Switch to using stestr

stestr is maintained project to which all Openstack projects
should migrate.

[1] https://etherpad.openstack.org/p/YVR-python-pti
[2] https://governance.openstack.org/tc/reference/pti/python.html

Change-Id: I3a4a8e6a7c856446686252d80046532e08d3936b

.stestr.conf

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

.testr.conf

@@ -1,4 +0,0 @@
-[DEFAULT]
-test_command=OS_STDOUT_CAPTURE=1 OS_STDERR_CAPTURE=1 OS_LOG_CAPTURE=1 ${PYTHON:-python} -m subunit.run discover -t ./ ${OS_TEST_PATH:-./tacker/tests/unit} $LISTOPT $IDOPTION
-test_id_option=--load-list $IDFILE
-test_list_option=--list

lower-constraints.txt

@@ -65,7 +65,6 @@ openstacksdk==0.12.0
 os-api-ref==1.5.0
 os-client-config==1.29.0
 os-service-types==1.2.0
-os-testr==1.0.0
 osc-lib==1.10.0
 oslo.cache==1.29.0
 oslo.concurrency==3.26.0
@@ -143,7 +142,6 @@ stevedore==1.20.0
 tempest==17.1.0
 Tempita==0.5.2
 tenacity==4.9.0
-testrepository==0.0.18
 testresources==2.0.1
 testscenarios==0.5.0
 testtools==2.2.0

test-requirements.txt

@@ -12,9 +12,8 @@ mock>=2.0.0 # BSD
 python-subunit>=1.0.0 # Apache-2.0/BSD
 python-tackerclient>=0.8.0 # Apache-2.0
 oslotest>=3.2.0 # Apache-2.0
-os-testr>=1.0.0 # Apache-2.0
+stestr>=2.0.0 # Apache-2.0
 tempest>=17.1.0 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 WebTest>=2.0.27 # MIT
 python-barbicanclient>=4.5.2 # Apache-2.0

tools/ostestr_compat_shim.sh

@@ -1,8 +0,0 @@
-#!/bin/sh
-
-# preserve old behavior of using an arg as a regex when '--' is not present
-case $@ in
-  (*--*) ostestr $@;;
-  ('') ostestr;;
-  (*) ostestr --regex "$@"
-esac

tox.ini

@@ -6,6 +6,9 @@ skipsdist = True
 [testenv]
 basepython = {env:TACKER_TOX_PYTHON:python2}
 setenv = VIRTUAL_ENV={envdir}
+         OS_LOG_CAPTURE={env:OS_LOG_CAPTURE:true}
+         OS_STDOUT_CAPTURE={env:OS_STDOUT_CAPTURE:true}
+         OS_STDERR_CAPTURE={env:OS_STDERR_CAPTURE:true}
 passenv = UPPER_CONSTRAINTS_FILE
 usedevelop = True
 whitelist_externals = rm
@@ -14,8 +17,7 @@ install_command =
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands =
-   rm -f .testrepository/times.dbm
-   {toxinidir}/tools/ostestr_compat_shim.sh {posargs}
+   stestr run --slowest {posargs}
 
 [testenv:functional]
 setenv = OS_TEST_PATH=./tacker/tests/functional
@@ -29,7 +31,7 @@ setenv = {[testenv]setenv}
 deps =
   {[testenv:functional]deps}
 commands =
-  {toxinidir}/tools/ostestr_compat_shim.sh --concurrency 2 {posargs}
+  stestr run --slowest --concurrency 2 {posargs}
 
 [testenv:debug]
 commands = oslo_debug_helper {posargs}
@@ -62,8 +64,6 @@ commands =
   sphinx-build -W -b html doc/source doc/build/html
 
 [testenv:api-ref]
-# This environment is called from CI scripts to test and publish
-# the API Ref to developer.openstack.org.
 deps = -r{toxinidir}/doc/requirements.txt
 commands =
   rm -rf api-ref/build
@@ -75,14 +75,14 @@ deps = -r{toxinidir}/doc/requirements.txt
 commands =
   sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasenotes/source releasenotes/build/html
 
-
 [testenv:cover]
-# Also do not run test_coverage_ext tests while gathering coverage as those
-# tests conflict with coverage.
+setenv =
+    PYTHON=coverage run --source tacker --parallel-mode
 commands =
-  coverage erase
-  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
 
 [testenv:venv]
 commands = {posargs}