Switch to stestr

According to Openstack summit session [1],
stestr is maintained project to which all Openstack projects should migrate.
Let's switch to stestr as other projects have already moved to it.

[1] https://etherpad.openstack.org/p/YVR-python-pti

Change-Id: I829d57082b4fb981dfab6ed0f976bb30f28b7901

.gitignore

@@ -24,8 +24,7 @@ pip-log.txt
 # Unit test / coverage reports
 .coverage
 .tox
-nosetests.xml
-.testrepository
+.stestr/
 
 # Translations
 *.mo

.stestr.conf

@@ -0,0 +1,3 @@
+[DEFAULT]
+test_path=./oslo_cache/tests
+top_path=./

.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 ./ ./oslo_cache $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

lower-constraints.txt

@@ -59,8 +59,8 @@ requestsexceptions==1.4.0
 rfc3986==1.1.0
 six==1.10.0
 smmap2==2.0.3
+stestr==2.0.0
 stevedore==1.28.0
-testrepository==0.0.20
 testtools==2.3.0
 traceback2==1.4.0
 unittest2==1.1.0

test-requirements.txt

@@ -7,3 +7,4 @@ oslotest>=3.2.0 # Apache-2.0
 pifpaf>=0.10.0 # Apache-2.0
 # Bandit security code scanner
 bandit>=1.1.0 # Apache-2.0
+stestr>=2.0.0 # Apache-2.0

tox.ini

@@ -14,17 +14,17 @@ deps = .[dogpile]
        -r{toxinidir}/test-requirements.txt
 commands =
     find . -type f -name "*.pyc" -delete
-    python setup.py testr --slowest --testr-args='{posargs}'
+    stestr run --slowest {posargs}
 
 [testenv:py27-functional-etcd3gw]
 commands =
     find . -type f -name "*.pyc" -delete
-    {toxinidir}/tools/setup-etcd-env.sh pifpaf -e OSLO_CACHE_TEST run etcd --  python setup.py testr --slowest --testr-args='functional.*'
+    {toxinidir}/tools/setup-etcd-env.sh pifpaf -e OSLO_CACHE_TEST run etcd --  stestr run --slowest functional.*
 
 [testenv:py35-functional-etcd3gw]
 commands =
     find . -type f -name "*.pyc" -delete
-    {toxinidir}/tools/setup-etcd-env.sh pifpaf -e OSLO_CACHE_TEST run etcd --  python setup.py testr --slowest --testr-args='functional.*'
+    {toxinidir}/tools/setup-etcd-env.sh pifpaf -e OSLO_CACHE_TEST run etcd --  stestr run --slowest functional.*
 
 [testenv:pep8]
 basepython = python3
@@ -49,7 +49,13 @@ commands =
 
 [testenv:cover]
 basepython = python3
-commands = python setup.py testr --coverage --testr-args='{posargs}'
+setenv =
+    PYTHON=coverage run --source $project --parallel-mode
+commands =
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
 
 [flake8]
 show-source = True