diff --git a/etc/schemas/compute/flavors/flavor_details.json b/etc/schemas/compute/flavors/flavor_details.json
new file mode 100644
index 0000000..d1c1077
--- /dev/null
+++ b/etc/schemas/compute/flavors/flavor_details.json
@@ -0,0 +1,6 @@
+{
+    "name": "get-flavor-details",
+    "http-method": "GET",
+    "url": "flavors/%s",
+    "resources": ["flavor"]
+}
diff --git a/etc/schemas/compute/flavors/flavors_list.json b/etc/schemas/compute/flavors/flavors_list.json
new file mode 100644
index 0000000..eb8383b
--- /dev/null
+++ b/etc/schemas/compute/flavors/flavors_list.json
@@ -0,0 +1,24 @@
+{
+    "name": "list-flavors-with-detail",
+    "http-method": "GET",
+    "url": "flavors/detail",
+    "json-schema": {
+        "type": "object",
+        "properties": {
+            "minRam": {
+                "type": "integer",
+                "results": {
+                    "gen_none": 400,
+                    "gen_string": 400
+                }
+            },
+            "minDisk": {
+                "type": "integer",
+                "results": {
+                    "gen_none": 400,
+                    "gen_string": 400
+                }
+            }
+        }
+    }
+}
diff --git a/etc/schemas/compute/servers/get_console_output.json b/etc/schemas/compute/servers/get_console_output.json
new file mode 100644
index 0000000..7c3860f
--- /dev/null
+++ b/etc/schemas/compute/servers/get_console_output.json
@@ -0,0 +1,21 @@
+{
+    "name": "get-console-output",
+    "http-method": "POST",
+    "url": "servers/%s/action",
+    "resources": ["server"],
+    "json-schema": {
+        "type": "object",
+        "properties": {
+            "os-getConsoleOutput": {
+                "type": "object",
+                "properties": {
+                    "length": {
+                        "type": ["integer", "string"],
+                        "minimum": 0
+                    }
+                }
+            }
+        },
+        "additionalProperties": false
+    }
+}
diff --git a/tempest/api/compute/flavors/test_flavors_negative.py b/tempest/api/compute/flavors/test_flavors_negative.py
index 7474996..8ac6182 100644
--- a/tempest/api/compute/flavors/test_flavors_negative.py
+++ b/tempest/api/compute/flavors/test_flavors_negative.py
@@ -13,40 +13,42 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import uuid
+import testscenarios
 
 from tempest.api.compute import base
-from tempest import exceptions
-from tempest.test import attr
+from tempest import test
 
 
-class FlavorsNegativeTestJSON(base.BaseV2ComputeTest):
+load_tests = testscenarios.load_tests_apply_scenarios
+
+
+class FlavorsListNegativeTestJSON(base.BaseV2ComputeTest,
+                                  test.NegativeAutoTest):
     _interface = 'json'
+    _service = 'compute'
+    _schema_file = 'compute/flavors/flavors_list.json'
+
+    scenarios = test.NegativeAutoTest.generate_scenario(_schema_file)
+
+    @test.attr(type=['negative', 'gate'])
+    def test_list_flavors_with_detail(self):
+        self.execute(self._schema_file)
+
+
+class FlavorDetailsNegativeTestJSON(base.BaseV2ComputeTest,
+                                    test.NegativeAutoTest):
+    _interface = 'json'
+    _service = 'compute'
+    _schema_file = 'compute/flavors/flavor_details.json'
+
+    scenarios = test.NegativeAutoTest.generate_scenario(_schema_file)
 
     @classmethod
     def setUpClass(cls):
-        super(FlavorsNegativeTestJSON, cls).setUpClass()
-        cls.client = cls.flavors_client
+        super(FlavorDetailsNegativeTestJSON, cls).setUpClass()
+        cls.set_resource("flavor", cls.flavor_ref)
 
-    @attr(type=['negative', 'gate'])
-    def test_invalid_minRam_filter(self):
-        self.assertRaises(exceptions.BadRequest,
-                          self.client.list_flavors_with_detail,
-                          {'minRam': 'invalid'})
-
-    @attr(type=['negative', 'gate'])
-    def test_invalid_minDisk_filter(self):
-        self.assertRaises(exceptions.BadRequest,
-                          self.client.list_flavors_with_detail,
-                          {'minDisk': 'invalid'})
-
-    @attr(type=['negative', 'gate'])
-    def test_non_existent_flavor_id(self):
+    @test.attr(type=['negative', 'gate'])
+    def test_get_flavor_details(self):
         # flavor details are not returned for non-existent flavors
-        nonexistent_flavor_id = str(uuid.uuid4())
-        self.assertRaises(exceptions.NotFound, self.client.get_flavor_details,
-                          nonexistent_flavor_id)
-
-
-class FlavorsNegativeTestXML(FlavorsNegativeTestJSON):
-    _interface = 'xml'
+        self.execute(self._schema_file)
diff --git a/tempest/api/compute/flavors/test_flavors_negative_xml.py b/tempest/api/compute/flavors/test_flavors_negative_xml.py
new file mode 100644
index 0000000..c93c7c9
--- /dev/null
+++ b/tempest/api/compute/flavors/test_flavors_negative_xml.py
@@ -0,0 +1,48 @@
+# Copyright 2013 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.
+
+import uuid
+
+from tempest.api.compute import base
+from tempest import exceptions
+from tempest.test import attr
+
+
+class FlavorsNegativeTestXML(base.BaseV2ComputeTest):
+    _interface = 'xml'
+
+    @classmethod
+    def setUpClass(cls):
+        super(FlavorsNegativeTestXML, cls).setUpClass()
+        cls.client = cls.flavors_client
+
+    @attr(type=['negative', 'gate'])
+    def test_invalid_minRam_filter(self):
+        self.assertRaises(exceptions.BadRequest,
+                          self.client.list_flavors_with_detail,
+                          {'minRam': 'invalid'})
+
+    @attr(type=['negative', 'gate'])
+    def test_invalid_minDisk_filter(self):
+        self.assertRaises(exceptions.BadRequest,
+                          self.client.list_flavors_with_detail,
+                          {'minDisk': 'invalid'})
+
+    @attr(type=['negative', 'gate'])
+    def test_non_existent_flavor_id(self):
+        # flavor details are not returned for non-existent flavors
+        nonexistent_flavor_id = str(uuid.uuid4())
+        self.assertRaises(exceptions.NotFound, self.client.get_flavor_details,
+                          nonexistent_flavor_id)
diff --git a/tempest/api/compute/servers/test_servers_negative_new.py b/tempest/api/compute/servers/test_servers_negative_new.py
new file mode 100644
index 0000000..2b2fcf1
--- /dev/null
+++ b/tempest/api/compute/servers/test_servers_negative_new.py
@@ -0,0 +1,41 @@
+# Copyright 2014 Red Hat, Inc & Deutsche Telekom AG
+# 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.
+
+import testscenarios
+
+from tempest.api.compute import base
+from tempest import test
+
+
+load_tests = testscenarios.load_tests_apply_scenarios
+
+
+class GetConsoleOutputNegativeTestJSON(base.BaseV2ComputeTest,
+                                       test.NegativeAutoTest):
+    _interface = 'json'
+    _service = 'compute'
+    _schema_file = 'compute/servers/get_console_output.json'
+
+    scenarios = test.NegativeAutoTest.generate_scenario(_schema_file)
+
+    @classmethod
+    def setUpClass(cls):
+        super(GetConsoleOutputNegativeTestJSON, cls).setUpClass()
+        _resp, server = cls.create_test_server()
+        cls.set_resource("server", server['id'])
+
+    @test.attr(type=['negative', 'gate'])
+    def test_get_console_output(self):
+        self.execute(self._schema_file)
diff --git a/tempest/clients.py b/tempest/clients.py
index 797185a..f8361af 100644
--- a/tempest/clients.py
+++ b/tempest/clients.py
@@ -13,6 +13,7 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
+from tempest.common.rest_client import NegativeRestClient
 from tempest import config
 from tempest import exceptions
 from tempest.openstack.common import log as logging
@@ -174,7 +175,7 @@
     """
 
     def __init__(self, username=None, password=None, tenant_name=None,
-                 interface='json'):
+                 interface='json', service=None):
         """
         We allow overriding of the credentials used within the various
         client classes managed by the Manager object. Left as None, the
@@ -323,10 +324,15 @@
             self.hosts_v3_client = HostsV3ClientJSON(*client_args)
             if CONF.service_available.ceilometer:
                 self.telemetry_client = TelemetryClientJSON(*client_args)
+            self.negative_client = NegativeRestClient(*client_args)
+            self.negative_client.service = service
 
             if client_args_v3_auth:
                 self.servers_client_v3_auth = ServersClientJSON(
                     *client_args_v3_auth)
+                self.negative_v3_client = NegativeRestClient(
+                    *client_args_v3_auth)
+                self.negative_v3_client.service = service
         else:
             msg = "Unsupported interface type `%s'" % interface
             raise exceptions.InvalidConfiguration(msg)
@@ -354,11 +360,12 @@
     managed client objects
     """
 
-    def __init__(self, interface='json'):
+    def __init__(self, interface='json', service=None):
         super(AltManager, self).__init__(CONF.identity.alt_username,
                                          CONF.identity.alt_password,
                                          CONF.identity.alt_tenant_name,
-                                         interface=interface)
+                                         interface=interface,
+                                         service=service)
 
 
 class AdminManager(Manager):
@@ -368,11 +375,12 @@
     managed client objects
     """
 
-    def __init__(self, interface='json'):
+    def __init__(self, interface='json', service=None):
         super(AdminManager, self).__init__(CONF.identity.admin_username,
                                            CONF.identity.admin_password,
                                            CONF.identity.admin_tenant_name,
-                                           interface=interface)
+                                           interface=interface,
+                                           service=service)
 
 
 class ComputeAdminManager(Manager):
@@ -382,12 +390,13 @@
     managed client objects
     """
 
-    def __init__(self, interface='json'):
+    def __init__(self, interface='json', service=None):
         base = super(ComputeAdminManager, self)
         base.__init__(CONF.compute_admin.username,
                       CONF.compute_admin.password,
                       CONF.compute_admin.tenant_name,
-                      interface=interface)
+                      interface=interface,
+                      service=service)
 
 
 class OrchestrationManager(Manager):
@@ -395,9 +404,10 @@
     Manager object that uses the admin credentials for its
     so that heat templates can create users
     """
-    def __init__(self, interface='json'):
+    def __init__(self, interface='json', service=None):
         base = super(OrchestrationManager, self)
         base.__init__(CONF.identity.admin_username,
                       CONF.identity.admin_password,
                       CONF.identity.tenant_name,
-                      interface=interface)
+                      interface=interface,
+                      service=service)
diff --git a/tempest/common/generate_json.py b/tempest/common/generate_json.py
new file mode 100644
index 0000000..0a0afe4
--- /dev/null
+++ b/tempest/common/generate_json.py
@@ -0,0 +1,239 @@
+# Copyright 2014 Red Hat, Inc. & Deutsche Telekom AG
+# 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.
+
+import copy
+import jsonschema
+
+from tempest.openstack.common import log as logging
+
+LOG = logging.getLogger(__name__)
+
+
+def generate_valid(schema):
+    """
+    Create a valid dictionary based on the types in a json schema.
+    """
+    LOG.debug("generate_valid: %s" % schema)
+    schema_type = schema["type"]
+    if isinstance(schema_type, list):
+        # Just choose the first one since all are valid.
+        schema_type = schema_type[0]
+    return type_map_valid[schema_type](schema)
+
+
+def generate_valid_string(schema):
+    size = schema.get("minLength", 0)
+    # TODO(dkr mko): handle format and pattern
+    return "x" * size
+
+
+def generate_valid_integer(schema):
+    # TODO(dkr mko): handle multipleOf
+    if "minimum" in schema:
+        minimum = schema["minimum"]
+        if "exclusiveMinimum" not in schema:
+            return minimum
+        else:
+            return minimum + 1
+    if "maximum" in schema:
+        maximum = schema["maximum"]
+        if "exclusiveMaximum" not in schema:
+            return maximum
+        else:
+            return maximum - 1
+    return 0
+
+
+def generate_valid_object(schema):
+    obj = {}
+    for k, v in schema["properties"].iteritems():
+        obj[k] = generate_valid(v)
+    return obj
+
+
+def generate_invalid(schema):
+    """
+    Generate an invalid json dictionary based on a schema.
+    Only one value is mis-generated for each dictionary created.
+
+    Any generator must return a list of tuples or a single tuple.
+    The values of this tuple are:
+      result[0]: Name of the test
+      result[1]: json schema for the test
+      result[2]: expected result of the test (can be None)
+    """
+    LOG.debug("generate_invalid: %s" % schema)
+    schema_type = schema["type"]
+    if isinstance(schema_type, list):
+        if "integer" in schema_type:
+            schema_type = "integer"
+        else:
+            raise Exception("non-integer list types not supported")
+    result = []
+    for generator in type_map_invalid[schema_type]:
+        ret = generator(schema)
+        if ret is not None:
+            if isinstance(ret, list):
+                result.extend(ret)
+            elif isinstance(ret, tuple):
+                result.append(ret)
+            else:
+                raise Exception("generator (%s) returns invalid result"
+                                % generator)
+    LOG.debug("result: %s" % result)
+    return result
+
+
+def _check_for_expected_result(name, schema):
+    expected_result = None
+    if "results" in schema:
+        if name in schema["results"]:
+            expected_result = schema["results"][name]
+    return expected_result
+
+
+def generator(fn):
+    """
+    Decorator for simple generators that simply return one value
+    """
+    def wrapped(schema):
+        result = fn(schema)
+        if result is not None:
+            expected_result = _check_for_expected_result(fn.__name__, schema)
+            return (fn.__name__, result, expected_result)
+        return
+    return wrapped
+
+
+@generator
+def gen_int(_):
+    return 4
+
+
+@generator
+def gen_string(_):
+    return "XXXXXX"
+
+
+def gen_none(schema):
+    # Note(mkoderer): it's not using the decorator otherwise it'd be filtered
+    expected_result = _check_for_expected_result('gen_none', schema)
+    return ('gen_none', None, expected_result)
+
+
+@generator
+def gen_str_min_length(schema):
+    min_length = schema.get("minLength", 0)
+    if min_length > 0:
+        return "x" * (min_length - 1)
+
+
+@generator
+def gen_str_max_length(schema):
+    max_length = schema.get("maxLength", -1)
+    if max_length > -1:
+        return "x" * (max_length + 1)
+
+
+@generator
+def gen_int_min(schema):
+    if "minimum" in schema:
+        minimum = schema["minimum"]
+        if "exclusiveMinimum" not in schema:
+            minimum -= 1
+        return minimum
+
+
+@generator
+def gen_int_max(schema):
+    if "maximum" in schema:
+        maximum = schema["maximum"]
+        if "exclusiveMaximum" not in schema:
+            maximum += 1
+        return maximum
+
+
+def gen_obj_remove_attr(schema):
+    invalids = []
+    valid = generate_valid(schema)
+    required = schema.get("required", [])
+    for r in required:
+        new_valid = copy.deepcopy(valid)
+        del new_valid[r]
+        invalids.append(("gen_obj_remove_attr", new_valid, None))
+    return invalids
+
+
+@generator
+def gen_obj_add_attr(schema):
+    valid = generate_valid(schema)
+    if not schema.get("additionalProperties", True):
+        new_valid = copy.deepcopy(valid)
+        new_valid["$$$$$$$$$$"] = "xxx"
+        return new_valid
+
+
+def gen_inv_prop_obj(schema):
+    LOG.debug("generate_invalid_object: %s" % schema)
+    valid = generate_valid(schema)
+    invalids = []
+    properties = schema["properties"]
+
+    for k, v in properties.iteritems():
+        for invalid in generate_invalid(v):
+            LOG.debug(v)
+            new_valid = copy.deepcopy(valid)
+            new_valid[k] = invalid[1]
+            name = "prop_%s_%s" % (k, invalid[0])
+            invalids.append((name, new_valid, invalid[2]))
+
+    LOG.debug("generate_invalid_object return: %s" % invalids)
+    return invalids
+
+
+type_map_valid = {"string": generate_valid_string,
+                  "integer": generate_valid_integer,
+                  "object": generate_valid_object}
+
+type_map_invalid = {"string": [gen_int,
+                               gen_none,
+                               gen_str_min_length,
+                               gen_str_max_length],
+                    "integer": [gen_string,
+                                gen_none,
+                                gen_int_min,
+                                gen_int_max],
+                    "object": [gen_obj_remove_attr,
+                               gen_obj_add_attr,
+                               gen_inv_prop_obj]}
+
+schema = {"type": "object",
+          "properties":
+          {"name": {"type": "string"},
+           "http-method": {"enum": ["GET", "PUT", "HEAD",
+                                    "POST", "PATCH", "DELETE", 'COPY']},
+           "url": {"type": "string"},
+           "json-schema": jsonschema._utils.load_schema("draft4"),
+           "resources": {"type": "array", "items": {"type": "string"}},
+           "results": {"type": "object",
+                       "properties": {}}
+           },
+          "required": ["name", "http-method", "url"],
+          "additionalProperties": False,
+          }
+
+
+def validate_negative_test_schema(nts):
+    jsonschema.validate(nts, schema)
diff --git a/tempest/common/rest_client.py b/tempest/common/rest_client.py
index 8d07545..dd6e730 100644
--- a/tempest/common/rest_client.py
+++ b/tempest/common/rest_client.py
@@ -559,3 +559,33 @@
                 'retry-after' not in resp):
             return True
         return 'exceed' in resp_body.get('message', 'blabla')
+
+
+class NegativeRestClient(RestClient):
+    """
+    Version of RestClient that does not raise exceptions.
+    """
+    def _error_checker(self, method, url,
+                       headers, body, resp, resp_body):
+        pass
+
+    def send_request(self, method, url_template, resources, body=None):
+        url = url_template % tuple(resources)
+        if method == "GET":
+            resp, body = self.get(url)
+        elif method == "POST":
+            resp, body = self.post(url, body, self.headers)
+        elif method == "PUT":
+            resp, body = self.put(url, body, self.headers)
+        elif method == "PATCH":
+            resp, body = self.patch(url, body, self.headers)
+        elif method == "HEAD":
+            resp, body = self.head(url)
+        elif method == "DELETE":
+            resp, body = self.delete(url)
+        elif method == "COPY":
+            resp, body = self.copy(url)
+        else:
+            assert False
+
+        return resp, body
diff --git a/tempest/test.py b/tempest/test.py
index 3052f55..5af9ebf 100644
--- a/tempest/test.py
+++ b/tempest/test.py
@@ -15,8 +15,11 @@
 
 import atexit
 import functools
+import json
 import os
 import time
+import urllib
+import uuid
 
 import fixtures
 import nose.plugins.attrib
@@ -24,6 +27,7 @@
 import testtools
 
 from tempest import clients
+from tempest.common import generate_json
 from tempest.common import isolated_creds
 from tempest import config
 from tempest import exceptions
@@ -224,6 +228,7 @@
                    testresources.ResourcedTestCase):
 
     setUpClassCalled = False
+    _service = None
 
     network_resources = {}
 
@@ -286,23 +291,27 @@
                 os = clients.Manager(username=username,
                                      password=password,
                                      tenant_name=tenant_name,
-                                     interface=cls._interface)
+                                     interface=cls._interface,
+                                     service=cls._service)
             elif interface:
                 os = clients.Manager(username=username,
                                      password=password,
                                      tenant_name=tenant_name,
-                                     interface=interface)
+                                     interface=interface,
+                                     service=cls._service)
             else:
                 os = clients.Manager(username=username,
                                      password=password,
-                                     tenant_name=tenant_name)
+                                     tenant_name=tenant_name,
+                                     service=cls._service)
         else:
             if getattr(cls, '_interface', None):
-                os = clients.Manager(interface=cls._interface)
+                os = clients.Manager(interface=cls._interface,
+                                     service=cls._service)
             elif interface:
-                os = clients.Manager(interface=interface)
+                os = clients.Manager(interface=interface, service=cls._service)
             else:
-                os = clients.Manager()
+                os = clients.Manager(service=cls._service)
         return os
 
     @classmethod
@@ -318,7 +327,8 @@
         """
         Returns an instance of the Identity Admin API client
         """
-        os = clients.AdminManager(interface=cls._interface)
+        os = clients.AdminManager(interface=cls._interface,
+                                  service=cls._service)
         admin_client = os.identity_client
         return admin_client
 
@@ -344,6 +354,171 @@
                 'dhcp': dhcp}
 
 
+class NegativeAutoTest(BaseTestCase):
+
+    _resources = {}
+
+    @classmethod
+    def setUpClass(cls):
+        super(NegativeAutoTest, cls).setUpClass()
+        os = cls.get_client_manager()
+        cls.client = os.negative_client
+
+    @staticmethod
+    def load_schema(file):
+        """
+        Loads a schema from a file on a specified location.
+
+        :param file: the file name
+        """
+        #NOTE(mkoderer): must be extended for xml support
+        fn = os.path.join(
+            os.path.abspath(os.path.dirname(os.path.dirname(__file__))),
+            "etc", "schemas", file)
+        LOG.debug("Open schema file: %s" % (fn))
+        return json.load(open(fn))
+
+    @staticmethod
+    def generate_scenario(description_file):
+        """
+        Generates the test scenario list for a given description.
+
+        :param description: A dictionary with the following entries:
+            name (required) name for the api
+            http-method (required) one of HEAD,GET,PUT,POST,PATCH,DELETE
+            url (required) the url to be appended to the catalog url with '%s'
+                for each resource mentioned
+            resources: (optional) A list of resource names such as "server",
+                "flavor", etc. with an element for each '%s' in the url. This
+                method will call self.get_resource for each element when
+                constructing the positive test case template so negative
+                subclasses are expected to return valid resource ids when
+                appropriate.
+            json-schema (optional) A valid json schema that will be used to
+                create invalid data for the api calls. For "GET" and "HEAD",
+                the data is used to generate query strings appended to the url,
+                otherwise for the body of the http call.
+        """
+        description = NegativeAutoTest.load_schema(description_file)
+        LOG.debug(description)
+        generate_json.validate_negative_test_schema(description)
+        schema = description.get("json-schema", None)
+        resources = description.get("resources", [])
+        scenario_list = []
+        for resource in resources:
+            LOG.debug("Add resource to test %s" % resource)
+            scn_name = "inv_res_%s" % (resource)
+            scenario_list.append((scn_name, {"resource": (resource,
+                                                          str(uuid.uuid4()))
+                                             }))
+        if schema is not None:
+            for invalid in generate_json.generate_invalid(schema):
+                scenario_list.append((invalid[0],
+                                      {"schema": invalid[1],
+                                       "expected_result": invalid[2]}))
+        LOG.debug(scenario_list)
+        return scenario_list
+
+    def execute(self, description_file):
+        """
+        Execute a http call on an api that are expected to
+        result in client errors. First it uses invalid resources that are part
+        of the url, and then invalid data for queries and http request bodies.
+
+        :param description: A dictionary with the following entries:
+            name (required) name for the api
+            http-method (required) one of HEAD,GET,PUT,POST,PATCH,DELETE
+            url (required) the url to be appended to the catalog url with '%s'
+                for each resource mentioned
+            resources: (optional) A list of resource names such as "server",
+                "flavor", etc. with an element for each '%s' in the url. This
+                method will call self.get_resource for each element when
+                constructing the positive test case template so negative
+                subclasses are expected to return valid resource ids when
+                appropriate.
+            json-schema (optional) A valid json schema that will be used to
+                create invalid data for the api calls. For "GET" and "HEAD",
+                the data is used to generate query strings appended to the url,
+                otherwise for the body of the http call.
+
+        """
+        description = NegativeAutoTest.load_schema(description_file)
+        LOG.info("Executing %s" % description["name"])
+        LOG.debug(description)
+        method = description["http-method"]
+        url = description["url"]
+
+        resources = [self.get_resource(r) for
+                     r in description.get("resources", [])]
+
+        if hasattr(self, "resource"):
+            # Note(mkoderer): The resources list already contains an invalid
+            # entry (see get_resource).
+            # We just send a valid json-schema with it
+            valid = None
+            schema = description.get("json-schema", None)
+            if schema:
+                valid = generate_json.generate_valid(schema)
+            new_url, body = self._http_arguments(valid, url, method)
+            resp, resp_body = self.client.send_request(method, new_url,
+                                                       resources, body=body)
+            self._check_negative_response(resp.status, resp_body)
+            return
+
+        if hasattr(self, "schema"):
+            new_url, body = self._http_arguments(self.schema, url, method)
+            resp, resp_body = self.client.send_request(method, new_url,
+                                                       resources, body=body)
+            self._check_negative_response(resp.status, resp_body)
+
+    def _http_arguments(self, json_dict, url, method):
+        LOG.debug("dict: %s url: %s method: %s" % (json_dict, url, method))
+        if not json_dict:
+            return url, None
+        elif method in ["GET", "HEAD", "PUT", "DELETE"]:
+            return "%s?%s" % (url, urllib.urlencode(json_dict)), None
+        else:
+            return url, json.dumps(json_dict)
+
+    def _check_negative_response(self, result, body):
+        expected_result = getattr(self, "expected_result", None)
+        self.assertTrue(result >= 400 and result < 500 and result != 413,
+                        "Expected client error, got %s:%s" %
+                        (result, body))
+        self.assertTrue(expected_result is None or expected_result == result,
+                        "Expected %s, got %s:%s" %
+                        (expected_result, result, body))
+
+    @classmethod
+    def set_resource(cls, name, resource):
+        """
+        This function can be used in setUpClass context to register a resoruce
+        for a test.
+
+        :param name: The name of the kind of resource such as "flavor", "role",
+            etc.
+        :resource: The id of the resource
+        """
+        cls._resources[name] = resource
+
+    def get_resource(self, name):
+        """
+        Return a valid uuid for a type of resource. If a real resource is
+        needed as part of a url then this method should return one. Otherwise
+        it can return None.
+
+        :param name: The name of the kind of resource such as "flavor", "role",
+            etc.
+        """
+        if hasattr(self, "resource") and self.resource[0] == name:
+            LOG.debug("Return invalid resource (%s) value: %s" %
+                      (self.resource[0], self.resource[1]))
+            return self.resource[1]
+        if name in self._resources:
+            return self._resources[name]
+        return None
+
+
 def call_until_true(func, duration, sleep_for):
     """
     Call the given function until it returns True (and return True) or