From f8f2a333b9b28500338544b2432b8dbd2c413a14 Mon Sep 17 00:00:00 2001
From: Victoria Martinez de la Cruz <victoria@redhat.com>
Date: Wed, 24 Jun 2015 06:37:27 -0300
Subject: [PATCH] API v1.1 Claims endpoints

This change adds the endpoints for claims to the
persistent transport API.

DocImpact

blueprint persistent-transport

Change-Id: I6d9b8f288d62ab05f8a34f2b3e35782e78779e34
---
 zaqar/api/handler.py                          |   3 +
 zaqar/api/v1_1/endpoints.py                   | 187 ++++++++
 zaqar/common/api/utils.py                     |  13 +-
 zaqar/tests/unit/transport/websocket/base.py  |   1 +
 .../transport/websocket/v1_1/test_claims.py   | 434 ++++++++++++++++++
 5 files changed, 637 insertions(+), 1 deletion(-)
 create mode 100644 zaqar/tests/unit/transport/websocket/v1_1/test_claims.py

diff --git a/zaqar/api/handler.py b/zaqar/api/handler.py
index d3f1712f0..e957a24d0 100644
--- a/zaqar/api/handler.py
+++ b/zaqar/api/handler.py
@@ -70,3 +70,6 @@ class Handler(object):
 
         return request.Request(action=action, body=body,
                                headers=headers, api="v1.1")
+
+    def get_defaults(self):
+        return self.v1_1_endpoints._defaults
diff --git a/zaqar/api/v1_1/endpoints.py b/zaqar/api/v1_1/endpoints.py
index 1e86314a2..43de3a52e 100644
--- a/zaqar/api/v1_1/endpoints.py
+++ b/zaqar/api/v1_1/endpoints.py
@@ -538,3 +538,190 @@ class Endpoints(object):
         body = {'messages': messages}
 
         return response.Response(req, body, headers)
+
+    # Claims
+    @api_utils.raises_conn_error
+    def claim_create(self, req):
+        """Creates a claim
+
+        :param req: Request instance ready to be sent.
+        :type req: `api.common.Request`
+        :return: resp: Response instance
+        :type: resp: `api.common.Response`
+        """
+        project_id = req._headers.get('X-Project-ID')
+        queue_name = req._body.get('queue_name')
+
+        LOG.debug(u'Claims create - queue: %(queue)s, '
+                  u'project: %(project)s',
+                  {'queue': queue_name, 'project': project_id})
+
+        self._claim_post_spec = (
+            ('ttl', int, self._defaults.claim_ttl),
+            ('grace', int, self._defaults.claim_grace),
+        )
+
+        # Claim some messages
+
+        # NOTE(vkmc): We build a dict with the ttl and grace
+        # This is the metadata the storage is waiting for
+        kwargs = api_utils.get_headers(req)
+        # Read claim metadata (e.g., ttl) and raise appropriate
+        # errors as needed.
+        metadata = api_utils.sanitize(kwargs, self._claim_post_spec)
+
+        limit = (None if kwargs.get('limit') is None
+                 else kwargs.get('limit'))
+
+        claim_options = {} if limit is None else {'limit': limit}
+
+        try:
+            self._validate.claim_creation(metadata, limit=limit)
+        except (ValueError, validation.ValidationFailed) as ex:
+            LOG.debug(ex)
+            headers = {'status': 400}
+            return api_utils.error_response(req, ex, headers)
+
+        cid, msgs = self._claim_controller.create(
+            queue_name,
+            metadata=metadata,
+            project=project_id,
+            **claim_options)
+
+        # Buffer claimed messages
+        # TODO(vkmc): optimize, along with serialization (below)
+        resp_msgs = list(msgs)
+
+        # Serialize claimed messages, if any. This logic assumes
+        # the storage driver returned well-formed messages.
+        if len(resp_msgs) != 0:
+            resp_msgs = [api_utils.format_message(msg, cid)
+                         for msg in resp_msgs]
+
+            headers = {'status': 201}
+            body = {'claim_id': cid, 'messages': resp_msgs}
+        else:
+            headers = {'status': 204}
+            body = {'claim_id': cid}
+
+        return response.Response(req, body, headers)
+
+    @api_utils.raises_conn_error
+    def claim_get(self, req):
+        """Gets a claim
+
+        :param req: Request instance ready to be sent.
+        :type req: `api.common.Request`
+        :return: resp: Response instance
+        :type: resp: `api.common.Response`
+        """
+        project_id = req._headers.get('X-Project-ID')
+        queue_name = req._body.get('queue_name')
+        claim_id = req._body.get('claim_id')
+
+        LOG.debug(u'Claim get - claim: %(claim_id)s, '
+                  u'queue: %(queue_name)s, project: %(project_id)s',
+                  {'queue_name': queue_name,
+                   'project_id': project_id,
+                   'claim_id': claim_id})
+        try:
+            meta, msgs = self._claim_controller.get(
+                queue_name,
+                claim_id=claim_id,
+                project=project_id)
+
+            # Buffer claimed messages
+            # TODO(vkmc): Optimize along with serialization (see below)
+            meta['messages'] = list(msgs)
+        except storage_errors.DoesNotExist as ex:
+            LOG.debug(ex)
+            error = _('Claim %s does not exist.') % claim_id
+            headers = {'status': 404}
+            return api_utils.error_response(req, ex, headers, error)
+
+        # Serialize claimed messages
+        # TODO(vkmc): Optimize
+        meta['messages'] = [api_utils.format_message(msg, claim_id)
+                            for msg in meta['messages']]
+
+        del meta['id']
+
+        headers = {'status': 200}
+        body = meta
+
+        return response.Response(req, body, headers)
+
+    @api_utils.raises_conn_error
+    def claim_update(self, req):
+        """Updates a claim
+
+        :param req: Request instance ready to be sent.
+        :type req: `api.common.Request`
+        :return: resp: Response instance
+        :type: resp: `api.common.Response`
+        """
+        project_id = req._headers.get('X-Project-ID')
+        queue_name = req._body.get('queue_name')
+        claim_id = req._body.get('claim_id')
+
+        LOG.debug(u'Claim update - claim: %(claim_id)s, '
+                  u'queue: %(queue_name)s, project:%(project_id)s' %
+                  {'queue_name': queue_name,
+                   'project_id': project_id,
+                   'claim_id': claim_id})
+
+        self._claim_patch_spec = (
+            ('ttl', int, self._defaults.claim_ttl),
+            ('grace', int, self._defaults.claim_grace),
+        )
+
+        # Read claim metadata (e.g., TTL) and raise appropriate
+        # HTTP errors as needed.
+        metadata = api_utils.sanitize(req._body, self._claim_patch_spec)
+
+        try:
+            self._validate.claim_updating(metadata)
+            self._claim_controller.update(queue_name,
+                                          claim_id=claim_id,
+                                          metadata=metadata,
+                                          project=project_id)
+            headers = {'status': 204}
+            body = _('Claim %s updated.') % claim_id
+            return response.Response(req, body, headers)
+        except validation.ValidationFailed as ex:
+            LOG.debug(ex)
+            headers = {'status': 400}
+            return api_utils.error_response(req, ex, headers)
+        except storage_errors.DoesNotExist as ex:
+            LOG.debug(ex)
+            error = _('Claim %s does not exist.') % claim_id
+            headers = {'status': 404}
+            return api_utils.error_response(req, ex, headers, error)
+
+    @api_utils.raises_conn_error
+    def claim_delete(self, req):
+        """Deletes a claim
+
+        :param req: Request instance ready to be sent.
+        :type req: `api.common.Request`
+        :return: resp: Response instance
+        :type: resp: `api.common.Response`
+        """
+        project_id = req._headers.get('X-Project-ID')
+        queue_name = req._body.get('queue_name')
+        claim_id = req._body.get('claim_id')
+
+        LOG.debug(u'Claim delete - claim: %(claim_id)s, '
+                  u'queue: %(queue_name)s, project: %(project_id)s' %
+                  {'queue_name': queue_name,
+                   'project_id': project_id,
+                   'claim_id': claim_id})
+
+        self._claim_controller.delete(queue_name,
+                                      claim_id=claim_id,
+                                      project=project_id)
+
+        headers = {'status': 204}
+        body = _('Claim %s deleted.') % claim_id
+
+        return response.Response(req, body, headers)
diff --git a/zaqar/common/api/utils.py b/zaqar/common/api/utils.py
index 6f1e2bf0d..9b7d9830c 100644
--- a/zaqar/common/api/utils.py
+++ b/zaqar/common/api/utils.py
@@ -149,6 +149,10 @@ def get_client_uuid(req):
 def get_headers(req):
     kwargs = {}
 
+    # TODO(vkmc) We should add a control here to make sure
+    # that the headers/request combination is possible
+    # e.g. we cannot have messages_post with grace
+
     if req._body.get('marker') is not None:
         kwargs['marker'] = req._body.get('marker')
 
@@ -166,6 +170,12 @@ def get_headers(req):
         kwargs['include_claimed'] = strutils.bool_from_string(
             req._body.get('include_claimed'))
 
+    if req._body.get('ttl') is not None:
+        kwargs['ttl'] = int(req._body.get('ttl'))
+
+    if req._body.get('grace') is not None:
+        kwargs['grace'] = int(req._body.get('grace'))
+
     return kwargs
 
 
@@ -196,9 +206,10 @@ def error_response(req, exception, headers=None, error=None):
     return resp
 
 
-def format_message(message):
+def format_message(message, claim_id=None):
     return {
         'id': message['id'],
+        'claim_id': claim_id,
         'ttl': message['ttl'],
         'age': message['age'],
         'body': message['body'],
diff --git a/zaqar/tests/unit/transport/websocket/base.py b/zaqar/tests/unit/transport/websocket/base.py
index c4ac561f1..3792eae08 100644
--- a/zaqar/tests/unit/transport/websocket/base.py
+++ b/zaqar/tests/unit/transport/websocket/base.py
@@ -45,6 +45,7 @@ class TestBase(testing.TestBase):
         self.boot = bootstrap.Bootstrap(self.conf)
 
         self.transport = self.boot.transport
+        self.api = self.boot.api
 
     def tearDown(self):
         if self.conf.pooling:
diff --git a/zaqar/tests/unit/transport/websocket/v1_1/test_claims.py b/zaqar/tests/unit/transport/websocket/v1_1/test_claims.py
new file mode 100644
index 000000000..fb691097d
--- /dev/null
+++ b/zaqar/tests/unit/transport/websocket/v1_1/test_claims.py
@@ -0,0 +1,434 @@
+# Copyright (c) 2015 Red Hat, Inc.
+#
+# 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.
+
+import json
+import uuid
+
+import ddt
+import mock
+from oslo_utils import timeutils
+
+from zaqar.tests.unit.transport.websocket import base
+from zaqar.tests.unit.transport.websocket import utils as test_utils
+
+
+@ddt.ddt
+class ClaimsBaseTest(base.V1_1Base):
+
+    config_file = "websocket_mongodb.conf"
+
+    def setUp(self):
+        super(ClaimsBaseTest, self).setUp()
+        self.protocol = self.transport.factory()
+        self.defaults = self.api.get_defaults()
+
+        self.project_id = '7e55e1a7e'
+        self.headers = {
+            'Client-ID': str(uuid.uuid4()),
+            'X-Project-ID': self.project_id
+        }
+
+        action = "queue_create"
+        body = {"queue_name": "skittle"}
+        req = test_utils.create_request(action, body, self.headers)
+
+        with mock.patch.object(self.protocol, 'sendMessage') as msg_mock:
+            self.protocol.onMessage(req, False)
+            resp = json.loads(msg_mock.call_args[0][0])
+            self.assertEqual(resp['headers']['status'], 201)
+
+        action = "message_post"
+        body = {"queue_name": "skittle",
+                "messages": [
+                    {'body': 239, 'ttl': 300},
+                    {'body': {'key_1': 'value_1'}, 'ttl': 300},
+                    {'body': [1, 3], 'ttl': 300},
+                    {'body': 439, 'ttl': 300},
+                    {'body': {'key_2': 'value_2'}, 'ttl': 300},
+                    {'body': ['a', 'b'], 'ttl': 300},
+                    {'body': 639, 'ttl': 300},
+                    {'body': {'key_3': 'value_3'}, 'ttl': 300},
+                    {'body': ["aa", "bb"], 'ttl': 300}]
+                }
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+
+        self.protocol.onMessage(req, False)
+
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 201)
+
+    def tearDown(self):
+        super(ClaimsBaseTest, self).tearDown()
+        action = 'queue_delete'
+        body = {'queue_name': 'skittle'}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 204)
+
+    @ddt.data('[', '[]', '.', '"fail"')
+    def test_bad_claim(self, doc):
+        action = "claim_create"
+        body = doc
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 400)
+
+        action = "claim_update"
+        body = doc
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 400)
+
+    def test_exceeded_claim(self):
+        action = "claim_create"
+        body = {"queue_name": "skittle",
+                "ttl": 100,
+                "grace": 60,
+                "limit": 21}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 400)
+
+    @ddt.data((-1, -1), (59, 60), (60, 59), (60, 43201), (43201, 60))
+    def test_unacceptable_ttl_or_grace(self, ttl_grace):
+        ttl, grace = ttl_grace
+        action = "claim_create"
+        body = {"queue_name": "skittle",
+                "ttl": ttl,
+                "grace": grace}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 400)
+
+    @ddt.data(-1, 59, 43201)
+    def test_unacceptable_new_ttl(self, ttl):
+        claim = self._get_a_claim()
+
+        action = "claim_update"
+        body = {"queue_name": "skittle",
+                "claim_id": claim['body']['claim_id'],
+                "ttl": ttl}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 400)
+
+    def test_default_ttl_and_grace(self):
+        action = "claim_create"
+        body = {"queue_name": "skittle"}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 201)
+
+        action = "claim_get"
+        body = {"queue_name": "skittle",
+                "claim_id": resp['body']['claim_id']}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+
+        self.assertEqual(resp['headers']['status'], 200)
+        self.assertEqual(self.defaults.claim_ttl, resp['body']['ttl'])
+
+    def test_lifecycle(self):
+        # First, claim some messages
+        action = "claim_create"
+        body = {"queue_name": "skittle",
+                "ttl": 100,
+                "grace": 60}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 201)
+        claimed_messages = resp['body']['messages']
+        claim_id = resp['body']['claim_id']
+
+        # No more messages to claim
+        body = {"queue_name": "skittle",
+                "ttl": 100,
+                "grace": 60}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 204)
+
+        # Listing messages, by default, won't include claimed, will echo
+        action = "message_list"
+        body = {"queue_name": "skittle",
+                "echo": True}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+        self.assertEqual(resp['body']['messages'], [])
+
+        # Listing messages, by default, won't include claimed, won't echo
+
+        body = {"queue_name": "skittle",
+                "echo": False}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+        self.assertEqual(resp['body']['messages'], [])
+
+        # List messages, include_claimed, but don't echo
+
+        body = {"queue_name": "skittle",
+                "include_claimed": True,
+                "echo": False}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+        self.assertEqual(resp['body']['messages'], [])
+
+        # List messages with a different client-id and echo=false.
+        # Should return some messages
+
+        body = {"queue_name": "skittle",
+                "echo": False}
+
+        headers = {
+            'Client-ID': str(uuid.uuid4()),
+            'X-Project-ID': self.project_id
+        }
+
+        req = test_utils.create_request(action, body, headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+
+        # Include claimed messages this time, and echo
+
+        body = {"queue_name": "skittle",
+                "include_claimed": True,
+                "echo": True}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+        self.assertEqual(len(resp['body']['messages']), len(claimed_messages))
+
+        message_id_1 = resp['body']['messages'][0]['id']
+        message_id_2 = resp['body']['messages'][1]['id']
+
+        # Try to delete the message without submitting a claim_id
+        action = "message_delete"
+        body = {"queue_name": "skittle",
+                "message_id": message_id_1}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 403)
+
+        # Delete the message and its associated claim
+        body = {"queue_name": "skittle",
+                "message_id": message_id_1,
+                "claim_id": claim_id}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 204)
+
+        # Try to get it from the wrong project
+        headers = {
+            'Client-ID': str(uuid.uuid4()),
+            'X-Project-ID': 'someproject'
+        }
+
+        action = "message_get"
+        body = {"queue_name": "skittle",
+                "message_id": message_id_2}
+        req = test_utils.create_request(action, body, headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 404)
+
+        # Get the message
+        action = "message_get"
+        body = {"queue_name": "skittle",
+                "message_id": message_id_2}
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+
+        # Update the claim
+        creation = timeutils.utcnow()
+        action = "claim_update"
+        body = {"queue_name": "skittle",
+                "ttl": 60,
+                "grace": 60,
+                "claim_id": claim_id}
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 204)
+
+        # Get the claimed messages (again)
+        action = "claim_get"
+        body = {"queue_name": "skittle",
+                "claim_id": claim_id}
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        query = timeutils.utcnow()
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+        self.assertEqual(resp['body']['ttl'], 60)
+
+        message_id_3 = resp['body']['messages'][0]['id']
+
+        estimated_age = timeutils.delta_seconds(creation, query)
+        self.assertTrue(estimated_age > resp['body']['age'])
+
+        # Delete the claim
+        action = "claim_delete"
+        body = {"queue_name": "skittle",
+                "claim_id": claim_id}
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 204)
+
+        # Try to delete a message with an invalid claim ID
+        action = "message_delete"
+        body = {"queue_name": "skittle",
+                "message_id": message_id_3,
+                "claim_id": claim_id}
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 400)
+
+        # Make sure it wasn't deleted!
+        action = "message_get"
+        body = {"queue_name": "skittle",
+                "message_id": message_id_2}
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 200)
+
+        # Try to get a claim that doesn't exist
+        action = "claim_get"
+        body = {"queue_name": "skittle",
+                "claim_id": claim_id}
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 404)
+
+        # Try to update a claim that doesn't exist
+        action = "claim_update"
+        body = {"queue_name": "skittle",
+                "ttl": 60,
+                "grace": 60,
+                "claim_id": claim_id}
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 404)
+
+    def test_post_claim_nonexistent_queue(self):
+        action = "claim_create"
+        body = {"queue_name": "nonexistent",
+                "ttl": 100,
+                "grace": 60}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 204)
+
+    def test_get_claim_nonexistent_queue(self):
+        action = "claim_get"
+        body = {"queue_name": "nonexistent",
+                "claim_id": "aaabbbba"}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 404)
+
+    def _get_a_claim(self):
+        action = "claim_create"
+        body = {"queue_name": "skittle",
+                "ttl": 100,
+                "grace": 60}
+
+        send_mock = mock.Mock()
+        self.protocol.sendMessage = send_mock
+
+        req = test_utils.create_request(action, body, self.headers)
+        self.protocol.onMessage(req, False)
+        resp = json.loads(send_mock.call_args[0][0])
+        self.assertEqual(resp['headers']['status'], 201)
+
+        return resp