Finish stestr migration

Nova switched to using stestr for all it's in tree testing except for
the coverage job. This commit updates that job so it also uses stestr
and cleans up the last bits of testr setup left in tree. As part of
this change this moves all the one off per job configuration into the
tox job definitions instead of hiding it in either the .stestr.conf or
in a wrapper script.

Change-Id: I36e0e791d485b44641a1ed8770eca8e95aca19be

.stestr.conf

@@ -1,4 +1,3 @@
 [DEFAULT]
-test_path=${OS_TEST_PATH:-./nova/tests}
+test_path=./nova/tests/unit
 top_dir=./
-group_regex=nova\.tests\.functional\.api\.openstack\.placement\.test_placement_api(?:\.|_)([^_]+)

test-requirements.txt

@@ -18,9 +18,8 @@ sphinxcontrib-actdiag>=0.8.5 # BSD
 sphinxcontrib-seqdiag>=0.8.4 # BSD
 os-api-ref>=1.4.0 # Apache-2.0
 oslotest>=1.10.0 # Apache-2.0
-os-testr>=1.0.0 # Apache-2.0
+stestr>=1.0.0 # Apache-2.0
 osprofiler>=1.4.0 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/BSD
 testresources>=2.0.0 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT

tox.ini

@@ -20,14 +20,11 @@ setenv = VIRTUAL_ENV={envdir}
 deps = -r{toxinidir}/test-requirements.txt
 commands =
   find . -type f -name "*.pyc" -delete
-  rm -Rf .testrepository/times.dbm
 passenv = OS_DEBUG GENERATE_HASHES
 # there is also secret magic in subunit-trace which lets you run in a fail only
 # mode. To do this define the TRACE_FAILONLY environmental variable.
 
 [testenv:py27]
-setenv = {[testenv]setenv}
-         OS_TEST_PATH=./nova/tests/unit
 commands =
     {[testenv]commands}
     stestr run '{posargs}'
@@ -35,11 +32,9 @@ commands =
     stestr slowest
 
 [testenv:py35]
-setenv = {[testenv]setenv}
-         OS_TEST_PATH=./nova/tests/unit
 commands =
     {[testenv]commands}
-    bash tools/pretty_tox3.sh '{posargs}'
+    stestr run --blacklist-file=tests-py3.txt '{posargs}'
     env TEST_OSPROFILER=1 stestr run --combine --no-discover 'nova.tests.unit.test_profiler'
 
 
@@ -68,10 +63,17 @@ commands =
 basepython = python2.7
 usedevelop = True
 setenv = {[testenv]setenv}
-         OS_TEST_PATH=./nova/tests/functional
 commands =
   {[testenv]commands}
-  stestr run '{posargs}'
+# NOTE(cdent): The group_regex describes how stestr will group tests into the
+# same process when running concurently. The following ensures that gabbi tests
+# coming from the same YAML file are all in the same process. This is important
+# because each YAML file represents an ordered sequence of HTTP requests. Note
+# that tests which do not match this regex will not be grouped in any
+# special way. See the following for more details.
+# http://stestr.readthedocs.io/en/latest/MANUAL.html#grouping-tests
+# https://gabbi.readthedocs.io/en/latest/#purpose
+  stestr --test-path=./nova/tests/functional --group-regex=nova\.tests\.functional\.api\.openstack\.placement\.test_placement_api(?:\.|_)([^_]+) run '{posargs}'
   stestr slowest
 
 # TODO(gcb) Merge this into [testenv:functional] when functional tests are gating
@@ -80,20 +82,26 @@ commands =
 basepython = python3.5
 usedevelop = True
 setenv = {[testenv]setenv}
-         OS_TEST_PATH=./nova/tests/functional
 commands =
     {[testenv]commands}
-    bash tools/pretty_tox3.sh '{posargs}'
+# NOTE(cdent): The group_regex describes how stestr will group tests into the
+# same process when running concurently. The following ensures that gabbi tests
+# coming from the same YAML file are all in the same process. This is important
+# because each YAML file represents an ordered sequence of HTTP requests. Note
+# that tests which do not match this regex will not be grouped in any
+# special way. See the following for more details.
+# http://stestr.readthedocs.io/en/latest/MANUAL.html#grouping-tests
+# https://gabbi.readthedocs.io/en/latest/#purpose
+    stestr --test-path=./nova/tests/functional --group-regex=nova\.tests\.functional\.api\.openstack\.placement\.test_placement_api(?:\.|_)([^_]+) run '{posargs}'
 
 [testenv:api-samples]
 usedevelop = True
 setenv = {[testenv]setenv}
          GENERATE_SAMPLES=True
          PYTHONHASHSEED=0
-         OS_TEST_PATH=./nova/tests/functional/api_sample_tests
 commands =
   find . -type f -name "*.pyc" -delete
-  stestr run '{posargs}'
+  stestr --test-path=./nova/tests/functional/api_sample_tests run '{posargs}'
   stestr slowest
 
 [testenv:genconfig]
@@ -105,10 +113,15 @@ commands = oslopolicy-sample-generator --config-file=etc/nova/nova-policy-genera
 [testenv:cover]
 # Also do not run test_coverage_ext tests while gathering coverage as those
 # tests conflict with coverage.
+setenv = {[testenv]setenv}
+         PYTHON=coverage run --source nova --parallel-mode
 commands =
   coverage erase
   find . -type f -name "*.pyc" -delete
-  python setup.py testr --coverage --testr-args='{posargs}'
+  stestr run '{posargs}'
+  coverage combine
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
   coverage report
 
 [testenv:debug]