Cleanup test environment and requirements

- pytest: verbose isn't needed but show skipped tests
- mock is not needed anymore. it is part of stdlib
- Unpin Sphinx and fix warning about lexer
- Mirror tox command for doc build in tasks.py

pelican/tests/test_generators.py

@@ -2,6 +2,7 @@ import locale
 import os
 from shutil import copy, rmtree
 from tempfile import mkdtemp
+from unittest.mock import MagicMock
 
 from pelican.generators import (ArticlesGenerator, Generator, PagesGenerator,
                                 PelicanTemplateNotFound, StaticGenerator,
@@ -9,14 +10,6 @@ from pelican.generators import (ArticlesGenerator, Generator, PagesGenerator,
 from pelican.tests.support import get_context, get_settings, unittest
 from pelican.writers import Writer
 
-try:
-    from unittest.mock import MagicMock
-except ImportError:
-    try:
-        from mock import MagicMock
-    except ImportError:
-        MagicMock = False
-
 
 CUR_DIR = os.path.dirname(__file__)
 CONTENT_DIR = os.path.join(CUR_DIR, 'content')
@@ -198,7 +191,6 @@ class TestArticlesGenerator(unittest.TestCase):
         return [[article.title, article.status, article.category.name,
                  article.template] for article in articles]
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_generate_feeds(self):
         settings = get_settings()
         settings['CACHE_PATH'] = self.temp_cache
@@ -218,7 +210,6 @@ class TestArticlesGenerator(unittest.TestCase):
         generator.generate_feeds(writer)
         self.assertFalse(writer.write_feed.called)
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_generate_feeds_override_url(self):
         settings = get_settings()
         settings['CACHE_PATH'] = self.temp_cache
@@ -334,7 +325,6 @@ class TestArticlesGenerator(unittest.TestCase):
         categories_expected = ['default', 'yeah', 'test', 'zhi-dao-shu']
         self.assertEqual(sorted(categories), sorted(categories_expected))
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_direct_templates_save_as_url_default(self):
 
         settings = get_settings()
@@ -352,7 +342,6 @@ class TestArticlesGenerator(unittest.TestCase):
                                  template_name='archives',
                                  page_name='archives', url="archives.html")
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_direct_templates_save_as_url_modified(self):
 
         settings = get_settings()
@@ -373,7 +362,6 @@ class TestArticlesGenerator(unittest.TestCase):
                                  page_name='archives/index',
                                  url="archives/")
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_direct_templates_save_as_false(self):
 
         settings = get_settings()
@@ -398,7 +386,6 @@ class TestArticlesGenerator(unittest.TestCase):
         self.assertIn(custom_template, self.articles)
         self.assertIn(standard_template, self.articles)
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_period_in_timeperiod_archive(self):
         """
         Test that the context of a generated period_archive is passed
@@ -1022,7 +1009,6 @@ class TestStaticGenerator(unittest.TestCase):
         with open(self.endfile) as f:
             self.assertEqual(f.read(), "staticcontent")
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_file_update_required_when_dest_does_not_exist(self):
         staticfile = MagicMock()
         staticfile.source_path = self.startfile
@@ -1032,7 +1018,6 @@ class TestStaticGenerator(unittest.TestCase):
         update_required = self.generator._file_update_required(staticfile)
         self.assertTrue(update_required)
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_dest_and_source_mtimes_are_equal(self):
         staticfile = MagicMock()
         staticfile.source_path = self.startfile
@@ -1045,7 +1030,6 @@ class TestStaticGenerator(unittest.TestCase):
         isnewer = self.generator._source_is_newer(staticfile)
         self.assertFalse(isnewer)
 
-    @unittest.skipUnless(MagicMock, 'Needs Mock module')
     def test_source_is_newer(self):
         staticfile = MagicMock()
         staticfile.source_path = self.startfile