[tests] use pytest for doctest

- nosetest is not maintained any longer and fails with Python 3.10+.
  Use pytest instead for doctest.
- require pytest 7.0.1 or higher
- remove pytest filterwarnings because it was dropped in pytest 6.1.

Bug: T319164
Change-Id: I8e5d65c6784070c8a0376386dd45993fd245c207

dev-requirements.txt

@@ -1,7 +1,7 @@
 # This is a PIP 6+ requirements file for development dependencies
 #
 
-pytest >= 5.3
+pytest >= 7.0.1
 pytest-cov >= 3.0.0; python_version>="3.10"
 pytest-cov >= 2.11.1; python_version<"3.10"
 pytest-timeout

tox.ini

@@ -9,7 +9,10 @@ envlist =
     hacking-py37
 
 [params]
-doctest_skip = --ignore-files=(gui|memento)\.py
+# gui needs tkinter
+doctest_skip =
+    --ignore-glob="*gui.py"
+    --ignore-glob="*memento.py"
 exclude = --exclude make_dist.py,.tox,.git,./*.egg,build,./scripts/i18n/*
 generate_user_files = -W error::UserWarning -m pwb generate_user_files -family:wikipedia -lang:test -v
 
@@ -41,7 +44,7 @@ deps =
     flake8: .[flake8]
     hacking: .[hacking]
 
-    fasttest: pytest >= 5.3
+    fasttest: pytest >= 7.0.1
     fasttest: pytest-attrib>=0.1.3
     fasttest: pytest-subtests >= 0.3.2
     fasttest: mock
@@ -65,10 +68,10 @@ commands = commit-message-validator
 basepython = python3
 commands =
     python {[params]generate_user_files}
-    nosetests --version
-    nosetests -v --with-doctest pywikibot {[params]doctest_skip}
+    pytest --version
+    pytest pywikibot --doctest-modules {[params]doctest_skip}
 deps =
-    nose
+    pytest >= 7.0.1
     .[eventstreams]
     .[mwparserfromhell]
     .[mysql]
@@ -232,8 +235,7 @@ exclude = .tox,.git,./*.egg,build,./scripts/i18n/*
 ignore = D105,D211
 
 [pytest]
-minversion = 5.3
+minversion = 7.0.1
 testpaths = tests
 python_files = *_tests.py
 addopts = --ignore=tests/l10n_tests.py
-filterwarnings = ignore::pytest.PytestDeprecationWarning