Add test coverage for openstack_git_repo

Just some basic tests to see if we're interacting with git repositories
well.

Change-Id: I796b70ae505ff10111f640d7f530fb4d6f2d5acb

giftwrap/tests/test_repo.py

@@ -0,0 +1,78 @@
+# vim: tabstop=4 shiftwidth=4 softtabstop=4
+#
+#    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 shutil
+import subprocess
+import tempfile
+import unittest2 as unittest
+
+from giftwrap.openstack_git_repo import OpenstackGitRepo
+from giftwrap.openstack_commit import OpenstackCommit
+
+
+def _make_outdir(test):
+    def wrapper(*args, **kwargs):
+        try:
+            outdir = tempfile.mkdtemp()
+            kwargs['outdir'] = outdir
+            return test(*args, **kwargs)
+        finally:
+            shutil.rmtree(outdir)
+    return wrapper
+
+
+def _make_test_repo(test):
+    def wrapper(*args, **kwargs):
+        startdir = os.getcwd()
+        try:
+            testrepo = tempfile.mkdtemp()
+            kwargs['testrepo'] = testrepo
+            os.chdir(testrepo)
+            subprocess.check_call(['git', 'init'])
+            tf_path = os.path.join(testrepo, 'testfile.txt')
+            with open(tf_path, 'w') as tf:
+                tf.write('test content')
+            subprocess.check_call(['git', 'add', 'testfile.txt'])
+            subprocess.check_call(['git', 'commit', '-m', 'test commit'])
+            os.chdir(startdir)
+            return test(*args, **kwargs)
+        finally:
+            shutil.rmtree(testrepo)
+    return wrapper
+
+
+class TestRepo(unittest.TestCase):
+    def test_repo(self):
+        OpenstackGitRepo(None)
+
+    @_make_test_repo
+    def test_repo_properties(self, testrepo):
+        repo = OpenstackGitRepo(testrepo, project='baz')
+        self.assertFalse(repo.cloned)
+        self.assertIs(None, repo.head)
+        self.assertEqual('baz', repo.project)
+        try:
+            repo.branches
+        except AttributeError:
+            self.assertTrue(True)
+
+    @_make_outdir
+    @_make_test_repo
+    def test_repo_clone(self, outdir, testrepo):
+        repo = OpenstackGitRepo(testrepo, project='bobafett')
+        repo.clone(outdir)
+        self.assertTrue(repo.cloned)
+        self.assertTrue(isinstance(repo.head, OpenstackCommit))
+        self.assertEquals(['HEAD', 'master'], repo.branches)