Replace test setuptools command by unittest discover

tests/__init__.py

@@ -1,5 +0,0 @@
-# The COPYRIGHT file at the top level of this repository contains the full
-# copyright notices and license terms.
-from .test_party_zip import suite
-
-__all__ = ['suite']

tests/test_module.py

@@ -1,7 +1,7 @@
-# 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
+
+# This file is part of Tryton.  The COPYRIGHT file at the top level of
+# this repository contains the full copyright notices and license terms.
+
 from trytond.tests.test_tryton import ModuleTestCase, with_transaction
 from trytond.pool import Pool
 
@@ -86,8 +86,4 @@ class PartyZipTestCase(ModuleTestCase):
         self.assertEqual(address.subdivision.id, subdivision1.id)
 
 
-def suite():
-    suite = trytond.tests.test_tryton.suite()
-    suite.addTests(unittest.TestLoader().loadTestsFromTestCase(
-        PartyZipTestCase))
-    return suite
+del ModuleTestCase

tests/test_scenario.py

@@ -0,0 +1,23 @@
+
+# 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 doctest
+import glob
+import os
+
+from trytond.tests.test_tryton import doctest_checker, doctest_teardown
+
+
+def load_tests(loader, tests, pattern):
+    cwd = os.getcwd()
+    try:
+        os.chdir(os.path.dirname(__file__))
+        for scenario in glob.glob('*.rst'):
+            tests.addTests(doctest.DocFileSuite(
+                    scenario, tearDown=doctest_teardown, encoding='utf-8',
+                    checker=doctest_checker,
+                    optionflags=doctest.REPORT_ONLY_FIRST_FAILURE))
+    finally:
+        os.chdir(cwd)
+    return tests