Implemented @utils.skip_test, @utils.skip_unless and @utils.skip_if functionality in glance/test/utils.py. Added glance/tests/unit/test_skip_examples.py which contains example skip case usages.

Fixed issue where ./run_tests.sh would not execute pep8. Fixed couple of pep8 violations in test_skip_examples.py

Change-Id: Id6eaa8768b663b4638fbca0e3bdf72b74969150a

.gitignore

@@ -0,0 +1,4 @@
+*.pyc
+*.log
+.glance-venv
+tests.sqlite

glance/tests/unit/test_skip_examples.py

@@ -0,0 +1,48 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2010-2011 OpenStack, LLC
+# 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 unittest
+
+from glance.tests import utils
+
+
+class TestSkipExamples(unittest.TestCase):
+    test_counter = 0
+
+    @utils.skip_test("Example usage of @utils.skip_test()")
+    def test_skip_test_example(self):
+        self.fail("skip_test failed to work properly.")
+
+    @utils.skip_if(True, "Example usage of @utils.skip_if()")
+    def test_skip_if_example(self):
+        self.fail("skip_if failed to work properly.")
+
+    @utils.skip_unless(False, "Example usage of @utils.skip_unless()")
+    def test_skip_unless_example(self):
+        self.fail("skip_unless failed to work properly.")
+
+    @utils.skip_if(False, "This test case should never be skipped.")
+    def test_001_increase_test_counter(self):
+        TestSkipExamples.test_counter += 1
+
+    @utils.skip_unless(True, "This test case should never be skipped.")
+    def test_002_increase_test_counter(self):
+        TestSkipExamples.test_counter += 1
+
+    def test_003_verify_test_counter(self):
+        self.assertEquals(TestSkipExamples.test_counter, 2,
+                          "Tests were not skipped appropriately")

glance/tests/utils.py

@@ -21,6 +21,56 @@ import os
 import socket
 import subprocess
 
+import nose.plugins.skip
+
+
+class skip_test(object):
+    """Decorator that skips a test."""
+    def __init__(self, msg):
+        self.message = msg
+
+    def __call__(self, func):
+        def _skipper(*args, **kw):
+            """Wrapped skipper function."""
+            raise nose.SkipTest(self.message)
+        _skipper.__name__ = func.__name__
+        _skipper.__doc__ = func.__doc__
+        return _skipper
+
+
+class skip_if(object):
+    """Decorator that skips a test if contition is true."""
+    def __init__(self, condition, msg):
+        self.condition = condition
+        self.message = msg
+
+    def __call__(self, func):
+        def _skipper(*args, **kw):
+            """Wrapped skipper function."""
+            if self.condition:
+                raise nose.SkipTest(self.message)
+            func(*args, **kw)
+        _skipper.__name__ = func.__name__
+        _skipper.__doc__ = func.__doc__
+        return _skipper
+
+
+class skip_unless(object):
+    """Decorator that skips a test if condition is not true."""
+    def __init__(self, condition, msg):
+        self.condition = condition
+        self.message = msg
+
+    def __call__(self, func):
+        def _skipper(*args, **kw):
+            """Wrapped skipper function."""
+            if not self.condition:
+                raise nose.SkipTest(self.message)
+            func(*args, **kw)
+        _skipper.__name__ = func.__name__
+        _skipper.__doc__ = func.__doc__
+        return _skipper
+
 
 def execute(cmd, raise_error=True):
     """

run_tests.py

@@ -234,7 +234,7 @@ class GlanceTestResult(result.TextTestResult):
                 if stream is not None:
                     if self.showAll:
                         message = [label]
-                        detail = result._exception_details(err[1])
+                        detail = result._exception_detail(err[1])
                         if detail:
                             message.append(detail)
                         stream.writeln(": ".join(message))

run_tests.sh

@@ -59,7 +59,7 @@ function run_pep8 {
   PEP8_EXCLUDE=vcsversion.py
   PEP8_OPTIONS="--exclude=$PEP8_EXCLUDE --repeat --show-pep8 --show-source"
   PEP8_INCLUDE="bin/* glance tools setup.py run_tests.py"
-  pep8 $PEP8_OPTIONS $PEP8_INCLUDE
+  ${wrapper} pep8 $PEP8_OPTIONS $PEP8_INCLUDE
 }