Add support of python 3.10. Migrate from nose to nose2.

.coveragerc

@@ -1,2 +1,6 @@
+[run]
+branch = true
+
 [report]
 show_missing = true
+fail_under = 80

CHANGELOG.md

@@ -6,7 +6,9 @@ and this project adheres to [Semantic Versioning](http://semver.org/spec/v2.0.0.
 
 ## \[4.0.0] - 2022-12-14
 -   Dropped support of python 3.6
+-   Added support of python 3.10
 -   Setup tox-gh-actions 
+-   Migrated from nose to nose2
 
 ## \[3.0.5] - 2022-03-21
 -   Fixed parsing of for expressions when there is a new line before the colon

test-requirements.pip

@@ -3,8 +3,7 @@ pylint
 pycodestyle
 mypy
 # Testing tools
-nose>=1.1,<2
-nose-cov>=1.5,<2
+nose2[coverage_plugin]>=0.12,<1
 mock>=1.0.1,<2
-coverage>=4.5.1,<5
+coverage>=6.5,<7
 # Additional libraries

tox.ini

@@ -1,17 +1,18 @@
 [tox]
-envlist=lint,{py37}-unit,{py38}-unit,{py39}-unit
+envlist=lint,{py37}-unit,{py38}-unit,{py39}-unit,{py310}-unit
 skipsdist=true
 
 [gh-actions]
 python =
     3.7: py37-unit, lint
     3.8: py38-unit
     3.9: py39-unit
+    3.10: py310-unit
 
 [testenv]
 commands =
-    pip install --upgrade -r requirements.pip -r test-requirements.pip -e .
-    nosetests --config=tox.ini hcl2 bin test/unit
+    pip install --upgrade -r requirements.pip -r test-requirements.pip .
+    nose2 --config tox.ini --verbose
     coverage xml -o reports/coverage.xml --omit=hcl2/lark_parser.py
 
 [testenv:lint]
@@ -36,18 +37,22 @@ commands =
     rm -f hcl2/lark_parser.py
     python bin/terraform_test {posargs}
 
-[nosetests]
-with-coverage=true
-cover-package=hcl2
-cover-inclusive=true
-cover-erase=true
-cover-min-percentage=80
-cover-branches=true
-stop=true
-detailed-errors=true
-verbosity=3
-with-xunit=true
-xunit-file=reports/nosetests.xml
+[unittest]
+plugins=nose2.plugins.junitxml
+code-directories=hcl2
+start-dir=test
+test-file-pattern=test_*.py
+
+[coverage]
+always-on=True
+coverage=hcl2
+coverage-report=
+    xml
+    term
+
+[junit-xml]
+always-on=True
+path=reports/nose2.xml
 
 [pycodestyle]
 max_line_length=110