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: Icb3886271885bfee19981a6acdda3163f3cd72f8

.gitignore

@@ -34,10 +34,9 @@ pip-delete-this-directory.txt
 # Unit test / coverage reports
 htmlcov/
 .tox/
-.testrepository
+.stestr/
 .coverage
 .cache
-nosetests.xml
 coverage.xml
 cover
 

.stestr.conf

@@ -0,0 +1,4 @@
+[DEFAULT]
+test_path=./cloudkitty/tests
+top_dir=./
+group_regex=gabbi\.(suitemaker|driver)\.(test_[^_]+_[^_]+)

.testr.conf

@@ -1,5 +0,0 @@
-[DEFAULT]
-test_command=${PYTHON:-python} -m subunit.run discover -t ./ ./cloudkitty/tests $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list
-group_regex=gabbi\.(suitemaker|driver)\.(test_[^_]+_[^_]+)

test-requirements.txt

@@ -10,7 +10,7 @@ kombu<4.0.0 # BSD
 ddt>=1.0.1 # MIT
 gabbi>=1.26.1 # Apache-2.0
 testscenarios>=0.4 # Apache-2.0/BSD
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 mock>=1.2 # BSD
 sphinx>=1.6.2 # BSD
 openstackdocstheme>=1.11.0 # Apache-2.0

tox.ini

@@ -15,7 +15,7 @@ deps = -r{toxinidir}/requirements.txt
 commands =
   /usr/bin/find . -type f -name "*.py[co]" -delete
   rm -f .testrepository/times.dbm
-  python setup.py testr --testr-args='{posargs}'
+  stestr run {posargs}
 
 [testenv:debug]
 basepython = python3
@@ -28,10 +28,15 @@ commands =
 
 [testenv:cover]
 basepython = python3
-setenv = VIRTUAL_ENV={envdir}
+setenv =
+    VIRTUAL_ENV={envdir}
+    PYTHON=coverage run --source $project --parallel-mode
 commands =
-  python setup.py testr --coverage --testr-args='{posargs}'
-  coverage report
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
+    coverage report
 
 [testenv:genconfig]
 basepython = python3