Implemented @test.skip_unless and @test.skip_if functionality in nova/test.py.

Added nova/tests/test_skip_examples.py which contains example skip case usages.

nova/test.py

@@ -60,11 +60,42 @@ class skip_test(object):
         self.message = msg
 
     def __call__(self, func):
+        @functools.wraps(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):
+        @functools.wraps(func)
+        def _skipper(*args, **kw):
+            """Wrapped skipper function."""
+            if self.condition:
+                raise nose.SkipTest(self.message)
+            func(*args, **kw)
+        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):
+        @functools.wraps(func)
+        def _skipper(*args, **kw):
+            """Wrapped skipper function."""
+            if not self.condition:
+                raise nose.SkipTest(self.message)
+            func(*args, **kw)
         return _skipper
 
 

nova/tests/test_skip_examples.py

@@ -0,0 +1,47 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2010 United States Government as represented by the
+# Administrator of the National Aeronautics and Space Administration.
+# 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.
+
+from nova import test
+
+
+class ExampleSkipTestCase(test.TestCase):
+    test_counter = 0
+
+    @test.skip_test("Example usage of @test.skip_test()")
+    def test_skip_test_example(self):
+        self.fail("skip_test failed to work properly.")
+
+    @test.skip_if(True, "Example usage of @test.skip_if()")
+    def test_skip_if_example(self):
+        self.fail("skip_if failed to work properly.")
+
+    @test.skip_unless(False, "Example usage of @test.skip_unless()")
+    def test_skip_unless_example(self):
+        self.fail("skip_unless failed to work properly.")
+
+    @test.skip_if(False, "This test case should never be skipped.")
+    def test_001_increase_test_counter(self):
+        ExampleSkipTestCase.test_counter += 1
+
+    @test.skip_unless(True, "This test case should never be skipped.")
+    def test_002_increase_test_counter(self):
+        ExampleSkipTestCase.test_counter += 1
+
+    def test_003_verify_test_counter(self):
+        self.assertEquals(ExampleSkipTestCase.test_counter, 2,
+                          "Tests were not skipped appropriately")