Migrate from testr to stestr

* Replace .testr.conf by .stestr.conf for migration and update
  .gitignore, test-requirements.txt and lower-constraints.txt
  files accordingly
* Use py3 as the default runtime for tox and 3.18.0 as the
  minversion for tox
* Add a new job, openstack-cover-jobs, to run the coverage in Zuul

Change-Id: If6fa3f2f861d5eb6787743edcc6333e5aacef7d0

.gitignore

@@ -11,6 +11,6 @@ eggs
 
 AUTHORS
 ChangeLog
-.testrepository/
+.stestr/
 cover/
 .coverage

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=./blazarclient/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 $DISCOVER_DIRECTORY $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

.zuul.yaml

@@ -4,3 +4,4 @@
       - openstack-lower-constraints-jobs
       - openstack-python3-xena-jobs
       - release-notes-jobs-python3
+      - openstack-cover-jobs

lower-constraints.txt

@@ -36,8 +36,8 @@ PyYAML==3.12
 requests==2.14.2
 requestsexceptions==1.2.0
 rfc3986==0.3.1
+stestr==2.0.0
 stevedore==1.20.0
-testrepository==0.0.18
 testtools==2.2.0
 traceback2==1.4.0
 unittest2==1.1.0

test-requirements.txt

@@ -9,6 +9,6 @@ pyflakes>=2.1.1
 
 oslotest>=3.2.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 coverage!=4.4,>=4.0 # Apache-2.0

tox.ini

@@ -1,6 +1,6 @@
 [tox]
-minversion = 3.1.1
+minversion = 3.18.0
-envlist = py36,py38,pep8
+envlist = py3,pep8
 ignore_basepython_conflict = True
 
 [testenv]
@@ -12,8 +12,7 @@ deps =
        -r{toxinidir}/requirements.txt
 setenv = VIRTUAL_ENV={envdir}
          DISCOVER_DIRECTORY=blazarclient/tests
-commands =
+commands =  stestr run --slowest '{posargs}'
-    python setup.py testr --slowest --testr-args="{posargs}"
 
 [testenv:pep8]
 commands = flake8
@@ -37,8 +36,18 @@ deps =
 commands = {posargs}
 
 [testenv:cover]
+allowlist_externals = find
+setenv =
+  {[testenv]setenv}
+  PYTHON=coverage run --source blazarclient --parallel-mode
 commands =
-  python setup.py testr --coverage --testr-args='{posargs}'
+  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:lower-constraints]
 deps =