Run doctests in a temporary directory.

Run 1-initial-commit tests.

docs/tutorial/1-initial-commit.txt

@@ -22,7 +22,7 @@ Let's create a folder and turn it into a repository, like ``git init`` would::
   >>> mkdir("myrepo")
   >>> repo = Repo.init("myrepo")
   >>> repo
-  <Repo at '/tmp/myrepo/'>
+  <Repo at 'myrepo'>
 
 You can already look a the structure of the "myrepo/.git" folder, though it
 is mostly empty for now.
@@ -61,7 +61,7 @@ job of the commit::
   >>> author = "Your Name <your.email@example.com>"
   >>> commit.author = commit.committer = author
   >>> commit.commit_time = commit.author_time = int(time())
-  >>> tz = parse_timezone('-0200')
+  >>> tz = parse_timezone('-0200')[0]
   >>> commit.commit_timezone = commit.author_timezone = tz
   >>> commit.encoding = "UTF-8"
   >>> commit.message = "Initial commit"

dulwich/tests/__init__.py

@@ -22,6 +22,8 @@
 import doctest
 import os
 import unittest
+import shutil
+import tempfile
 
 try:
     from testtools.testcase import TestCase
@@ -78,8 +80,15 @@ def test_suite():
     result.addTests(suite)
     tutorial = [
         '0-introduction',
+        '1-initial-commit',
         ]
     tutorial_files = ["../../docs/tutorial/%s.txt" % name for name in tutorial]
-    suite = doctest.DocFileSuite(*tutorial_files)
+    def setup(test):
+        test.__dulwich_tempdir = tempfile.mkdtemp()
+        os.chdir(test.__dulwich_tempdir)
+    def teardown(test):
+        shutil.rmtree(test.__dulwich_tempdir)
+    suite = doctest.DocFileSuite(*tutorial_files, setUp=setup,
+        tearDown=teardown)
     result.addTests(suite)
     return result