GitRepository/diff: add 'paths' argument

Makes the diff function more versatile. I.e. makes diffing only certain
paths possible. Also, add basic unittests for the diff() method.

Signed-off-by: Markus Lehtonen <markus.lehtonen@linux.intel.com>

1 files changed, 17 insertions, 0 deletions

diff --git a/tests/test_GitRepository.py b/tests/test_GitRepository.py
index 1b3f5b8..5b9fc92 100644
--- a/tests/test_GitRepository.py
+++ b/tests/test_GitRepository.py
@@ -410,6 +410,23 @@ def test_get_commit_info():
     defaultdict(<type 'list'>, {'M': ['testfile']})
     """
 
+def test_diff():
+    """
+    Test git-diff
+
+    Methods tested:
+         - L{gbp.git.GitRepository.diff}
+
+    >>> import gbp.git
+    >>> repo = gbp.git.GitRepository(repo_dir)
+    >>> len(repo.diff('HEAD~1', 'HEAD')) > 3
+    True
+    >>> len(repo.diff('HEAD~1', 'HEAD', 'testfile')) > 3
+    True
+    >>> len(repo.diff('HEAD~1', 'HEAD', 'filenotexist')) == 0
+    True
+    """
+
 def test_mirror_clone():
     """
     Mirror a repository