utils: Added LockFile including test

GitConfigFile is now derived from LockFile using its capabilities
Implemented ConcurrentWriteOperation, test is yet to be done

1 files changed, 36 insertions, 1 deletions

diff --git a/test/git/test_utils.py b/test/git/test_utils.py
index 6852d0ad..61527758 100644
--- a/test/git/test_utils.py
+++ b/test/git/test_utils.py
@@ -5,11 +5,15 @@
 # the BSD License: http://www.opensource.org/licenses/bsd-license.php
 
 import os
+import tempfile
+
 from test.testlib import *
+from git.utils import *
 from git import *
 from git.cmd import dashify
 
-class TestUtils(object):
+
+class TestUtils(TestCase):
 	def setup(self):
 		self.testdict = {
 			"string":	"42",
@@ -20,3 +24,34 @@ class TestUtils(object):
 	def test_it_should_dashify(self):
 		assert_equal('this-is-my-argument', dashify('this_is_my_argument'))
 		assert_equal('foo', dashify('foo'))
+		
+		
+	def test_lock_file(self):
+		my_file = tempfile.mktemp()
+		lock_file = LockFile(my_file)
+		assert not lock_file._has_lock()
+		# release lock we don't have  - fine
+		lock_file._release_lock()
+		
+		# get lock
+		lock_file._obtain_lock_or_raise()
+		assert lock_file._has_lock()
+		
+		# concurrent access
+		other_lock_file = LockFile(my_file)
+		assert not other_lock_file._has_lock()
+		self.failUnlessRaises(IOError, other_lock_file._obtain_lock_or_raise)
+		
+		lock_file._release_lock()
+		assert not lock_file._has_lock()
+		
+		other_lock_file._obtain_lock_or_raise()
+		self.failUnlessRaises(IOError, lock_file._obtain_lock_or_raise)
+		
+		# auto-release on destruction
+		del(other_lock_file)
+		lock_file._obtain_lock_or_raise()
+		lock_file._release_lock()
+		
+	def test_safe_operation(self):
+		self.fail("todo")