Support generalized resource filter in client

Introduce new command 'list-filters' to retrieve
enabled resource filters.

```
command: cinder list-filters --resource=volume

output:
+----------------+-------------------------------+
| Resource       | Filters                       |
+----------------+-------------------------------+
| volume         | name, status, image_metadata  |
+----------------+-------------------------------+

```

Also Added new option '--filters' to these list commands:
1. list
2. snapshot-list
3. backup-list
4. attachment-list
5. message-list
6. group-list
7. group-snapshot-list
8. get-pools

Change-Id: I062e6227342ea0d940a8333e84014969c33b49df
Partial: blueprint generalized-filtering-for-cinder-list-resource
Depends-On: 04bd22c1eb371805a3ce9f6c8915325bc0da2d36
Depends-On: 7fdc4688fea373afb85d929e649d311568d1855a

1 files changed, 17 insertions, 0 deletions

diff --git a/cinderclient/tests/unit/test_utils.py b/cinderclient/tests/unit/test_utils.py
index a62425e..eeb4800 100644
--- a/cinderclient/tests/unit/test_utils.py
+++ b/cinderclient/tests/unit/test_utils.py
@@ -12,6 +12,7 @@
 # limitations under the License.
 
 import collections
+import ddt
 import sys
 
 import mock
@@ -21,6 +22,7 @@ import six
 from cinderclient import api_versions
 from cinderclient.apiclient import base as common_base
 from cinderclient import exceptions
+from cinderclient import shell_utils
 from cinderclient import utils
 from cinderclient import base
 from cinderclient.tests.unit import utils as test_utils
@@ -187,6 +189,21 @@ class BuildQueryParamTestCase(test_utils.TestCase):
         self.assertFalse(result_2)
 
 
+@ddt.ddt
+class ExtractFilterTestCase(test_utils.TestCase):
+
+    @ddt.data({'content': ['key1=value1'],
+               'expected': {'key1': 'value1'}},
+              {'content': ['key1={key2:value2}'],
+               'expected': {'key1': {'key2': 'value2'}}},
+              {'content': ['key1=value1', 'key2={key22:value22}'],
+               'expected': {'key1': 'value1', 'key2': {'key22': 'value22'}}})
+    @ddt.unpack
+    def test_extract_filters(self, content, expected):
+        result = shell_utils.extract_filters(content)
+        self.assertEqual(expected, result)
+
+
 class PrintListTestCase(test_utils.TestCase):
 
     def test_print_list_with_list(self):