Migrate from testr to stestr

* Replace .testr.conf by .stestr.conf for migration and update
  .gitignore,test-requirements files accordingly
* Use 3.18.0 as the minversion for tox

Change-Id: I6bf98adecb772896c6243a90271a1b258569a4df

.gitignore

@@ -25,7 +25,7 @@ pip-log.txt
 .coverage
 .tox
 nosetests.xml
-.testrepository
+.stestr/
 .venv
 
 # Translations

.stestr.conf

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

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

test-requirements.txt

@@ -7,7 +7,7 @@ hacking>=3.0.1,<3.1.0 # Apache-2.0
 coverage>=3.6
 python-subunit>=0.0.18
 nodeenv>=0.9.4 # BSD
-testrepository>=0.0.18
+stestr>=2.0.0 # Apache-2.0
 testscenarios>=0.4
 testtools>=1.4.0
 pytest>=5.3.5 # MIT

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-minversion = 2.3.2
+minversion = 3.18.0
 envlist = py3,pep8,npm
 skipsdist = True
 ignore_basepython_conflict = True
@@ -54,7 +54,18 @@ deps =
 commands = {posargs}
 
 [testenv:cover]
-commands = python setup.py test --coverage --testr-args='{posargs}'
+allowlist_externals = find
+setenv =
+  PYTHON=coverage run --source vitrage-dashboard --parallel-mode
+commands =
+  coverage erase
+  find . -type f -name "*.pyc" -delete
+  stestr run {posargs}
+  coverage combine
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
+  coverage report
+
 
 [testenv:docs]
 deps = -r{toxinidir}/doc/requirements.txt