# Copyright (C) 2009 Google Inc. All rights reserved.
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import re
import unittest
from blinkpy.common.checkout.diff_parser import DiffParser
from blinkpy.common.checkout.diff_test_data import DIFF_TEST_DATA
class DiffParserTest(unittest.TestCase):
def test_diff_parser(self, parser=None):
if not parser:
parser = DiffParser(DIFF_TEST_DATA.splitlines())
self.assertEqual(3, len(parser.files))
self.assertIn('WebCore/style/StyleFlexibleBoxData.h', parser.files)
diff = parser.files['WebCore/style/StyleFlexibleBoxData.h']
self.assertEqual(7, len(diff.lines))
# The first two unchanged lines.
self.assertEqual((47, 47), diff.lines[0][0:2])
self.assertEqual('', diff.lines[0][2])
self.assertEqual((48, 48), diff.lines[1][0:2])
self.assertEqual(' unsigned align : 3; // EBoxAlignment',
diff.lines[1][2])
# The deleted line.
self.assertEqual((50, 0), diff.lines[3][0:2])
self.assertEqual(' unsigned orient: 1; // EBoxOrient',
diff.lines[3][2])
# The first file looks OK. Let's check the next, more complicated file.
self.assertIn('WebCore/style/StyleRareInheritedData.cpp', parser.files)
diff = parser.files['WebCore/style/StyleRareInheritedData.cpp']
# There are 3 chunks.
self.assertEqual(7 + 7 + 9, len(diff.lines))
# Around an added line.
self.assertEqual((60, 61), diff.lines[9][0:2])
self.assertEqual((0, 62), diff.lines[10][0:2])
self.assertEqual((61, 63), diff.lines[11][0:2])
# Look through the last chunk, which contains both adds and deletes.
self.assertEqual((81, 83), diff.lines[14][0:2])
self.assertEqual((82, 84), diff.lines[15][0:2])
self.assertEqual((83, 85), diff.lines[16][0:2])
self.assertEqual((84, 0), diff.lines[17][0:2])
self.assertEqual((0, 86), diff.lines[18][0:2])
self.assertEqual((0, 87), diff.lines[19][0:2])
self.assertEqual((85, 88), diff.lines[20][0:2])
self.assertEqual((86, 89), diff.lines[21][0:2])
self.assertEqual((87, 90), diff.lines[22][0:2])
# Check if a newly added file is correctly handled.
diff = parser.files[
'web_tests/platform/mac/fast/flexbox/box-orient-button-expected.checksum']
self.assertEqual(1, len(diff.lines))
self.assertEqual((0, 1), diff.lines[0][0:2])
def test_diff_parser_with_different_mnemonic_prefixes(self):
# This repeats test_diff_parser but with different versions
# of DIFF_TEST_DATA that use other prefixes instead of a/b.
prefixes = (
# git-diff (compares the (i)ndex and the (w)ork tree)
('i', 'w'),
# git-diff HEAD (compares a (c)ommit and the (w)ork tree)
('c', 'w'),
# git diff --cached (compares a (c)ommit and the (i)ndex)
('c', 'i'),
# git-diff HEAD:file1 file2 (compares an (o)bject and a (w)ork tree entity)
('o', 'w'),
# git diff --no-index a b (compares two non-git things (1) and (2))
('1', '2'),
)
for a_replacement, b_replacement in prefixes:
patch = self._patch(a_replacement, b_replacement)
self.test_diff_parser(DiffParser(patch.splitlines()))
@staticmethod
def _patch(a_replacement='a', b_replacement='b'):
"""Returns a version of the example patch with mnemonic prefixes a/b changed."""
patch = re.sub(r' a/', ' %s/' % a_replacement, DIFF_TEST_DATA)
return re.sub(r' b/', ' %s/' % b_replacement, patch)
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