Inherit V2 API's flavors tests from V3 tests

There is a lot of copy&paste test code for Nova v2/v3 API tests.
In addition, we need to add many checks for API test coverage.
As the result, we should apply the same changes to v2 and v3 tests.

This patch reuse the test code of flavors APIs between V2 and V3
Inheriting the V2 flavors API's test from V3 tests.

Partially implements blueprint nova-api-test-inheritance

Change-Id: I85463baec7af1e4e8bcc6310804fd15c1958d7ed
diff --git a/tempest/api/compute/flavors/test_flavors.py b/tempest/api/compute/flavors/test_flavors.py
index 6e202f6..bfebb5e 100644
--- a/tempest/api/compute/flavors/test_flavors.py
+++ b/tempest/api/compute/flavors/test_flavors.py
@@ -17,11 +17,15 @@
 from tempest import test
 
 
-class FlavorsTestJSON(base.BaseV2ComputeTest):
+class FlavorsV3Test(base.BaseComputeTest):
+
+    _api_version = 3
+    _min_disk = 'min_disk'
+    _min_ram = 'min_ram'
 
     @classmethod
     def setUpClass(cls):
-        super(FlavorsTestJSON, cls).setUpClass()
+        super(FlavorsV3Test, cls).setUpClass()
         cls.client = cls.flavors_client
 
     @test.attr(type='smoke')
@@ -89,7 +93,7 @@
         flavors = sorted(flavors, key=lambda k: k['disk'])
         flavor_id = flavors[0]['id']
 
-        params = {'minDisk': flavors[0]['disk'] + 1}
+        params = {self._min_disk: flavors[0]['disk'] + 1}
         resp, flavors = self.client.list_flavors_with_detail(params)
         self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))
 
@@ -100,7 +104,7 @@
         flavors = sorted(flavors, key=lambda k: k['ram'])
         flavor_id = flavors[0]['id']
 
-        params = {'minRam': flavors[0]['ram'] + 1}
+        params = {self._min_ram: flavors[0]['ram'] + 1}
         resp, flavors = self.client.list_flavors_with_detail(params)
         self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))
 
@@ -111,7 +115,7 @@
         flavors = sorted(flavors, key=lambda k: k['disk'])
         flavor_id = flavors[0]['id']
 
-        params = {'minDisk': flavors[0]['disk'] + 1}
+        params = {self._min_disk: flavors[0]['disk'] + 1}
         resp, flavors = self.client.list_flavors(params)
         self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))
 
@@ -122,10 +126,17 @@
         flavors = sorted(flavors, key=lambda k: k['ram'])
         flavor_id = flavors[0]['id']
 
-        params = {'minRam': flavors[0]['ram'] + 1}
+        params = {self._min_ram: flavors[0]['ram'] + 1}
         resp, flavors = self.client.list_flavors(params)
         self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))
 
 
-class FlavorsTestXML(FlavorsTestJSON):
+class FlavorsV2TestJSON(FlavorsV3Test):
+
+    _api_version = 2
+    _min_disk = 'minDisk'
+    _min_ram = 'minRam'
+
+
+class FlavorsV2TestXML(FlavorsV2TestJSON):
     _interface = 'xml'
diff --git a/tempest/api/compute/v3/flavors/test_flavors.py b/tempest/api/compute/v3/flavors/test_flavors.py
deleted file mode 100644
index a0bbba6..0000000
--- a/tempest/api/compute/v3/flavors/test_flavors.py
+++ /dev/null
@@ -1,127 +0,0 @@
-# Copyright 2012 OpenStack Foundation
-# All Rights Reserved.
-#
-#    Licensed under the Apache License, Version 2.0 (the "License"); you may
-#    not use this file except in compliance with the License. You may obtain
-#    a copy of the License at
-#
-#         http://www.apache.org/licenses/LICENSE-2.0
-#
-#    Unless required by applicable law or agreed to in writing, software
-#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-#    License for the specific language governing permissions and limitations
-#    under the License.
-
-from tempest.api.compute import base
-from tempest import test
-
-
-class FlavorsV3Test(base.BaseV3ComputeTest):
-
-    @classmethod
-    def setUpClass(cls):
-        super(FlavorsV3Test, cls).setUpClass()
-        cls.client = cls.flavors_client
-
-    @test.attr(type='smoke')
-    def test_list_flavors(self):
-        # List of all flavors should contain the expected flavor
-        resp, flavors = self.client.list_flavors()
-        resp, flavor = self.client.get_flavor_details(self.flavor_ref)
-        flavor_min_detail = {'id': flavor['id'], 'links': flavor['links'],
-                             'name': flavor['name']}
-        self.assertIn(flavor_min_detail, flavors)
-
-    @test.attr(type='smoke')
-    def test_list_flavors_with_detail(self):
-        # Detailed list of all flavors should contain the expected flavor
-        resp, flavors = self.client.list_flavors_with_detail()
-        resp, flavor = self.client.get_flavor_details(self.flavor_ref)
-        self.assertIn(flavor, flavors)
-
-    @test.attr(type='smoke')
-    def test_get_flavor(self):
-        # The expected flavor details should be returned
-        resp, flavor = self.client.get_flavor_details(self.flavor_ref)
-        self.assertEqual(self.flavor_ref, flavor['id'])
-
-    @test.attr(type='gate')
-    def test_list_flavors_limit_results(self):
-        # Only the expected number of flavors should be returned
-        params = {'limit': 1}
-        resp, flavors = self.client.list_flavors(params)
-        self.assertEqual(1, len(flavors))
-
-    @test.attr(type='gate')
-    def test_list_flavors_detailed_limit_results(self):
-        # Only the expected number of flavors (detailed) should be returned
-        params = {'limit': 1}
-        resp, flavors = self.client.list_flavors_with_detail(params)
-        self.assertEqual(1, len(flavors))
-
-    @test.attr(type='gate')
-    def test_list_flavors_using_marker(self):
-        # The list of flavors should start from the provided marker
-        resp, flavors = self.client.list_flavors()
-        flavor_id = flavors[0]['id']
-
-        params = {'marker': flavor_id}
-        resp, flavors = self.client.list_flavors(params)
-        self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]),
-                         'The list of flavors did not start after the marker.')
-
-    @test.attr(type='gate')
-    def test_list_flavors_detailed_using_marker(self):
-        # The list of flavors should start from the provided marker
-        resp, flavors = self.client.list_flavors_with_detail()
-        flavor_id = flavors[0]['id']
-
-        params = {'marker': flavor_id}
-        resp, flavors = self.client.list_flavors_with_detail(params)
-        self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]),
-                         'The list of flavors did not start after the marker.')
-
-    @test.attr(type='gate')
-    def test_list_flavors_detailed_filter_by_min_disk(self):
-        # The detailed list of flavors should be filtered by disk space
-        resp, flavors = self.client.list_flavors_with_detail()
-        flavors = sorted(flavors, key=lambda k: k['disk'])
-        flavor_id = flavors[0]['id']
-
-        params = {'min_disk': flavors[0]['disk'] + 1}
-        resp, flavors = self.client.list_flavors_with_detail(params)
-        self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))
-
-    @test.attr(type='gate')
-    def test_list_flavors_detailed_filter_by_min_ram(self):
-        # The detailed list of flavors should be filtered by RAM
-        resp, flavors = self.client.list_flavors_with_detail()
-        flavors = sorted(flavors, key=lambda k: k['ram'])
-        flavor_id = flavors[0]['id']
-
-        params = {'min_ram': flavors[0]['ram'] + 1}
-        resp, flavors = self.client.list_flavors_with_detail(params)
-        self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))
-
-    @test.attr(type='gate')
-    def test_list_flavors_filter_by_min_disk(self):
-        # The list of flavors should be filtered by disk space
-        resp, flavors = self.client.list_flavors_with_detail()
-        flavors = sorted(flavors, key=lambda k: k['disk'])
-        flavor_id = flavors[0]['id']
-
-        params = {'min_disk': flavors[0]['disk'] + 1}
-        resp, flavors = self.client.list_flavors(params)
-        self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))
-
-    @test.attr(type='gate')
-    def test_list_flavors_filter_by_min_ram(self):
-        # The list of flavors should be filtered by RAM
-        resp, flavors = self.client.list_flavors_with_detail()
-        flavors = sorted(flavors, key=lambda k: k['ram'])
-        flavor_id = flavors[0]['id']
-
-        params = {'min_ram': flavors[0]['ram'] + 1}
-        resp, flavors = self.client.list_flavors(params)
-        self.assertFalse(any([i for i in flavors if i['id'] == flavor_id]))