pytest migration + enable Python 3.10 (#464)

Co-authored-by: pgajdos <[email protected]>
Co-authored-by: epenet <[email protected]>

.github/workflows/tests.yml

@@ -14,12 +14,13 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - { python-version: "3.9", session: "flake8" }
-          - { python-version: "3.9", session: "py39" }
-          - { python-version: "3.8", session: "py38" }
-          - { python-version: "3.7", session: "py37" }
-          - { python-version: "3.6", session: "py36" }
-          - { python-version: "2.7", session: "py27" }
+          - { python-version: "3.10", session: "flake8" }
+          - { python-version: "3.10", session: "py310" }
+          - { python-version: "3.9",  session: "py39" }
+          - { python-version: "3.8",  session: "py38" }
+          - { python-version: "3.7",  session: "py37" }
+          - { python-version: "3.6",  session: "py36" }
+          - { python-version: "2.7",  session: "py27" }
 
     steps:
       - name: Check out the repository

README.md

@@ -715,9 +715,9 @@ s({'password':'123', 'password_again': 1337})
 
 ## Running tests
 
-Voluptuous is using nosetests:
+Voluptuous is using pytest:
 
-    $ nosetests
+    $ pytest
 
 
 ## Other libraries and inspirations

pytest.ini

@@ -0,0 +1,4 @@
+[pytest]
+python_files = tests.py
+testpaths = voluptuous/tests
+addopts = --doctest-glob=*.md -v

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = flake8,py27,py36,py37,py38,py39
+envlist = flake8,py27,py36,py37,py38,py39,py310
 
 [flake8]
 ; E501: line too long (X > 79 characters)
@@ -12,15 +12,13 @@ distribute = True
 sitepackages = False
 setuptools_version = setuptools<58.0
 deps =
-    nose
-    nose-cover3
+    pytest
+    pytest-cov
     coverage>=3.0
 commands =
-    nosetests \
-        --with-coverage3 \
-            --cover3-package=voluptuous \
-            --cover3-branch \
-        --verbose {posargs}
+    pytest \
+        --cov=voluptuous \
+        voluptuous/tests/
 
 [testenv:flake8]
 deps = flake8