Explicit set capabilities in VolumeDetail and SnapshotDetail

VolumeDetail and SnapshotDetail classes inherit the capability
attributes of their parent classes, ie Volume and Snapshot, but their
`base_path` only supports listing instances, unlike their parent
classes, so explicitly set all capability attributes to `False` except
for `allow_list`.

Story: 2004226
Task: 27746
Change-Id: I001f19093bcf6e5eb18c15d7e1dab8c0f723e04b

openstack/block_storage/v2/snapshot.py

@@ -57,6 +57,13 @@ class SnapshotDetail(Snapshot):
 
     base_path = "/snapshots/detail"
 
+    # capabilities
+    allow_fetch = False
+    allow_create = False
+    allow_delete = False
+    allow_commit = False
+    allow_list = True
+
     #: The percentage of completeness the snapshot is currently at.
     progress = resource.Body("os-extended-snapshot-attributes:progress")
     #: The project ID this snapshot is associated with.

openstack/block_storage/v2/volume.py

@@ -94,6 +94,13 @@ class VolumeDetail(Volume):
 
     base_path = "/volumes/detail"
 
+    # capabilities
+    allow_fetch = False
+    allow_create = False
+    allow_delete = False
+    allow_commit = False
+    allow_list = True
+
     #: The volume's current back-end.
     host = resource.Body("os-vol-host-attr:host")
     #: The project ID associated with current back-end.

openstack/tests/unit/block_storage/v2/test_snapshot.py

@@ -77,6 +77,11 @@ class TestSnapshotDetail(base.TestCase):
         sot = snapshot.SnapshotDetail(DETAILED_SNAPSHOT)
         self.assertIsInstance(sot, snapshot.Snapshot)
         self.assertEqual("/snapshots/detail", sot.base_path)
+        self.assertFalse(sot.allow_fetch)
+        self.assertFalse(sot.allow_commit)
+        self.assertFalse(sot.allow_create)
+        self.assertFalse(sot.allow_delete)
+        self.assertTrue(sot.allow_list)
 
     def test_create_detailed(self):
         sot = snapshot.SnapshotDetail(**DETAILED_SNAPSHOT)

openstack/tests/unit/block_storage/v2/test_volume.py

@@ -126,6 +126,11 @@ class TestVolumeDetail(base.TestCase):
         sot = volume.VolumeDetail(VOLUME_DETAIL)
         self.assertIsInstance(sot, volume.Volume)
         self.assertEqual("/volumes/detail", sot.base_path)
+        self.assertFalse(sot.allow_fetch)
+        self.assertFalse(sot.allow_commit)
+        self.assertFalse(sot.allow_create)
+        self.assertFalse(sot.allow_delete)
+        self.assertTrue(sot.allow_list)
 
     def test_create(self):
         sot = volume.VolumeDetail(**VOLUME_DETAIL)