Add general function for generating random names

Adding function gen_random_resource_name for generation random resources
that should be used in the integration tests. Mentioned method
automatically adds horizon string into the resource name in order to clearly
distinguish resource origin.

Also timestamp is added for better debugging of the tests in more
complex testcases.

uuid4 function is used to minimize resource name collisions.

Closes-Bug: #1399219
Partially implements blueprint: selenium-integration-testing

Change-Id: Id5cb26e50b7b442af69798a2928be514adf7d8fe

openstack_dashboard/test/integration_tests/helpers.py

@@ -11,6 +11,8 @@
 # under the License.
 
 import os
+import time
+import uuid
 
 from selenium.webdriver.support import ui
 import testtools
@@ -21,6 +23,25 @@ from openstack_dashboard.test.integration_tests.pages import loginpage
 from openstack_dashboard.test.integration_tests import webdriver
 
 
+def gen_random_resource_name(resource="", timestamp=True):
+    """Generate random resource name using uuid and timestamp.
+
+    Input fields are usually limited to 255 or 80 characters hence their
+    provide enough space for quite long resource names, but it might be
+    the case that maximum field length is quite restricted, it is then
+    necessary to consider using shorter resource argument or avoid using
+    timestamp by setting timestamp argument to False.
+    """
+    fields = ["horizon"]
+    if resource:
+        fields.append(resource)
+    if timestamp:
+        tstamp = time.strftime("%d-%m-%H-%M-%S")
+        fields.append(tstamp)
+    fields.append(str(uuid.uuid4()).replace("-", ""))
+    return "_".join(fields)
+
+
 class BaseTestCase(testtools.TestCase):
 
     def setUp(self):

openstack_dashboard/test/integration_tests/tests/test_flavors.py

@@ -10,13 +10,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import uuid
-
 from openstack_dashboard.test.integration_tests import helpers
 
 
 class TestFlavors(helpers.AdminTestCase):
-    FLAVOR_NAME = 'horizonflavor_' + str(uuid.uuid4())
+    FLAVOR_NAME = helpers.gen_random_resource_name("flavor")
 
     def test_flavor_create(self):
         """tests the flavor creation and deletion functionalities:

openstack_dashboard/test/integration_tests/tests/test_image_create_delete.py

@@ -10,13 +10,11 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import uuid
-
 from openstack_dashboard.test.integration_tests import helpers
 
 
 class TestImage(helpers.TestCase):
-    IMAGE_NAME = 'horizonimage_' + str(uuid.uuid4())
+    IMAGE_NAME = helpers.gen_random_resource_name("image")
 
     def test_image_create_delete(self):
         """tests the image creation and deletion functionalities:

openstack_dashboard/test/integration_tests/tests/test_keypair.py

@@ -13,14 +13,12 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import uuid
-
 from openstack_dashboard.test.integration_tests import helpers
 
 
 class TestKeypair(helpers.TestCase):
     """Checks that the user is able to create/delete keypair."""
-    KEYPAIR_NAME = 'horizonkeypair_' + str(uuid.uuid4())
+    KEYPAIR_NAME = helpers.gen_random_resource_name("keypair")
 
     def test_keypair(self):
         keypair_page = self.home_pg.go_to_accessandsecurity_keypairspage()