feat!: Removed support for Python 3.5.

This commit:
- Removes Python 3.5 from the tested environments in CI and tox
- Removes instructions specific to Python 3.5 from the README
- Updates the Changelog
- Removes the dependency on async_generator
- Removes instructions in conftest that skip certain test cases if the Python version is smaller than 3.6

Signed-off-by: Michael Seifert <[email protected]>

Author: seifertm

.travis.yml

@@ -2,8 +2,6 @@ language: python
 
 matrix:
   include:
-    - python: 3.5
-      env: TOX_ENV=py35
     - python: 3.6
       env: TOX_ENV=py36
     - python: 3.7

README.rst

@@ -127,19 +127,6 @@ to redefine the ``event_loop`` fixture to have the same or broader scope.
 Async fixtures need the event loop, and so must have the same or narrower scope
 than the ``event_loop`` fixture.
 
-If you want to do this with Python 3.5, the ``yield`` statement must be replaced with ``await yield_()`` and the coroutine
-function must be decorated with ``@async_generator``, like so:
-
-.. code-block:: python3
-
-    from async_generator import yield_, async_generator
-
-    @pytest.fixture
-    @async_generator
-    async def async_gen_fixture():
-        await asyncio.sleep(0.1)
-        await yield_('a value')
-
 
 Markers
 -------
@@ -178,6 +165,7 @@ Changelog
 0.15.0 (UNRELEASED)
 ~~~~~~~~~~~~~~~~~~~
 - Add support for Python 3.9
+- Abandon support for Python 3.5. If you still require support for Python 3.5, please use pytest-asyncio v0.14 or earlier.
 
 0.14.0 (2020-06-24)
 ~~~~~~~~~~~~~~~~~~~

pytest_asyncio/plugin.py

@@ -13,10 +13,7 @@ def transfer_markers(*args, **kwargs):  # noqa
         """Noop when over pytest 4.1.0"""
         pass
 
-try:
-    from async_generator import isasyncgenfunction
-except ImportError:
-    from inspect import isasyncgenfunction
+from inspect import isasyncgenfunction
 
 
 def _is_coroutine(obj):

setup.py

@@ -33,21 +33,18 @@ def find_version():
         "Development Status :: 4 - Beta",
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
-        "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",
         "Topic :: Software Development :: Testing",
         "Framework :: Pytest",
     ],
-    python_requires=">= 3.5",
+    python_requires=">= 3.6",
     install_requires=["pytest >= 5.4.0"],
     extras_require={
-        ':python_version == "3.5"': "async_generator >= 1.3",
         "testing": [
             "coverage",
-            "async_generator >= 1.3",
             "hypothesis >= 5.7.1",
         ],
     },

tests/async_fixtures/test_async_gen_fixtures_35.py

@@ -1,13 +1,7 @@
 import asyncio
-import sys
 
 import pytest
 
-collect_ignore = []
-if sys.version_info[:2] < (3, 6):
-    collect_ignore.append("async_fixtures/test_async_gen_fixtures_36.py")
-    collect_ignore.append("async_fixtures/test_nested_36.py")
-
 
 @pytest.fixture
 def dependent_fixture(event_loop):

tests/conftest.py

@@ -1,6 +1,6 @@
 [tox]
 minversion = 3.14.0
-envlist = py35, py36, py37, py38, py39
+envlist = py36, py37, py38, py39
 skip_missing_interpreters = true
 
 [testenv]