This tests itself.

keystone_api_test.py

    def test_tenant_create(self):
        kwargs = {'id': TEST_TENANT_ID,
                  'description': 'aDescription',
                  "enabled": True}
        tenant = keystoneclient_tenants.Tenant(self.request, kwargs)
        keystoneclient = self.stub_keystoneclient()
        keystoneclient.tenants = self.mox.CreateMockAnything()
        keystoneclient.tenants.create(*kwargs.values()).AndReturn(tenant)

        self.mox.ReplayAll()

        ret_val = api.tenant_create(self.request, *kwargs.values())
        for key, val in kwargs.items():
            self.assertEqual(val, getattr(ret_val, key))