Migrating oslo.config to use stestr

os-testr has moved over to use stestr instead of testr. While this
is usually compaible with existing settings, there is a warning
that is emitted when .stestr.conf is not present. It is usually
able to fall back to parsing the .testr.conf file, but to be more
correct and to prevent future problems we should update the config.

Change-Id: I929f75d069f20b8cfa8af4e0712883e91a54dc4f

.gitignore

@@ -24,6 +24,7 @@ doc/source/api/
 dist/
 .testrepository/
 /doc/source/sample.config
+.stestr/
 
 # Files created by releasenotes build
 releasenotes/build

.stestr.conf

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

lower-constraints.txt

@@ -46,6 +46,7 @@ smmap==0.9.0
 snowballstemmer==1.2.1
 Sphinx==1.6.2
 sphinxcontrib-websupport==1.0.1
+stestr==2.0.0
 stevedore==1.20.0
 testrepository==0.0.18
 testscenarios==0.4

test-requirements.txt

@@ -6,6 +6,7 @@ hacking!=0.13.0,<0.14,>=0.12.0 # Apache-2.0
 fixtures>=3.0.0 # Apache-2.0/BSD
 testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 oslotest>=3.2.0 # Apache-2.0
 

tox.ini

@@ -5,13 +5,17 @@ envlist = py35,py27,pep8
 
 [testenv]
 install_command = pip install {opts} {packages}
+setenv = OS_STDOUT_CAPTURE=1
+         OS_STDERR_CAPTURE=1
+         OS_TEST_TIMEOUT=60
 deps =
   -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt}
   -r{toxinidir}/test-requirements.txt
   -r{toxinidir}/requirements.txt
 commands =
-  python setup.py test --coverage --coverage-package-name=oslo_config --slowest --testr-args='{posargs}'
-  coverage report --show-missing
+  find . -type f -name "*.pyc" -delete
+  stestr run {posargs}
+  stestr slowest
 
 [testenv:lower-constraints]
 basepython = python3
@@ -33,7 +37,11 @@ commands =
 [testenv:cover]
 basepython = python3
 commands =
-  python setup.py test --coverage --coverage-package-name=oslo_config --testr-args='{posargs}'
+  coverage erase
+  {[testenv]commands}
+  coverage combine
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
   coverage report --show-missing
 
 [testenv:venv]