Remove test from setup.py, unify test requirements

setup.py

@@ -18,34 +18,24 @@
 # You should have received a copy of the GNU Lesser General Public License
 # along with pygal. If not, see <http://www.gnu.org/licenses/>.
 import os
-import sys
 
 from setuptools import find_packages, setup
-from setuptools.command.test import test as TestCommand
-
-
-class PyTest(TestCommand):
-    def finalize_options(self):
-        TestCommand.finalize_options(self)
-        self.test_args = ['-x', 'build/lib/pygal']
-        self.test_suite = True
-
-    def run_tests(self):
-        # import here, cause outside the eggs aren't loaded
-        import pytest
-        errno = pytest.main(self.test_args)
-        sys.exit(errno)
-
 
 ROOT = os.path.dirname(__file__)
 
 
 tests_requirements = [
-    "pyquery", "flask", 'cairosvg', 'lxml', 'pygal_maps_world', 'pygal_maps_fr',
-    'pygal_maps_ch', 'coveralls',
-    'ruff',
-    'pytest-runner', 'pytest-cov',
-    'pytest'
+    "cairosvg",
+    "coveralls",
+    "flask",
+    "lxml",
+    "pygal_maps_ch",
+    "pygal_maps_fr",
+    "pygal_maps_world",
+    "pyquery",
+    "pytest"
+    "pytest-cov",
+    "ruff",
 ]
 
 about = {}
@@ -72,7 +62,6 @@ def run_tests(self):
         "svg", "chart", "graph", "diagram", "plot", "histogram", "kiviat"],
     setup_requires=['pytest-runner'],
     install_requires=['importlib-metadata'],  # TODO: remove this (see #545, #546)
-    cmdclass={'test': PyTest},
     package_data={'pygal': ['css/*', 'graph/maps/*.svg']},
     extras_require={
         'lxml': ['lxml'],

tox.ini

@@ -2,13 +2,7 @@
 envlist = py38,py39,py310,py311,py312,pypy
 
 [testenv]
-deps =
-     pytest
-     coverage
-     lxml
-     pyquery
-     cairosvg
-
+extras = test
 setenv =
     COVERAGE_FILE=.cov-{envname}
 commands =