Fix failing integration test.

This fixes a problem where running the integration tests in parallel
would result in errors because the resource names were based on a
timestamp. Now, a new utility method is used which gives back a
unique ID based on a name, a timestamp, and a random integer.

tests/__init__.py

@@ -11,7 +11,9 @@
 # ANY KIND, either express or implied. See the License for the specific
 # language governing permissions and limitations under the License.
 
+import random
 import sys
+import time
 
 
 # The unittest module got a significant overhaul
@@ -30,6 +32,17 @@
     from unittest import mock
 
 
+def unique_id(name):
+    """
+    Generate a unique ID that includes the given name,
+    a timestamp and a random number. This helps when running
+    integration tests in parallel that must create remote
+    resources.
+    """
+    return '{0}-{1}-{2}'.format(name, int(time.time()),
+                                random.randint(0, 10000))
+
+
 class BaseTestCase(unittest.TestCase):
     """
     A base test case which mocks out the low-level session to prevent

tests/integration/test_s3.py

@@ -11,17 +11,16 @@
 # ANY KIND, either express or implied. See the License for the specific
 # language governing permissions and limitations under the License.
 
-import time
 import boto3.session
 
-from tests import unittest
+from tests import unittest, unique_id
 
 
 class TestS3Resource(unittest.TestCase):
     def setUp(self):
         self.session = boto3.session.Session(region_name='us-west-2')
         self.s3 = self.session.resource('s3')
-        self.bucket_name = 'boto3-test-{0}'.format(int(time.time()))
+        self.bucket_name = unique_id('boto3-test')
 
     def test_s3(self):
         client = self.s3.meta['client']

tests/integration/test_sqs.py

@@ -11,17 +11,16 @@
 # ANY KIND, either express or implied. See the License for the specific
 # language governing permissions and limitations under the License.
 
-import time
 import boto3.session
 
-from tests import unittest
+from tests import unittest, unique_id
 
 
 class TestSQSResource(unittest.TestCase):
     def setUp(self):
         self.session = boto3.session.Session(region_name='us-west-2')
         self.sqs = self.session.resource('sqs')
-        self.queue_name = 'boto3-test-{0}'.format(int(time.time()))
+        self.queue_name = unique_id('boto3-test')
 
     def test_s3(self):
         # Create a new resource