Migrate from testr to stestr

* Replace .testr.conf by .stestr.conf for migration and update
  .gitignore and test-requirements.txt file accordingly
* Use py3 as the default runtime for tox

Change-Id: Ib24d7b90a20f3b56993c1faede020c015395a1be

.gitignore

@@ -27,7 +27,7 @@ cover/
 !.coveragerc
 .tox
 nosetests.xml
-.testrepository
+.stestr/
 .venv
 
 # Translations

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=./zun_tempest_plugin/tests/
+top_dir=./

.testr.conf

@@ -1,7 +0,0 @@
-[DEFAULT]
-test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
-             OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
-             OS_TEST_TIMEOUT=${OS_TEST_TIMEOUT:-60} \
-             ${PYTHON:-python} -m subunit.run discover -t ./ . $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

test-requirements.txt

@@ -3,3 +3,5 @@
 # process, which may cause wedges in the gate later.
 
 hacking>=3.0.1,<3.1.0;python_version>='3.5' # Apache-2.0
+coverage>=3.6
+stestr>=2.0.0 # Apache-2.0

tox.ini

@@ -1,6 +1,6 @@
 [tox]
-minversion = 3.1.1
-envlist = py35,pep8
+minversion = 3.18.0
+envlist = py3,pep8
 skipsdist = True
 ignore_basepython_conflict = True
 
@@ -8,12 +8,17 @@ ignore_basepython_conflict = True
 basepython = python3
 usedevelop = True
 setenv =
-   VIRTUAL_ENV={envdir}
-   PYTHONWARNINGS=default::DeprecationWarning
+  LANGUAGE=en_US
+  LC_ALL=en_US.utf-8
+  OS_STDOUT_CAPTURE=1
+  OS_STDERR_CAPTURE=1
+  OS_TEST_TIMEOUT=60
+  PYTHONDONTWRITEBYTECODE=1
+  PYTHONWARNINGS=default::DeprecationWarning
 deps =
     -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}
     -r{toxinidir}/test-requirements.txt
-commands = python setup.py test --slowest --testr-args='{posargs}'
+commands = stestr run --slowest {posargs}
 
 [testenv:pep8]
 commands = flake8 {posargs}
@@ -22,7 +27,17 @@ commands = flake8 {posargs}
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py test --coverage --testr-args='{posargs}'
+allowlist_externals = find
+setenv =
+  PYTHON=coverage run --source zun-tempest-plugin --parallel-mode
+commands =
+  coverage erase
+  find . -type f -name "*.pyc" -delete
+  stestr run {posargs}
+  coverage combine
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
+  coverage report
 
 [testenv:docs]
 deps = -c{env:TOX_CONSTRAINTS_FILE:https://releases.openstack.org/constraints/upper/master}