Add microversion support in scenario tests

Scenario test call multiple service APIs within
same test. Many service like compute, volume etc
support microversion but scenario test does not
support microversion yet.

This commit adds the microversion support in scenario tests
so that they will be able to set multiple service microversion
at the same time.

Change-Id: I446e082331c9d1b37c40c9eeb896eec222c3c045

releasenotes/notes/support-microversion-in-scenario-test-b4fbfdd3a977fc58.yaml

@@ -0,0 +1,14 @@
+---
+features:
+  - |
+    Add microversion support for scenario tests. Scenario test calls
+    multiple service API within same test and many services like compute,
+    volume and placement etc support API microversion. With microversion
+    support in scenario test, we can call different service API with
+    different microvesion. Which means we can implement scenario tests
+    for microversion also.
+    Currently Scenario manager support below services microversion:
+
+    * Compute
+    * Volume
+    * Placement

tempest/scenario/manager.py

@@ -28,6 +28,8 @@ from tempest.common.utils import net_utils
 from tempest.common import waiters
 from tempest import config
 from tempest import exceptions
+from tempest.lib.common import api_microversion_fixture
+from tempest.lib.common import api_version_utils
 from tempest.lib.common.utils import data_utils
 from tempest.lib.common.utils import test_utils
 from tempest.lib import exceptions as lib_exc
@@ -37,12 +39,57 @@ CONF = config.CONF
 
 LOG = log.getLogger(__name__)
 
+LATEST_MICROVERSION = 'latest'
+
 
 class ScenarioTest(tempest.test.BaseTestCase):
     """Base class for scenario tests. Uses tempest own clients. """
 
     credentials = ['primary']
 
+    compute_min_microversion = None
+    compute_max_microversion = LATEST_MICROVERSION
+    volume_min_microversion = None
+    volume_max_microversion = LATEST_MICROVERSION
+    placement_min_microversion = None
+    placement_max_microversion = LATEST_MICROVERSION
+
+    @classmethod
+    def skip_checks(cls):
+        super(ScenarioTest, cls).skip_checks()
+        api_version_utils.check_skip_with_microversion(
+            cls.compute_min_microversion, cls.compute_max_microversion,
+            CONF.compute.min_microversion, CONF.compute.max_microversion)
+        api_version_utils.check_skip_with_microversion(
+            cls.volume_min_microversion, cls.volume_max_microversion,
+            CONF.volume.min_microversion, CONF.volume.max_microversion)
+        api_version_utils.check_skip_with_microversion(
+            cls.placement_min_microversion, cls.placement_max_microversion,
+            CONF.placement.min_microversion, CONF.placement.max_microversion)
+
+    @classmethod
+    def resource_setup(cls):
+        super(ScenarioTest, cls).resource_setup()
+        cls.compute_request_microversion = (
+            api_version_utils.select_request_microversion(
+                cls.compute_min_microversion,
+                CONF.compute.min_microversion))
+        cls.volume_request_microversion = (
+            api_version_utils.select_request_microversion(
+                cls.volume_min_microversion,
+                CONF.volume.min_microversion))
+        cls.placement_request_microversion = (
+            api_version_utils.select_request_microversion(
+                cls.placement_min_microversion,
+                CONF.placement.min_microversion))
+
+    def setUp(self):
+        super(ScenarioTest, self).setUp()
+        self.useFixture(api_microversion_fixture.APIMicroversionFixture(
+            compute_microversion=self.compute_request_microversion,
+            volume_microversion=self.volume_request_microversion,
+            placement_microversion=self.placement_request_microversion))
+
     @classmethod
     def setup_clients(cls):
         super(ScenarioTest, cls).setup_clients()