Replace test setuptools command by unittest discover

issue9215
review389851002

setup.py

@@ -142,6 +142,4 @@ setup(name=name,
     [trytond.modules]
     product_attribute = trytond.modules.product_attribute
     """,
-    test_suite='tests',
-    test_loader='trytond.test_loader:Loader',
     )

tests/__init__.py

@@ -1,10 +1,2 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-
-try:
-    from trytond.modules.product_attribute.tests.test_product_attribute import \
-        suite  # noqa: E501
-except ImportError:
-    from .test_product_attribute import suite
-
-__all__ = ['suite']

tests/test_module.py

@@ -1,8 +1,6 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-import unittest
 
-import trytond.tests.test_tryton
 from trytond.tests.test_tryton import ModuleTestCase
 
 
@@ -11,8 +9,4 @@ class ProductTestCase(ModuleTestCase):
     module = 'product_attribute'
 
 
-def suite():
-    suite = trytond.tests.test_tryton.suite()
-    suite.addTests(unittest.TestLoader().loadTestsFromTestCase(
-        ProductTestCase))
-    return suite
+del ModuleTestCase

tox.ini

@@ -3,7 +3,7 @@ envlist = {py37,py38,py39,py310}-{sqlite,postgresql}
 
 [testenv]
 commands =
-    coverage run --include=.*/product_attribute/* setup.py test
+    coverage run --include=.*/product_attribute/* -m unittest discover -s tests
     coverage report --include=.*/product_attribute/* --omit=*/tests/*
 deps =
     coverage