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# Copyright (C) 2004 - 2008 Aaron Bentley, Canonical Ltd
# <aaron.bentley@utoronto.ca>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program 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; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import os.path
from bzrlib.tests import TestCase
from bzrlib.iterablefile import IterableFile
from bzrlib.patches import (MalformedLine,
MalformedHunkHeader,
MalformedPatchHeader,
ContextLine,
InsertLine,
RemoveLine,
difference_index,
get_patch_names,
hunk_from_header,
iter_patched,
iter_patched_from_hunks,
parse_line,
parse_patch,
parse_patches)
class PatchesTester(TestCase):
def datafile(self, filename):
data_path = os.path.join(os.path.dirname(__file__),
"test_patches_data", filename)
return file(data_path, "rb")
def testValidPatchHeader(self):
"""Parse a valid patch header"""
lines = "--- orig/commands.py\n+++ mod/dommands.py\n".split('\n')
(orig, mod) = get_patch_names(lines.__iter__())
self.assertEqual(orig, "orig/commands.py")
self.assertEqual(mod, "mod/dommands.py")
def testInvalidPatchHeader(self):
"""Parse an invalid patch header"""
lines = "-- orig/commands.py\n+++ mod/dommands.py".split('\n')
self.assertRaises(MalformedPatchHeader, get_patch_names,
lines.__iter__())
def testValidHunkHeader(self):
"""Parse a valid hunk header"""
header = "@@ -34,11 +50,6 @@\n"
hunk = hunk_from_header(header);
self.assertEqual(hunk.orig_pos, 34)
self.assertEqual(hunk.orig_range, 11)
self.assertEqual(hunk.mod_pos, 50)
self.assertEqual(hunk.mod_range, 6)
self.assertEqual(str(hunk), header)
def testValidHunkHeader2(self):
"""Parse a tricky, valid hunk header"""
header = "@@ -1 +0,0 @@\n"
hunk = hunk_from_header(header);
self.assertEqual(hunk.orig_pos, 1)
self.assertEqual(hunk.orig_range, 1)
self.assertEqual(hunk.mod_pos, 0)
self.assertEqual(hunk.mod_range, 0)
self.assertEqual(str(hunk), header)
def testPDiff(self):
"""Parse a hunk header produced by diff -p"""
header = "@@ -407,7 +292,7 @@ bzr 0.18rc1 2007-07-10\n"
hunk = hunk_from_header(header)
self.assertEqual('bzr 0.18rc1 2007-07-10', hunk.tail)
self.assertEqual(header, str(hunk))
def makeMalformed(self, header):
self.assertRaises(MalformedHunkHeader, hunk_from_header, header)
def testInvalidHeader(self):
"""Parse an invalid hunk header"""
self.makeMalformed(" -34,11 +50,6 \n")
self.makeMalformed("@@ +50,6 -34,11 @@\n")
self.makeMalformed("@@ -34,11 +50,6 @@")
self.makeMalformed("@@ -34.5,11 +50,6 @@\n")
self.makeMalformed("@@-34,11 +50,6@@\n")
self.makeMalformed("@@ 34,11 50,6 @@\n")
self.makeMalformed("@@ -34,11 @@\n")
self.makeMalformed("@@ -34,11 +50,6.5 @@\n")
self.makeMalformed("@@ -34,11 +50,-6 @@\n")
def lineThing(self,text, type):
line = parse_line(text)
self.assertIsInstance(line, type)
self.assertEqual(str(line), text)
def makeMalformedLine(self, text):
self.assertRaises(MalformedLine, parse_line, text)
def testValidLine(self):
"""Parse a valid hunk line"""
self.lineThing(" hello\n", ContextLine)
self.lineThing("+hello\n", InsertLine)
self.lineThing("-hello\n", RemoveLine)
def testMalformedLine(self):
"""Parse invalid valid hunk lines"""
self.makeMalformedLine("hello\n")
def compare_parsed(self, patchtext):
lines = patchtext.splitlines(True)
patch = parse_patch(lines.__iter__())
pstr = str(patch)
i = difference_index(patchtext, pstr)
if i is not None:
print "%i: \"%s\" != \"%s\"" % (i, patchtext[i], pstr[i])
self.assertEqual (patchtext, str(patch))
def testAll(self):
"""Test parsing a whole patch"""
patchtext = self.datafile("patchtext.patch").read()
self.compare_parsed(patchtext)
def testInit(self):
"""Handle patches missing half the position, range tuple"""
patchtext = \
"""--- orig/__vavg__.cl
+++ mod/__vavg__.cl
@@ -1 +1,2 @@
__qbpsbezng__ = "erfgehpgherqgrkg ra"
+__qbp__ = Na nygreangr Nepu pbzznaqyvar vagresnpr
"""
self.compare_parsed(patchtext)
def testLineLookup(self):
import sys
"""Make sure we can accurately look up mod line from orig"""
patch = parse_patch(self.datafile("diff"))
orig = list(self.datafile("orig"))
mod = list(self.datafile("mod"))
removals = []
for i in range(len(orig)):
mod_pos = patch.pos_in_mod(i)
if mod_pos is None:
removals.append(orig[i])
continue
self.assertEqual(mod[mod_pos], orig[i])
rem_iter = removals.__iter__()
for hunk in patch.hunks:
for line in hunk.lines:
if isinstance(line, RemoveLine):
next = rem_iter.next()
if line.contents != next:
sys.stdout.write(" orig:%spatch:%s" % (next,
line.contents))
self.assertEqual(line.contents, next)
self.assertRaises(StopIteration, rem_iter.next)
def testPatching(self):
"""Test a few patch files, and make sure they work."""
files = [
('diff-2', 'orig-2', 'mod-2'),
('diff-3', 'orig-3', 'mod-3'),
('diff-4', 'orig-4', 'mod-4'),
('diff-5', 'orig-5', 'mod-5'),
('diff-6', 'orig-6', 'mod-6'),
]
for diff, orig, mod in files:
patch = self.datafile(diff)
orig_lines = list(self.datafile(orig))
mod_lines = list(self.datafile(mod))
patched_file = IterableFile(iter_patched(orig_lines, patch))
lines = []
count = 0
for patch_line in patched_file:
self.assertEqual(patch_line, mod_lines[count])
count += 1
self.assertEqual(count, len(mod_lines))
def test_iter_patched_from_hunks(self):
"""Test a few patch files, and make sure they work."""
files = [
('diff-2', 'orig-2', 'mod-2'),
('diff-3', 'orig-3', 'mod-3'),
('diff-4', 'orig-4', 'mod-4'),
('diff-5', 'orig-5', 'mod-5'),
('diff-6', 'orig-6', 'mod-6'),
]
for diff, orig, mod in files:
parsed = parse_patch(self.datafile(diff))
orig_lines = list(self.datafile(orig))
mod_lines = list(self.datafile(mod))
iter_patched = iter_patched_from_hunks(orig_lines, parsed.hunks)
patched_file = IterableFile(iter_patched)
lines = []
count = 0
for patch_line in patched_file:
self.assertEqual(patch_line, mod_lines[count])
count += 1
self.assertEqual(count, len(mod_lines))
def testFirstLineRenumber(self):
"""Make sure we handle lines at the beginning of the hunk"""
patch = parse_patch(self.datafile("insert_top.patch"))
self.assertEqual(patch.pos_in_mod(0), 1)
def testParsePatches(self):
"""Make sure file names can be extracted from tricky unified diffs"""
patchtext = \
"""--- orig-7
+++ mod-7
@@ -1,10 +1,10 @@
-- a
--- b
+++ c
xx d
xx e
++ f
-++ g
+-- h
xx i
xx j
-- k
--- l
+++ m
--- orig-8
+++ mod-8
@@ -1 +1 @@
--- A
+++ B
@@ -1 +1 @@
--- C
+++ D
"""
filenames = [('orig-7', 'mod-7'),
('orig-8', 'mod-8')]
patches = parse_patches(patchtext.splitlines(True))
patch_files = []
for patch in patches:
patch_files.append((patch.oldname, patch.newname))
self.assertEqual(patch_files, filenames)
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