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: I0ec7bc7926e57b243e38b2c696815e648d0b3f61

.gitignore

@@ -15,7 +15,7 @@ coverage.xml
 *.py[co]
 .DS_Store
 *.log
-.testrepository
+.stestr/
 subunit.log
 .eggs
 AUTHORS

.stestr.conf

@@ -0,0 +1,4 @@
+[DEFAULT]
+test_path=${OS_TEST_PATH:-./freezer/tests/unit}
+top_dir=./
+group_regex=([^\.]+\.)+

.testr.conf

@@ -1,9 +0,0 @@
-[DEFAULT]
-test_command=OS_STDOUT_CAPTURE=${OS_STDOUT_CAPTURE:-1} \
-             OS_STDERR_CAPTURE=${OS_STDERR_CAPTURE:-1} \
-             OS_LOG_CAPTURE=${OS_LOG_CAPTURE:-1} \
-             ${PYTHON:-python} -m subunit.run discover -s ${OS_TEST_PATH:-./freezer/tests/unit} -t . $LISTOPT $IDOPTION
-
-test_id_option=--load-list $IDFILE
-test_list_option=--list
-group_regex=([^\.]+\.)+

lower-constraints.txt

@@ -113,7 +113,7 @@ sphinxcontrib-websupport==1.0.1
 stestr==2.0.0
 stevedore==1.28.0
 tempest==17.1.0
-testrepository==0.0.18
+stestr==2.0.0
 testtools==2.2.0
 traceback2==1.4.0
 tzlocal==1.5.1

test-requirements.txt

@@ -9,7 +9,7 @@ mock>=2.0.0 # BSD
 pylint==1.4.5 # GPLv2
 sphinx!=1.6.6,!=1.6.7,>=1.6.2 # BSD
 openstackdocstheme>=1.18.1 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/BSD
+stestr>=2.0.0 # Apache-2.0
 testtools>=2.2.0 # MIT
 reno>=2.5.0 # Apache-2.0
 astroid<1.4.0 # LGPLv2.1 # breaks pylint 1.4.4

tox.ini

@@ -22,7 +22,19 @@ passenv =
     http_proxy HTTP_PROXY https_proxy HTTPS_PROXY no_proxy NO_PROXY
 
 install_command = pip install -c{env:UPPER_CONSTRAINTS_FILE:https://git.openstack.org/cgit/openstack/requirements/plain/upper-constraints.txt} {opts} {packages}
-setenv = VIRTUAL_ENV={envdir}
+setenv =
+    VIRTUAL_ENV={envdir}
+    OS_TEST_PATH = ./freezer/tests/unit
+    PYTHON=coverage run --source freezer --parallel-mode
+commands =
+    find . -type f -name "*.pyc" -delete
+    stestr run '{posargs}'
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
+    coverage report -m
+    rm -f .coverage
+    rm -rf .testrepository
 
 whitelist_externals =
     find
@@ -37,36 +49,12 @@ commands = {posargs}
 
 [testenv:py27]
 basepython = python2.7
-setenv =
-    OS_TEST_PATH = ./freezer/tests/unit
-commands =
-    find . -type f -name "*.pyc" -delete
-    python setup.py testr --coverage --testr-args="{posargs}"
-    coverage report -m
-    rm -f .coverage
-    rm -rf .testrepository
 
 [testenv:py35]
 basepython = python3.5
-setenv =
-  OS_TEST_PATH = ./freezer/tests/unit
-commands =
-    find . -type f -name "*.pyc" -delete
-    python setup.py testr --coverage --testr-args="{posargs}"
-    coverage report -m
-    rm -f .coverage
-    rm -rf .testrepository
 
 [testenv:py36]
 basepython = python3.6
-setenv =
-  OS_TEST_PATH = ./freezer/tests/unit
-commands =
-    find . -type f -name "*.pyc" -delete
-    python setup.py testr --coverage --testr-args="{posargs}"
-    coverage report -m
-    rm -f .coverage
-    rm -rf .testrepository
 
 [testenv:docs]
 whitelist_externals = rm