 def pytest_collection_modifyitems(items):
     pytest_asyncio_tests = (item for item in items if is_async_test(item))
-    session_scope_marker = pytest.mark.asyncio(scope="session")
+    session_scope_marker = pytest.mark.asyncio(loop_scope="session")
     for async_test in pytest_asyncio_tests:
         async_test.add_marker(session_scope_marker, append=False)

docs/source/reference/changelog.rst

@@ -2,6 +2,10 @@
 Changelog
 =========
 
+0.24.0 (UNRELEASED)
+===================
+- Deprecates the optional `scope` keyword argument of asyncio markers. Users are encouraged to use the `loop_scope` keyword argument. The `loop_scope` kwarg does exactly the same, though its naming is consistent with the `loop_scope` kwarg of ``pytest_asyncio.fixture``.
+
 0.23.8 (UNRELEASED)
 ===================
 - Fixes a bug that caused duplicate markers in async tests `#813 <https://github.com/pytest-dev/pytest-asyncio/issues/813>`_

docs/source/reference/fixtures/event_loop_policy_example.py

@@ -12,6 +12,6 @@ def event_loop_policy(request):
     return CustomEventLoopPolicy()
 
 
-@pytest.mark.asyncio(scope="module")
+@pytest.mark.asyncio(loop_scope="module")
 async def test_uses_custom_event_loop_policy():
     assert isinstance(asyncio.get_event_loop_policy(), CustomEventLoopPolicy)

docs/source/reference/markers/class_scoped_loop_strict_mode_example.py

@@ -3,7 +3,7 @@
 import pytest
 
 
-@pytest.mark.asyncio(scope="class")
+@pytest.mark.asyncio(loop_scope="class")
 class TestClassScopedLoop:
     loop: asyncio.AbstractEventLoop
 

docs/source/reference/markers/class_scoped_loop_with_fixture_strict_mode_example.py

@@ -5,7 +5,7 @@
 import pytest_asyncio
 
 
-@pytest.mark.asyncio(scope="class")
+@pytest.mark.asyncio(loop_scope="class")
 class TestClassScopedLoop:
     loop: asyncio.AbstractEventLoop
 

docs/source/reference/markers/module_scoped_loop_strict_mode_example.py

@@ -2,7 +2,7 @@
 
 import pytest
 
-pytestmark = pytest.mark.asyncio(scope="module")
+pytestmark = pytest.mark.asyncio(loop_scope="module")
 
 loop: asyncio.AbstractEventLoop
 

pytest_asyncio/plugin.py

@@ -995,11 +995,18 @@ def pytest_runtest_setup(item: pytest.Item) -> None:
 but it should only use "loop_scope".
 """
 
+_MARKER_SCOPE_KWARG_DEPRECATION_WARNING = """\
+The "scope" keyword argument to the asyncio marker has been deprecated. \
+Please use the "loop_scope" argument instead.
+"""
+
 
 def _get_marked_loop_scope(asyncio_marker: Mark) -> _ScopeName:
     assert asyncio_marker.name == "asyncio"
-    if "scope" in asyncio_marker.kwargs and "loop_scope" in asyncio_marker.kwargs:
-        raise pytest.UsageError(_DUPLICATE_LOOP_SCOPE_DEFINITION_ERROR)
+    if "scope" in asyncio_marker.kwargs:
+        if "loop_scope" in asyncio_marker.kwargs:
+            raise pytest.UsageError(_DUPLICATE_LOOP_SCOPE_DEFINITION_ERROR)
+        warnings.warn(PytestDeprecationWarning(_MARKER_SCOPE_KWARG_DEPRECATION_WARNING))
     scope = asyncio_marker.kwargs.get("loop_scope") or asyncio_marker.kwargs.get(
         "scope", "function"
     )

tests/async_fixtures/test_async_fixtures_with_finalizer.py

@@ -4,13 +4,13 @@
 import pytest
 
 
-@pytest.mark.asyncio(scope="module")
+@pytest.mark.asyncio(loop_scope="module")
 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(scope="module")
+@pytest.mark.asyncio(loop_scope="module")
 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

tests/markers/test_class_scope.py

@@ -39,11 +39,11 @@ def test_asyncio_mark_provides_class_scoped_loop_when_applied_to_functions(
             class TestClassScopedLoop:
                 loop: asyncio.AbstractEventLoop
 
-                @pytest.mark.asyncio(scope="class")
+                @pytest.mark.asyncio(loop_scope="class")
                 async def test_remember_loop(self):
                     TestClassScopedLoop.loop = asyncio.get_running_loop()
 
-                @pytest.mark.asyncio(scope="class")
+                @pytest.mark.asyncio(loop_scope="class")
                 async def test_this_runs_in_same_loop(self):
                     assert asyncio.get_running_loop() is TestClassScopedLoop.loop
             """
@@ -62,7 +62,7 @@ def test_asyncio_mark_provides_class_scoped_loop_when_applied_to_class(
             import asyncio
             import pytest
 
-            @pytest.mark.asyncio(scope="class")
+            @pytest.mark.asyncio(loop_scope="class")
             class TestClassScopedLoop:
                 loop: asyncio.AbstractEventLoop
 
@@ -87,7 +87,7 @@ def test_asyncio_mark_raises_when_class_scoped_is_request_without_class(
             import asyncio
             import pytest
 
-            @pytest.mark.asyncio(scope="class")
+            @pytest.mark.asyncio(loop_scope="class")
             async def test_has_no_surrounding_class():
                 pass
             """
@@ -107,7 +107,7 @@ def test_asyncio_mark_is_inherited_to_subclasses(pytester: pytest.Pytester):
             import asyncio
             import pytest
 
-            @pytest.mark.asyncio(scope="class")
+            @pytest.mark.asyncio(loop_scope="class")
             class TestSuperClassWithMark:
                 pass
 
@@ -183,7 +183,7 @@ def test_asyncio_mark_respects_parametrized_loop_policies(
             def event_loop_policy(request):
                 return request.param
 
-            @pytest.mark.asyncio(scope="class")
+            @pytest.mark.asyncio(loop_scope="class")
             class TestWithDifferentLoopPolicies:
                 async def test_parametrized_loop(self, request):
                     pass
@@ -205,7 +205,7 @@ def test_asyncio_mark_provides_class_scoped_loop_to_fixtures(
             import pytest
             import pytest_asyncio
 
-            @pytest.mark.asyncio(scope="class")
+            @pytest.mark.asyncio(loop_scope="class")
             class TestClassScopedLoop:
                 loop: asyncio.AbstractEventLoop
 
@@ -242,7 +242,7 @@ async def async_fixture(self):
                     global loop
                     loop = asyncio.get_running_loop()
 
-                @pytest.mark.asyncio(scope="function")
+                @pytest.mark.asyncio(loop_scope="function")
                 async def test_runs_in_different_loop_as_fixture(self, async_fixture):
                     global loop
                     assert asyncio.get_running_loop() is not loop
@@ -277,7 +277,7 @@ def sets_event_loop_to_none(self):
                     return asyncio.run(asyncio.sleep(0))
                     # asyncio.run() sets the current event loop to None when finished
 
-                @pytest.mark.asyncio(scope="class")
+                @pytest.mark.asyncio(loop_scope="class")
                 # parametrization may impact fixture ordering
                 @pytest.mark.parametrize("n", (0, 1))
                 async def test_does_not_fail(self, sets_event_loop_to_none, n):
@@ -297,7 +297,7 @@ def test_standalone_test_does_not_trigger_warning_about_no_current_event_loop_be
             """\
             import pytest
 
-            @pytest.mark.asyncio(scope="class")
+            @pytest.mark.asyncio(loop_scope="class")
             class TestClass:
                 async def test_anything(self):
                     pass

tests/markers/test_function_scope.py

@@ -69,6 +69,23 @@ async def test_raises():
     result.assert_outcomes(errors=1)
 
 
+def test_warns_when_scope_argument_is_present(pytester: Pytester):
+    pytester.makepyfile(
+        dedent(
+            """\
+            import pytest
+
+            @pytest.mark.asyncio(scope="function")
+            async def test_warns():
+                ...
+            """
+        )
+    )
+    result = pytester.runpytest_subprocess("--asyncio-mode=strict")
+    result.assert_outcomes(passed=1, warnings=2)
+    result.stdout.fnmatch_lines("*DeprecationWarning*")
+
+
 def test_function_scope_supports_explicit_event_loop_fixture_request(
     pytester: Pytester,
 ):

tests/markers/test_module_scope.py

@@ -62,7 +62,7 @@ def test_asyncio_mark_provides_module_scoped_loop_strict_mode(pytester: Pytester
             import asyncio
             import pytest
 
-            pytestmark = pytest.mark.asyncio(scope="module")
+            pytestmark = pytest.mark.asyncio(loop_scope="module")
 
             loop: asyncio.AbstractEventLoop
 
@@ -94,7 +94,7 @@ def test_raise_when_event_loop_fixture_is_requested_in_addition_to_scoped_loop(
             import asyncio
             import pytest
 
-            pytestmark = pytest.mark.asyncio(scope="module")
+            pytestmark = pytest.mark.asyncio(loop_scope="module")
 
             async def test_remember_loop(event_loop):
                 pass
@@ -126,7 +126,7 @@ class CustomEventLoopPolicy(asyncio.DefaultEventLoopPolicy):
 
             from .custom_policy import CustomEventLoopPolicy
 
-            pytestmark = pytest.mark.asyncio(scope="module")
+            pytestmark = pytest.mark.asyncio(loop_scope="module")
 
             @pytest.fixture(scope="module")
             def event_loop_policy():
@@ -146,7 +146,7 @@ async def test_uses_custom_event_loop_policy():
 
             from .custom_policy import CustomEventLoopPolicy
 
-            pytestmark = pytest.mark.asyncio(scope="module")
+            pytestmark = pytest.mark.asyncio(loop_scope="module")
 
             async def test_does_not_use_custom_event_loop_policy():
                 assert not isinstance(
@@ -170,7 +170,7 @@ def test_asyncio_mark_respects_parametrized_loop_policies(
 
             import pytest
 
-            pytestmark = pytest.mark.asyncio(scope="module")
+            pytestmark = pytest.mark.asyncio(loop_scope="module")
 
             @pytest.fixture(
                 scope="module",
@@ -202,7 +202,7 @@ def test_asyncio_mark_provides_module_scoped_loop_to_fixtures(
             import pytest
             import pytest_asyncio
 
-            pytestmark = pytest.mark.asyncio(scope="module")
+            pytestmark = pytest.mark.asyncio(loop_scope="module")
 
             loop: asyncio.AbstractEventLoop
 
@@ -239,7 +239,7 @@ async def async_fixture():
                 global loop
                 loop = asyncio.get_running_loop()
 
-            @pytest.mark.asyncio(scope="class")
+            @pytest.mark.asyncio(loop_scope="class")
             class TestMixedScopes:
                 async def test_runs_in_different_loop_as_fixture(self, async_fixture):
                     global loop
@@ -271,7 +271,7 @@ async def async_fixture():
                 global loop
                 loop = asyncio.get_running_loop()
 
-            @pytest.mark.asyncio(scope="function")
+            @pytest.mark.asyncio(loop_scope="function")
             async def test_runs_in_different_loop_as_fixture(async_fixture):
                 global loop
                 assert asyncio.get_running_loop() is not loop
@@ -301,7 +301,7 @@ async def async_fixture():
                 loop = asyncio.get_running_loop()
                 yield
 
-            @pytest.mark.asyncio(scope="function")
+            @pytest.mark.asyncio(loop_scope="function")
             async def test_runs_in_different_loop_as_fixture(async_fixture):
                 global loop
                 assert asyncio.get_running_loop() is not loop
@@ -334,7 +334,7 @@ def sets_event_loop_to_none():
                 return asyncio.run(asyncio.sleep(0))
                 # asyncio.run() sets the current event loop to None when finished
 
-            @pytest.mark.asyncio(scope="module")
+            @pytest.mark.asyncio(loop_scope="module")
             # parametrization may impact fixture ordering
             @pytest.mark.parametrize("n", (0, 1))
             async def test_does_not_fail(sets_event_loop_to_none, n):
@@ -354,7 +354,7 @@ def test_standalone_test_does_not_trigger_warning_about_no_current_event_loop_be
             """\
             import pytest
 
-            @pytest.mark.asyncio(scope="module")
+            @pytest.mark.asyncio(loop_scope="module")
             async def test_anything():
                 pass
             """