Add base test class for unit tests

This commit adds a base test class for the tempest unit tests. The
base class uses fixtures to capture STDOUT and STDERR as well as
providing an interface to use mox to stubout tests.

Change-Id: Ia60cccd77cfb6489f888ff088351fe267115a22f

tempest/tests/base.py

@@ -0,0 +1,55 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+
+# Copyright 2013 IBM Corp.
+#
+#    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 os
+
+import fixtures
+import mox
+import stubout
+import testtools
+
+
+class MoxStubout(fixtures.Fixture):
+    """Deal with code around mox and stubout as a fixture."""
+
+    def setUp(self):
+        super(MoxStubout, self).setUp()
+        # emulate some of the mox stuff, we can't use the metaclass
+        # because it screws with our generators
+        self.mox = mox.Mox()
+        self.stubs = stubout.StubOutForTesting()
+        self.addCleanup(self.stubs.UnsetAll)
+        self.addCleanup(self.stubs.SmartUnsetAll)
+        self.addCleanup(self.mox.UnsetStubs)
+        self.addCleanup(self.mox.VerifyAll)
+
+
+class TestCase(testtools.TestCase):
+
+    def setUp(self):
+        super(TestCase, self).setUp()
+        if (os.environ.get('OS_STDOUT_CAPTURE') == 'True' or
+                os.environ.get('OS_STDOUT_CAPTURE') == '1'):
+            stdout = self.useFixture(fixtures.StringStream('stdout')).stream
+            self.useFixture(fixtures.MonkeyPatch('sys.stdout', stdout))
+        if (os.environ.get('OS_STDERR_CAPTURE') == 'True' or
+                os.environ.get('OS_STDERR_CAPTURE') == '1'):
+            stderr = self.useFixture(fixtures.StringStream('stderr')).stream
+            self.useFixture(fixtures.MonkeyPatch('sys.stderr', stderr))
+
+        mox_fixture = self.useFixture(MoxStubout())
+        self.mox = mox_fixture.mox
+        self.stubs = mox_fixture.stubs

tempest/tests/test_wrappers.py

@@ -18,12 +18,13 @@ import os
 import shutil
 import subprocess
 import tempfile
-import testtools
+
+from tempest.tests import base
 
 DEVNULL = open(os.devnull, 'wb')
 
 
-class TestWrappers(testtools.TestCase):
+class TestWrappers(base.TestCase):
     def setUp(self):
         super(TestWrappers, self).setUp()
         # Setup test dirs

test-requirements.txt

@@ -4,3 +4,4 @@ docutils==0.9.1
 sphinx>=1.1.2
 python-subunit
 oslo.sphinx
+mox>=0.5.3