added some tests for diff

test/__init__.py

@@ -36,7 +36,7 @@ import unittest
 
 
 names = ['blob', 'commit', 'index', 'refs', 'repository', 'revwalk', 'tag',
-         'tree', 'signature', 'status', 'treebuilder']
+         'tree', 'signature', 'status', 'treebuilder', 'diff']
 def test_suite():
     modules = ['test.test_%s' % n for n in names]
     return unittest.defaultTestLoader.loadTestsFromNames(modules)

test/test_diff.py

@@ -0,0 +1,94 @@
+# -*- coding: UTF-8 -*-
+#
+# Copyright 2012 Nico von Geyso
+#
+# This file is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License, version 2,
+# as published by the Free Software Foundation.
+#
+# In addition to the permissions in the GNU General Public License,
+# the authors give you unlimited permission to link the compiled
+# version of this file into combinations with other programs,
+# and to distribute those combinations without any restriction
+# coming from the use of this file.  (The General Public License
+# restrictions do apply in other respects; for example, they cover
+# modification of the file, and distribution when not linked into
+# a combined executable.)
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; see the file COPYING.  If not, write to
+# the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+# Boston, MA 02110-1301, USA.
+
+"""Tests for Diff objects."""
+
+from __future__ import absolute_import
+from __future__ import unicode_literals
+import unittest
+
+import pygit2
+from . import utils
+
+__author__ = 'Nico.Geyso@FU-Berlin.de (Nico von Geyso)'
+
+
+COMMIT_SHA1_1 = '5fe808e8953c12735680c257f56600cb0de44b10'
+COMMIT_SHA1_2 = 'c2792cfa289ae6321ecf2cd5806c2194b0fd070c'
+PATCH = b"""diff --git a/a b/a
+index 7f129fd..af431f2 100644
+--- a/a
++++ b/a
+@@ -1 +1 @@
+-a contents 2
++a contents
+diff --git a/c/d b/c/d
+deleted file mode 100644
+index 297efb8..0000000
+--- a/c/d
++++ /dev/null
+@@ -1 +0,0 @@
+-c/d contents
+"""
+
+
+class DiffTest(utils.BareRepoTestCase):
+
+    def test_diff_invalid(self):
+        commit_a = self.repo[COMMIT_SHA1_1]
+        commit_b = self.repo[COMMIT_SHA1_2]
+        self.assertRaises(TypeError, commit_a.tree.diff, commit_b)
+
+    def test_diff_tree(self):
+        commit_a = self.repo[COMMIT_SHA1_1]
+        commit_b = self.repo[COMMIT_SHA1_2]
+
+        diff = commit_a.tree.diff(commit_b.tree)
+
+        self.assertIsNotNone(diff)
+        self.assertIn(('a','a', 3), diff.changes['files'])
+        self.assertEqual(2, len(diff.changes['hunks']))
+
+        hunk = diff.changes['hunks'][0]
+        self.assertEqual(hunk.old_start, 1)
+        self.assertEqual(hunk.old_lines, 0)
+        self.assertEqual(hunk.new_start, 1)
+        self.assertEqual(hunk.new_lines, 0)
+
+        self.assertEqual(hunk.old_data, b'a contents 2\n')
+        self.assertEqual(hunk.new_data, b'a contents\n')
+
+    def test_diff_patch(self):
+        commit_a = self.repo[COMMIT_SHA1_1]
+        commit_b = self.repo[COMMIT_SHA1_2]
+
+        diff = commit_a.tree.diff(commit_b.tree)
+        self.assertEqual(diff.patch, PATCH)
+
+
+if __name__ == '__main__':
+    unittest.main()